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Below are reprints and preprints of our work on laser cooling and trapping of atoms, quantum computing, and spin-exchange optical pumping. |
| Dissertations & Masters Theses | |
| Erich Urban, Coherent Manipulation of Single Atom Qubits Using Rydberg States, 2009 | |
| E. G. Brekke, Stimulated Emission Studies of Ultracold Rydberg Atoms, 2009 | |
| J. O. Day, Progress Towards the Creation of an On-Demand Single Photon Source Using Rydberg Atoms, 2008 | |
| E. D. Babcock, Spin-Exchange Optical Pumping with Alkali-Metal Vapors, 2005 | |
| J. S. Sebby, Demonstration of Dense Mesoscopic Atomic Clouds in a Holographic Atom Trap, 2004 | |
| B. Chann, Studies of Spin-Exchange Optical Pumping, 2003 | |
| R. T. R. Newell, Cold and Dense Clouds of Atoms in a Holographic Atom Trap, 2003 | |
| I. A. Nelson, Physics of Practical Spin-Exchange Optical Pumping, 2001 | |
| S. J. Kadlecek, Spin Relaxation in Alkali Vapors, 1999 | |
| R. C. Nesnidal, Ultracold Collision Measurements in Low Intensity Magneto-Optical Traps, 1999 | |
| R. T. Newell, A Portable Magneto-Optical Trap, 1998 | |
| R. S. Williamson, III, Magneto-Optical Trapping of Potassium Isotopes, 1997 | |
| Laser cooling and trapping of atoms | |
Observation
of Rydberg blockade between two atoms |
E. Urban, T. A. Johnson, T. Henage, L. Isenhower, D. D. Yavuz, T. G. Walker, and M. Saffman, Nature Phys. 5, 110-114 (2009). |
| Four-wave
mixing in ultracold atoms using intermediate Rydberg states |
E. Brekke, J. O. Day, and T. G. Walker, Phys. Rev. A 78, 063830 (2008). |
| Dynamics
of low-density ultracold Rydberg gases |
J. O. Day, E. Brekke, and T. G. Walker, Phys. Rev. A 77, 052712 (2008). |
| Consequences of Zeeman
degeneracy for the van der Waals blockade between Rydberg atoms |
Thad G. Walker and M. Saffman, Phys. Rev. A 77, 032723 (2008). |
| Rabi oscillations
beetween ground and Rydberg states with dipole-dipole atomic interactions |
T. A. Johnson, E. Urban, T. Henage, L. Isenhower, D. D. Yavuz, T. G. Walker, and M. Saffman, Phys. Rev. Lett. 100, 113003 (2008). |
| Optical
forces on particles of arbitrary shape and size |
Douglas Bonessi, Keith Bonin, and Thad Walker, J. Opt. A: Pure Appl. Opt. 9, S228-S234 (2007). |
| Fast
ground state manipulation of neutral atoms in microscopic optical
traps |
D. D. Yavuz, P. B. Kulatunga, E. Urban, T. A. Johnson, N. Proite, T. Henage, T. G. Walker, and M. Saffman, Phys. Rev. Lett. 96, 063001 (2006). |
| Analysis of a quantum logic device based on dipole-dipole interactions of optically trapped Rydberg atoms | M. Saffman and T. G. Walker, Phys. Rev. A 72, 022347 (2005). |
| High-density mesoscopic atom clouds in a holographic atom trap | J. Sebby-Strabley, R. T. R. Newell, J. O. Day, E. Brekke, and T. G. Walker, Phys. Rev. A 71, 021401 (2005). |
| Zeroes of Rydberg-Rydberg Foster interactions | Thad G. Walker and Mark Saffman, J. Phys. B: At. Mol. Opt. Phys. 38, S309-S319 (2005). |
| Dense Atom Clouds in a Holographic Atom Trap | R. Newell, J. Sebby, and T. G. Walker, Opt. Lett. 28, 1266 (2003). |
| Creating single atom and single photon sources from entangled atomic ensembles | M. Saffman and T. G. Walker, Phys. Rev. A 66, 065403 (2002). |
| Nondestructive spatial heterodyne imaging of cold atoms | S. Kadlecek, J. Sebby, R. Newell, and T. G. Walker, Opt. Lett. 26, 137 (2001). |
| Light-Induced Ultracold Spin-Exchange Collisions | Renee C. Nesnidal and Thad G. Walker, Phys. Rev. A 62, 030701 (2000). |
| Role of spontaneous emission in ultracold two-color optical collisions | C. I. Sukenik and T. Walker, Phys. Rev. A 59, 889 (1999). |
| A magneto-optical trap loaded from a pyramidal funnel | R. S. Williamson, P. A. Voytas, R. T. Newell, and T. Walker, Optics Express 3, 111 (1998). |
| Elastic and inelastic collisions of cold spin-polarized 133Cs atoms | P. J. Leo, E. Tiesinga, P. S. Julienne, D. K. Walter, S. Kadlecek, and T. G. Walker, Phys. Rev. Lett. 81, 1389 (1998). |
| Low saturation intensities in two-photon ultracold collisions | C. I. Sukenik, D. Hoffmann, S. Bali, and T. G. Walker, Phys. Rev. Lett. 81, 782 (1998). |
| Absolute Electron-Impact Ionization Cross Section Measurements Using a Magneto-Optical Trap | R. S. Shappe, T. G. Walker, L. W. Anderson, and Chun C. Lin, Phys. Rev. Lett. 76, 4328 (1996). |
| Trap-Depth Measurements Using Ultracold Collisions | D. Hoffmann, S. Bali, and T. G. Walker, Phys. Rev. A 54, 1030 (1996). |
| Multilayer Dielectric Structure for Enhancement of Evanescent Waves | R. C. Nesnidal and T. G. Walker, Applied Optics 35, 2226 (1996). |
| Measurements of Intensity Correlations of Scattered Light from Laser-Cooled Atoms | S. Bali, D. Hoffmann, J. Siman, and T. G. Walker, Phys. Rev. A 53, 3469 (1996). |
| Magneto-optical trapping and ultracold collisions of potassium atoms | R. S. Williamson and T. G. Walker, Journal of the Optical Society of America B 12, 1393 (1995). |
| Electron Collision Cross-Sections Measured with the Use of a Magneto-Optical Trap | R. S. Schappe, P. Feng, L. W. Anderson, C. C. Lin, and T. G. Walker, Europhysics Lett. 29, 439 (1995). |
| Novel Intensity Dependence of Ultracold Collisions Involving Repulsive States | S. Bali, D. Hoffmann, and T. G. Walker, Europhysics Letters 27, 273 (1994). |
| Inexpensive diode laser microwave modulation for atom trapping | P. Feng and T. G. Walker, Am. J. Phys. 63, 905 (1995). |
| Measurements of Rb Trap-loss Collision Spectra | D. Hoffmann, P. Feng, and T. G. Walker, Journal of the Optical Society of America B 11, 712 (1994). |
| Laser-Induced Ultracold Rb(5S1/2) + Rb(5P1/2) Collisions | M. G. Peters, D. Hoffmann, J. D. Tobiason, and T. G. Walker, Phys. Rev. A 50, 906 (1994). |
| Effects of Hyperfine Structure on Alkali Trap-Loss Collisions | T. G. Walker and D. Pritchard, Laser Physics 4, 1085 (1994). |
| Three-Dimensional Analytical Calculation of the Magneto-Optical Trapping Forces on a StationaryJ = 0 - J = 1 Atom | T. G. Walker, Laser Physics 4, 965 (1994). |
| Comparison of Trap-Loss Collision Spectra for 85Rb and 87Rb | Paul Feng, Dominikus Hoffmann, and Thad Walker, Phys. Rev. A 47, R3495 (1993). |
| Measurements of Collisions Between Laser-Cooled Atoms (Review Paper--sorry, no PDF file) | T. G. Walker and P. Feng, Advances in Atomic, Molecular, and Optical Physics 34, 125 (1993). |
| Spin-Polarized Spontaneous-Force Atom Trap | T. G. Walker, P. Feng, D. Hoffmann, and R. S. Williamson, Phys. Rev. Lett. 69, 2168 (1992). |
| Excited-State Collisions of Trapped 85Rb Atoms | D. Hoffmann, P. Feng, R. S. Williamson, and T. G. Walker, Phys. Rev. Lett. 69, 753 (1992). |
| A Vortex-Force Atom Trap | D. Hoffmann, P. Feng, R. S. Williamson, and T. G. Walker, Phys. Lett. A 163, 309 (1992). |
| Spin-Exchange Optical Pumping | |
| Neutron
beam effects on spin-exchange-polarized 3He |
M. Sharma, E. Babcock, K. H. Andersen, L. Barron-Palos, M. Becker, S. Boag, W. C. Chen, T. E. Chupp, A. Danagoulian, T. R. Gentile, A. Klein, S. Penttilla, A. Petoukhov, T. Soldner, E. R. Tardiff, T. G. Walker, and W. S. Wilburn, Phys. Rev. Lett. 101, 083002 (2008). |
| Spin-exchange
optical pumping of 3He with Rb-K mixtures and pure K |
W. C. Chen, T. R. Gentile, T. G. Walker, and E. Babcock, Phys. Rev. A 75, 013416 (2007). |
| Parametric
modulation of an atomic magnetometer |
Zhimin Li, Ronald T. Wakai, and Thad Walker, Appl. Phys. Lett. 89, 134105 (2006). |
| Limits to the
polarization for spin-exchange optical pumping of 3He |
E. Babcock, B. Chann, T. G. Walker, W. C. Chen, and T. R. Gentile, Phys. Rev. Lett. 96, 083003 (2006). |
| 3He polarization-dependent EPR frequency shifts of alkali-metal 3He pairs | Earl Babcock, Ian A. Nelson, Steve Kadlecek, and Thad G. Walker, Phys. Rev. A 71, 013414 (2005). |
| Production of highly polarized 3He using spectrally narrowed diode laser array bars | B. Chann, E. Babcock, L. W. Anderson, T. G. Walker, W. C. Chen, T. B. Smith, A. K. Thompson, and T. R. Gentile, J. Appl. Phys. 94, 6908 (2003). |
| E. Babcock, I. A. Nelson, S. Kadlecek, B. Driehuys, L. W. Anderson, F. W. Hersman, and T. G. Walker, Phys. Rev. Lett. 91, 123003 (2003). | |
Skew Light Propagation in Optically Thick Optical Pumping Cells |
B. Chann, E. Babcock, L. W. Anderson, and T. G. Walker, Phys. Rev. A 66, 033406 (2002). |
| B. Chann, E. Babcock, L. W. Anderson, and T. G. Walker, Phys. Rev. A 66, 032703 (2002). | |
| B. Chann, I. A. Nelson, L. W. Anderson, B. Driehuys, and T. G. Walker, Phys. Rev. Lett. 88, 113201 (2002). | |
| I. A. Nelson and T. G. Walker, Phys. Rev. A 65, 012712 (2001). | |
| Spin relaxation in alkali-metal 1Sg+ dimers | S. Kadlecek, L. W. Anderson, C. J. Erickson, and T. G. Walker, Phys. Rev. A 64, 052717 (2001). |
| Faraday rotation density measurements of optically thick alkali metal vapors | E. Vliegen, S. Kadlecek, L. W. Anderson, T. G. Walker, C. J. Erickson, and W. Happer, Nuc. Inst. Methods Phys. Res. A 460, 444 (2001). |
| Spin-axis relaxation in spin-exchange collisions of alkali-metal atoms | S. Kadlecek, T. Walker, D. K. Walter, C. Erickson, and W. Happer, Phys. Rev. A 63, 052717 (2001). |
| B. Chann, I. Nelson, and T. G. Walker, Opt. Lett. 25, 1352 (2000). | |
Spin-Exchange Optical Pumping Using a Frequency-Narrowed High Power Diode Laser |
I. Nelson, B. Chann, and T. G. Walker, Appl. Phys. Lett. 76 , 1356 (2000). |
| Field Dependence of Spin Relaxation in a Dense Rb Vapor | S. Kadlecek, L. W. Anderson, and T. G. Walker, Phys. Rev. Lett. 80, 5512 (1998). |
| Estimates of the relative magnitudes of the isotropic and anisotropic magnetic dipole hyperfine interactions in alkali-metal-noble-gas systems | D. K. Walter, W. Happer, and T. G. Walker, Phys. Rev. A 58, 3642, (1998). |
| Measurement of K-K Spin Relaxation Cross Sections | S. Kadlecek, L. W. Anderson, and T. G. Walker, Nuclear Instruments and Methods 402, 208 (1998). |
| Spin-Rotation Interaction of Alkali-Metal-He Atom Pairs | J. H. Thywissen, W. Happer, and T. G. Walker, Phys. Rev. A 56, 2090 (1997). |
| Spin-exchange optical pumping of noble-gas nuclei | T. G. Walker and W. Happer, RMP. 69, 629 (1997). |
| Spin-exchange optical pumping of hydrogen and deuterium nuclei | L. W. Anderson and T. G. Walker, Nuclear Instruments and Methods A 357, 220 (1995). |
| Laser optical pumping of potassium in a high magnetic field using linearly polarized light | C. Martin, T. G. Walker, L. W. Anderson, and D. R. Swenson, Nuclear Instruments & Methods in Physics Research A 335, 233 (1993). |
| Consequences of spin-exchange collisions for polarized hydrogen and deuterium targets | L. W. Anderson and T. G. Walker, Phys. Rev. Lett. 71, 2346 (1993). |
| The effect of radiation trapping on a high field spin exchange optically pumped target | L. W. Anderson and T. G. Walker, Nuclear Instruments & Methods in Physics Research 316, 123 (1992). |
| Physics Education | |
| Holography Without Photography | T. G. Walker, Am. J. Phys. 67, 783 (1999). |
| Inexpensive diode laser microwave modulation for atom trapping | P. Feng and T. G. Walker, Am. J. Phys. 63, 905 (1995). |
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