Seminars and Colloquia, July through December, 2005

• This Week's schedule.
• Earlier Semesters.
• Typical Week's schedule.
• July 4-8, 2005's schedule.
• July 11-15, 2005's schedule.
• July 18-25, 2005's schedule.
• July 25-29, 2005's schedule.
• August 1-5, 2005's schedule.
• August 8-12, 2005's schedule.
• August 15-19, 2005's schedule.
• August 22-26, 2005's schedule.
• August 29-September 2, 2005's schedule.
• September 5-9, 2005's schedule.
• September 12-16, 2005's schedule.
• September 19-23, 2005's schedule.
• September 26-30, 2005's schedule.
• October 3-7, 2005's schedule.
• October 10-14, 2005's schedule.
• October 17-21, 2005's schedule.
• October 24-28, 2005's schedule.
• October 31-November 4, 2005's schedule.
• November 7-11, 2005's schedule.
• November 14-18, 2005's schedule.
• November 21-25, 2005's schedule.
• November 28-December 2, 2005's schedule.
• December 5-9, 2005's schedule.
• December 12-16, 2005's schedule.
• December 19-23, 2005's schedule.
• December 26-30, 2005's schedule.

Seminars and Colloquia, Typical Week:

Center for Sensors & Sensor Technologies Seminar:

Physics Undergraduate Journal Club:

Oklahoma High Energy Physics Seminar on Talk-Back Television:

Physics Colloquium:

Journal Club on Statistical Mechanics and Condensed Matter Physics (Informal):

Oklahoma NanoNet Informal Seminar:

Oklahoma State Physics Department

Seminars and Colloquia, July 4-8, 2005

2005 REU Faculty Talks:

Oklahoma State Physics Department

Seminars and Colloquia, July 11-15, 2005

2005 REU Faculty Talks:

2005 REU Faculty Talks:

Oklahoma State Physics Department

Seminars and Colloquia, July 18-22, 2005

2005 REU Faculty Talks:

2005 REU Faculty Talks:

Oklahoma State Physics Department

Seminars and Colloquia, July 25-29, 2005

Research Experience for Undergraduates Presentations:

Thursday, July 28, 2005, Room PS 147

Note: For more detail see the REU 2005 Presentations webpage.

Research Experience for Undergraduates Presentations:

Friday, July 29, 2005, Room PS 147

Note: For more detail see the REU 2005 Presentations webpage.

Oklahoma State Physics Department

Seminars and Colloquia, August 1-5, 2005

Quantum Optics Seminar:

Abstract:

We predict a hitherto unknown duality in the entanglement of identical particles. If two identical particles, distinguished by a dynamical variable A, are in certain entangled states of another dynamical variable B, then, for such states, they can also be considered as entangled in variable A when distinguished from each other by variable B. We formulate a system independent scheme to test this dualism which is potentially realizable with photons, electrons, atoms etc. The scheme can be performed without bringing the particles together. Thus whether two macro-systems are able to behave as quantum identical objects can be probed without any complications of scattering.

Journal Club on Statistical Mechanics and Condensed Matter Physics (Informal):

Oklahoma State Physics Department

Seminars and Colloquia, August 8-12, 2005

Special Physics Seminar:

Abstract:

A quantum geometrodynamical approach is developed for the computation of unified mass-spacetimes (MST). The resulting theory of the evolution of quantum dynamical manifolds (QDMs) is shown to contain contemporary quantum mechanics. This approach overcomes a major obstacle in Yang-Mills theories that generalize Maxwell’s equations. The process used transforms the basis of abstract vectors defining the geometry of the QDM so that the equations of the geometrodynamical extension of quantum mechanics, called quantum dynamical manifold equations (QDMEs), can be put into a canonical form. This places the effects causing problems in Yang-Mills theories into the abstract vector space basis in a way that the resulting equations are integrable. The QDMEs are shown to be completely classifiable according to the Cartan-Killing theorem of Lie algebra theory. This leads to a hierarchy of equations that include, at lower energies, ones for manifolds with u(1), su(2), and su(3),…, Lie algebraic symmetry. The physical picture of the resulting unified MST is of a self-consistently curved and twisted QDM in which each effective (quasi-) particle appears free, particles can be created and destroyed and interact through the quantum dynamical manifold they collectively create. Examples of the solution of the QDMEs are given. In particular, it is shown that the Dirac-Maxwell system of equations, extended so they have manifold solutions, are QDMEs with Lie group symmetric QDM solutions.

Computability of masses and order parameters in the Standard Model is demonstrated. The non uniqueness of the Higgs field is shown and its role in eliminating uv-renormalization is reviewed. It is indicated how ir-divergences can be mollified by the presence of quantum spacetime fluctuations. The prediction of a new particle called the gravitrino and how it is responsible for dark matter is described. This is then related to the presence of galactic jets and the cosmological variation of Newton’s gravitational parameter. The relation of quantum dynamical manifold evolution to the existence of dark energy is discussed in the context of an extension of general relativity allowing for energy-momentum flux.

Note: For more information, contact Dr. Tom Collins.

Oklahoma State Physics Department

Seminars and Colloquia, August 15-19, 2005

No talks scheduled

Oklahoma State Physics Department

Seminars and Colloquia, August 22-26, 2005

First Week of Classes

Physics Colloquium:

Abstract:

The problem of energy deposition of a projectile when it collides with a material target has attracted the attention of great physicists for more than a century. Mainly because of the importance of radiation-matter interaction, which is fundamental to the understanding of many problems in quantum physics. In this talk I'll present the current status on the field, particularly of the problem related to time-dependent interactions and what we have learnt from it, from a time-dependent process point of view to a chronological analysis of the problems. The talk will focus on results for the stopping power cross section, the differential cross section (total and charge exchange), the role of the projectile electronic structure, and the trajectory effect of the projectile. The results are presented for systems of interest in astrophysics and aeronomy up to material sciences and biophysics. I'll conclude with its application to laser assisted collisions and the future of this interesting field of research.

Note: The traditional student-speaker chat will begin in Physical Sciences Room 147 at 3.00 PM. All students are welcome! Refreshments will be served.

Oklahoma State Physics Department

Seminars and Colloquia, August 29-September 2, 2005

Second Week of Classes

Physics Colloquium:

Abstract:

Rayleigh diffraction limit for resolution is not fundamental and hinges on the use of a particular optical setup. Several classical optical techniques, such as monitoring the evanescent fields, allow resolution beyond the diffraction limit, however, by a small factor. Recently several quantum tricks have emerged allowing extreme subwavelength resolution in detecting position of an atom. Moreover, use of special entangled photon states in interferometric measurement and lithographic schemes has been recently shown to impart subwavelength resolution. Both these areas of frontier superresolution research will be introduced. In this context, a natural question arises: Is there an ultimate limit to resolution? The talk essentially aims at answering this question.

Note: The traditional student-speaker chat will begin in Physical Sciences Room 147 at 3.00 PM. All students are welcome! Refreshments will be served.

Oklahoma State Physics Department

Seminars and Colloquia, September 5-9, 2005

Oklahoma High Energy Physics Seminar on Talk-Back Television:

Physics Colloquium:

Abstract:

It is now widely known that the fundamental properties of a medium like dispersion and absorption can be manipulated by using appropriate coherent fields. This manipulation leads to distortionless propagation of pulse as low as few m/s. The idea of slow light can be successfully implemented for storage of light in an atomic medium which can later be retrieved on demand. Furthermore, the coherent control fields can also produce superluminal propagation of light pulses. The causality of propagation of pulses in a nonlinear medium is confirmed. In this talk many of the experiments and several possible applications of slow light will be reviewed.

Note: The traditional student-speaker chat will begin in Physical Sciences Room 147 at 3.00 PM. All students are welcome! Refreshments will be served.

Oklahoma NanoNet Informal Seminar:

Abstract:

We report results for the electronic structures of extended silver single-wall nanotubes (AgSWNTs) within a first-principles, all-electron self-consistent local density functional approach (LDF) adapted for helical symmetry. We carried out calculations on twenty-one different AgSWNTs ranging in radii from approximately 1.3 Å to 3.6 Å. AgSWNTs with radii greater than 2.2 Å were also calculated with a silver atomic chain inserted along the nanotube axis; we refer to these composite structures as silver nanowires (AgNWs). Energetic trends for the AgSWNTs are not as predictable as expected. For example, the total energy does not necessarily decrease as nanotube radius increases, as is the case for single-wall carbon nanotubes. The conductivity of these AgSWNTs and AgNWs is also addressed. Similar to the case for helical gold nanowires, the number of conduction channels in the AgSWNTs does not always correspond to the number of atom rows comprising the nanotube. However, for all AgNWs considered, the additional silver atomic chain placed along the tube’s axis contributes one additional conduction channel.

Oklahoma State Physics Department

Seminars and Colloquia, September 12-16, 2005

Oklahoma High Energy Physics Seminar on Talk-Back Television:

Physics Colloquium:

Abstract:

The discovery of carbon nanotubes (CNT) by Ijima and co-workers [1] and subsequent studies of the unique mechanical and electronic properties of single-wall carbon nanotubes (SWNT) attracted much interest due to their potential in nano electronic device applications. Their usefulness, however, depends critically on the ability to control the electronic, and in particular, conducting properties of CNTs. Recent experiments by Zhao et al. [2] provided an evidence for the formation of carbon nanowires (CNW), a new type of nanostructures, by encapsulating long linear carbon chain (C-chain) coaxially and parallel to the SWNT axis. Their experiments revealed that the interlayer spacing of the CNW is about 3.4 Å which is approximately equal to the experimental interlayer spacing of graphene. Zhao et al. [1] also simulated the electronic band structures of (5,5) CNWs constructed by inserting C-chain inside (5,5) SWNT. Their calculations indicate potential improvement in conductivity of CNW through increase in the local density of states (DOS). We extended these simulations, using local density functional approach, to study the stability and electronic band structures of CNWs constructed from both metallic and semiconducting SWNTs. The results of our calculations will be presented along with their implications and future directions.

1. S. Ijima, Nature 354, 56 (1991); S. Ijima and T. Ichihashi, Nature 363, 603 (1993)
2. X. Zhao, Y. Ando, Y. Liu, M. Jinno and T. Suzuki, Phys. Rev. Lett. 90, 187401 (2003)

Note: The traditional student-speaker chat will begin in Physical Sciences Room 147 at 3.00 PM. All students are welcome! Refreshments will be served.

Oklahoma NanoNet Seminar:

Abstract:

Nanoscale materials often show unique and superior physical, chemical, and tribological properties. The promise of nanotechnology is fulfilled when these unique properties are translated into dimensions that devices can use. A significant step towards this goal is the hierarchical assembly of nanoscale building blocks into controlled macroscopic structures. Self-assembly, an approach that utilizes non-covalent interactions to organize building blocks into hierarchical structure, has emerged as a most promising approach. This presentation will address the design, synthesis and device applications of nanostructured materials fabricated by static or responsive self-assembly, including the following main topics:

1. Design and fabrication of functional mesostructured materials using molecular building blocks,
2. Fabrication of macroscopic metallic and semiconductor nanowire thin films for fuel cells, thermoelectric, hydrogen separation, high surface area electrodes, magnetic materials, photovoltaics, sensors, and other applications, and
3. Adaptive responsive artificial systems, such as molecular chameleons, through dynamic assembly of functional molecular building blocks.

Oklahoma State Physics Department

Seminars and Colloquia, September 19-23, 2005

Joint Chemistry and Physics Seminar:

Abstract:

In its current state vibrational spectroscopy has developed to the point where complex analyses are routine, even for the non-specialist. Within the arsenal of the average analyst capabilities for hyperspectral imaging and sophisticated data analysis techniques are standard. This talk will address such issues as routine and advanced chemical imaging and hyperspectral mapping techniques. A discussion of a technique for calibrationless quantitative analysis using advanced imaging will also be presented. A variety of new imaging applications will be presented.

A more open session will touch on aspects of how vibrational spectroscopy may develop as it relates to cutting edge fields of analysis including: proteomics and biotechnology (fermentation, genetic engineering), biomedical applications, nanotechnology, MEMS, Homeland Security, dedicated sensors, label-free detection, immunolabel detection molecules, quantum dots, microfluidics, hyphenated spectroscopy, data fusion, 2-D correlation spectroscopy, multi-order spectroscopy, Terahertz spectroscopy, phase boundary measurements, resonance Raman, AI, SERS, and SPR. Surface science, single molecule science, polymorph generation, microreactors, micro-arrays, and more are all part of the new applications of molecular spectroscopy.

Note: Refreshments at 3:00 PM in Room PS 117.

Oklahoma NanoNet Seminar:

Abstract:

Single crystal copper is of considerable interest to many industrial applications. It is, therefore, very important to know the material behavior on a macroscale as well as microscale. In this research, finite element simulation of the nanoindentation of single-crystal copper was conducted using meso-plasticity constitutive model. Meso-plasticity theory was employed to investigate the region under nanoindentation where the dislocations are formed and emitted. The meso-plasticity theory was implemented into FEM using ABAQUS/Explicit. An ABAQUS user subroutine VUMAT was developed and examined by indentation test. The co-rotational stress rate and the rate dependent power-law expression for the shear strain rate were employed.

Using the finite element analysis incorporating the meso-plasticity constitutive model, the nanoindentation process was simulated on different crystallographic surfaces of single crystal copper, namely (100), (011) and (111) surfaces. At an indentation depth of 300 nm using a spherical indenter, considerable pile-up formation was observed in all three cases. The pile-up topography shows four-fold, two-fold, three-fold symmetry, respectively. The exhibited symmetry characteristics of the surfaces coincide with the experimental observations available in literature for single crystal copper. The mechanism of surface pattern formation has been discussed based on the mesoplasticity theory of slip systems in the crystal. Moreover, the magnitude of the pile-up value after indentation shows a strong dependence on crystallographic orientation. Additionally, the shear strain, which results from the dislocation motion, is concentrated directly underneath the indenter and the distributions present the symmetric and asymmetric patterns depending on the orientation of the crystal. Under the nanoindentation loading along different crystallographic directions, the deformation behavior of single crystal copper has been explored to characterize the material properties at microscale.

Note: Our speaker is a graduate student working with Dr. Ranga Komanduri and Dr. Hongbing Lu.

Oklahoma State Physics Department

Seminars and Colloquia, September 26-30, 2005

Joint Chemistry, Physics & OSU NanoNet Colloquium:

Abstract:

Recent developments in the areas of fabrication, optical characterization, and applications of a selected class of chemically assembled nanomaterials, namely gold and silver nanoparticles deposited onto optically transparent glass substrates; thiol functionalized self assembled monolayers, chemically stabilized gold and silver nanoparticles (monolayer protected clusters, MPCs) and MPCs linked to metallic substrates and adsorbates will be discussed. Six linear optical techniques for the characterization of these materials are considered: transmission localized surface plasmon resonance spectroscopy, T-LSPR; propagating surface plasmon resonance spectroscopy, P-SPR; polarization-selective Fourier transform infrared reflection absorption spectroscopy, PS-FTIRRAS; polarization-modulation Fourier transform infrared reflection absorption spectroscopy, PM-FTIRRAS; surface-enhanced infrared reflection absorption spectroscopy, SEIRRAS; and infrared ellipsometry. This presentation focuses particularly on providing a unified treatment of these six optical techniques using a relatively simple stratified multilayer model.

Note: Refreshments at 3:00 PM in Room PS 147.

Remark: Dr. Fendler was Nicholas Kotov's postdoctoral mentor.

Oklahoma State Physics Department

Seminars and Colloquia, October 3-7, 2005

Physics Colloquium:

Abstract:

For better or for worse, the structure of DNA can be disrupted by simple lesions. The processes considered in this lecture include electron attachment, hydrogen atom removal, and deprotonation. These processes can be modeled using finite representations of the DNA structure. Although our theoretical methods are most applicable to experimental studies of biomolecules in the gas phase, this research points toward eventual ichemical applications.

Note: The traditional student-speaker chat will begin in Physical Sciences Room 147 at 3.00 PM. All students are welcome! Refreshments will be served.

Remark: Professor Schaefer will give three additional public lectures in the Veritas Forum series:

1. The Big Bang, Stephen Hawking, and God, Seretean Concert Hall, Tuesday, October 4, 7:00–8:30 PM.
2. Quantum Mechanics, Postmodernism and God, Little Theater, Student Union, Wednesday, October 4, 2:30–4:00 PM.
3. Scientists and Their Gods, Little Theater, Student Union, Wednesday, October 4, 7:00–8:30 PM.

Oklahoma High Energy Physics Seminar on Talk-Back Television:

Oklahoma State Physics Department

Seminars and Colloquia, October 10-14, 2005

Oklahoma High Energy Physics Seminar on Talk-Back Television:

Physics Colloquium:

Abstract:

The Big Bang and its inflationary extension provide fascinating windows into very high energy physics and into the physics of fundamental particles. I will describe how the three observational pillars of the Big Bang model (the Hubble expansion, the cosmic microwave background and the light element abundances) can be used to constrain inflationary models (which often find their roots in particle physics) and deviations from the neutrino sector of the Standard Model of particle physics.

Note: The traditional student-speaker chat will begin in Physical Sciences Room 147 at 3.00 PM. All students are welcome! Refreshments will be served.

Oklahoma State Physics Department

Seminars and Colloquia, October 17-21, 2005

Fall Break Monday-Tuesday

Oklahoma NanoNet Seminar:

Abstract:

Ultraprecision finishing of the II-VI semiconductors, some of which have applications in infrared optics (CdS, ZnSe) and as potential substrates for short wavelength light emitters (ZnO, ZnSe), poses particular challenges due to the unique chemical and structural properties of these materials. Studies of their ultrafine surface finishing have demonstrated the achievement of superior surface finish and form accuracy. However, subsurface lattice disorder introduced by finishing is known to persist and may pose severe limitations on both surface performance and, for substrate applications, suitability for subsequent epitaxial growth. The use of Rutherford backscattering in the channeling configuration to investigate the amount and distribution of subsurface damage introduced to ultrafinely finished bulk II-VI crystals is discussed. Results obtained for the amount of lattice disorder and the damage depth for selected surfaces are compared to cross-sectional transmission electron microscopy (XTEM) observations of these surfaces. Recent results on the use of nanoindentation to investigate near surface changes caused by surface preparation are also presented.

Oklahoma State Physics Department

Seminars and Colloquia, October 24-28, 2005

Oklahoma High Energy Physics Seminar on Talk-Back Television:

Physics Colloquium:

Abstract:

Recent progress in cooling atomic Fermi gases has highlighted their potential to realize some of the paradigm models of condensed matter physics. Many of the parameters of trapped atomic gases, including their density, temperature, and interaction strength and sign, can all be controlled with high precision, making them particularly useful for exploration of basic many-body phenomena.

I will discuss the cooling an atomic Fermi gas of ⁶Li atoms to quantum degeneracy and the realization of a strongly interacting Fermi gas by use of a magnetically-tunable collisional “Feshbach” resonance. We have created a Bose-Einstein condensate (BEC) of atomic pairs and have used the condensate as a starting point to explore the BEC/BCS crossover that occurs at the Feshbach resonance. Optical molecular spectroscopy was used to measure the local pair correlations in both the BEC and the BCS regimes. This technique provides quantitative measurements of the microscopic physics of the Feshbach-induced pairs.

Note: The traditional student-speaker chat will begin in Physical Sciences Room 147 at 3.00 PM. All students are welcome! Refreshments will be served.

Special Physics Seminar:

Abstract:

The ability to control the special properties and the spontaneous emission lifetimes of atoms and ions is of vital importance in the fabrication of the photonic devices. Rare-earth doped glasses have been at the forefront of the telecommunications revolution. We report here the experimental results on the variation of the radiative lifetime of Eu³⁺ ion embedded in a dielectric with the refractive index n. We dope 1 mol% of Eu³⁺ into the binary glass system x PbO – (1−x) B₂O₃. By varying x we have achieved a fairly large variation of the refractive index from 1.7 to 2.2. This enables us to study the local field effects for the first time for ions doped in a solid glassy material. Our measurements are in agreement with the so called real cavity model. We also report the measurements of the modification of the spontaneous emission rates due to an absorbing medium.

Oklahoma State Physics Department

Seminars and Colloquia, October 31-November 4, 2005

Oklahoma High Energy Physics Seminar on Talk-Back Television:

Physics Colloquium:

Abstract:

Proton beams exhibit a sharp increase in the rate of dose deposition toward the end of their range, known as the Bragg peak. The sharp fall-off of delivered dose both laterally and along the beam direction in the Bragg peak region leads to the ability to deliver highly localized doses to a tumor while sparing surrounding healthy tissue in the patient. This represents a great advantage for proton beams over conventional photon and electron beams, as well as, intensity-modulated photon beams in radiotherapy. This has led to the development of proton beam radiotherapy, since it was first suggested in 1942, into a viable radiotherapy treatment option whose use today is rapidly growing worldwide. This seminar is focused on the basics of proton therapy. This includes an overview of the basic interactions of proton beams with matter and a description of the “passive scattering” and “beam scanning” proton therapy treatment methods. The use of proton therapy for nasal sinus tumor, pediatric brain tumor, and lung tumor cases will be shown demonstrating the sparring of healthy tissue in comparison to photon beam irradiation. Finally, a brief overview will be given of the new M. D. Anderson Proton Therapy Center.

Note: The traditional student-speaker chat will begin in Physical Sciences Room 147 at 3.00 PM. All students are welcome! Refreshments will be served.

Special Physics Seminar:

Abstract:

The Martian Radiation Environment Experiment (MARIE) aboard 2001 Mars Odyssey operated successfully for 18 months but failed in the large solar proton events of Halloween 2003. Other instruments on the spacecraft have allowed us to continue monitoring both GCR and Solar Particle Events at Mars. The original concept of the Odyssey mission was to look for water at Mars, and the instrument suite designed for that purpose includes a Gamma-Ray Spectrometer (GRS), a Neutron Spectrometer (NS), and a High-Energy Neutron Detector (HEND). In addition to mapping the planet in gamma rays and neutrons, all of these instruments are also sensitive to energetic charged particles. The GRS provides a particularly useful channel for measuring the GCR and moderate solar events. In more intense solar events, the HEND counters—which record “background” neutrons produced in the spacecraft by incident charged particles—become useful as a substantial neutron flux is induced. Although little or no spectral data can be obtained from these instruments, total fluxes can be accurately determined using a simple normalization constant to convert GRS counts to flux. These data clearly show an increase in the GCR flux starting in 2004, consistent with data from near-Earth satellites showing the expected effect of solar modulation as solar minimum approaches. Using the latest version of the Badhwar–O’Neill GCR model, the average LET and quality factor can be obtained and the total measured flux can be expressed as a dose rate and a dose-equivalent rate. These results can be compared with the similar results obtained from instruments both inside and outside the ISS.

Oklahoma State Physics Department

Seminars and Colloquia, November 7-11, 2005

Oklahoma High Energy Physics Seminar on Talk-Back Television:

Physics Colloquium:

Abstract:

Proteins are the most abundant macromolecules in living cells. They are complex and dynamic, responsible for variety of essential cell functions, ranging from energy conversion to disease fighting. More than a million of different proteins have been identified from bacteria, plants and animals through genomic studies. In this post-genome era, one of the major challenges in biology is to understand the functionality of complex protein systems. Physics and chemistry are expected to play an essential role in such an endeavor. This field is rapidly growing in recent years, offering new career opportunities to both physicists and chemists, particularly to young graduate students, as well as offering new development opportunities to physics and chemistry departments nationwide and worldwide.

In my lab, we study the structure-function relationship of photoreceptor proteins using a variety of laser spectroscopic techniques and computational methods. Photoreceptor proteins are excellent model systems of proteins due to their light triggered nature, which can be achieved as fast as sub-picoseconds. Once a protein molecule is set to work by absorption of one photon (from a pulsed, tunable laser), we “watch” how this protein performs its functional task through a series of “body movements”. This is accomplished by using state-of-the-art time-resolved Fourier transform infrared spectroscopy in mid-infrared. In addition, we employ quantum computational methods to study the structure, energy, charge distribution, and hydrogen bonding interactions in active sites of proteins. In my talk I will present our experimental and computational studies of a special photo-receptor protein (“hydrogen atom” of proteins) for bacterial light-sensing, our efforts to push the experimental limits, and our journey to explore the underlying principles in the functionality of proteins.

Note: The traditional student-speaker chat will begin in Physical Sciences Room 147 at 3.00 PM. All students are welcome! Refreshments will be served.

Oklahoma State Physics Department

Seminars and Colloquia, November 14-18, 2005

Physics Colloquium:

Postponed due to problems with airplane.

Oklahoma State Physics Department

Seminars and Colloquia, November 21-25, 2005

Special Physics Seminar:

Abstract:

The language of conditional measurements provides powerful conceptual tools for unraveling and understanding nonclassical features of quantum dynamics. This talk will explore the connection between quantum dynamics and photon fluctuations emphasizing the recent work on conditional measurements of intensity and field quadrature fluctuations within the context of optical parametric oscillators. We show that the nonclassical effects in these measurements are a manifestation of enhanced and phased quantum fluctuations of the field following a first photo-detection and reveal the wave-particle duality of photons.

Thanksgiving

Oklahoma State Physics Department

Seminars and Colloquia, November 28-December 2, 2005

Oklahoma High Energy Physics Seminar on Talk-Back Television:

Physics Colloquium:

Abstract:

After a basic introduction to the principles of experimental particle physics three compelling lines of research are described. The origin of fermion masses, higher symmetries, and hidden dimensions may all be within reach of current and future accelerators.

Note: The traditional student-speaker chat will begin in Physical Sciences Room 147 at 3.00 PM. All students are welcome! Refreshments will be served.

Oklahoma State Physics Department

Seminars and Colloquia, December 5-9, 2005

Prefinals Week

Oklahoma High Energy Physics Seminar on Talk-Back Television:

Physics Colloquium:

Abstract:

A brief discussion on the use of protons and antiprotons for the treatment of cancer and other diseases with emphasis on employment of the proton/antiproton annihilation event. Includes a very brief overview of the scientific hurdles, financial considerations, and social consequences of the program. The program includes the construction of a 25-30 GEV ‘antiproton factory’, trapping technologies and transportation of antiprotons to treatment centers.

Note: Refreshments for attendees will be served in Physical Sciences Room 147 at 3.00 PM.

Oklahoma State Physics Department

Seminars and Colloquia, December 12-16, 2005

Finals Week

No talks scheduled

Oklahoma State Physics Department

Seminars and Colloquia, December 19-23, 2005

No talks scheduled

Oklahoma State Physics Department

Seminars and Colloquia, December 26-30, 2005

No talks scheduled

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This page was prepared by Helen Au-Yang and Jacques H.H. Perk.