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Absolute Frequency Measurement Of The 6d5/2 Level Of Neutral 133Cs Using Two-Photon Spectroscopy, M. T. Herd, E. C. Cook, William Williams
Absolute Frequency Measurement Of The 6d5/2 Level Of Neutral 133Cs Using Two-Photon Spectroscopy, M. T. Herd, E. C. Cook, William Williams
Physics: Faculty Publications
We report absolute frequency measurements on the 6D5/2 level of neutral 133Cs using sub-Doppler two-photon spectroscopy. The absolute center-of-gravity energy for the 6D5/2 level is determined to be 22 631.683 877(6) cm−1, a factor of 170 times improvement over the previous measurement from 1964 of 22 631.6863(10) cm−1. This measurement also corrects a 2.4σ discrepancy with the previously measured value. The hyperfine coefficients were found to be A = −4.629(14) and B = −0.10(15) MHz, which are consistent with previous results.
Absolute Frequency Measurement Of The Llevel Of Neutral Using Two-Photon Spectroscopy, M. T. Herd, E. C. Cook, William Williams
Absolute Frequency Measurement Of The Llevel Of Neutral Using Two-Photon Spectroscopy, M. T. Herd, E. C. Cook, William Williams
Physics: Faculty Publications
We report absolute frequency measurements on the level of neutral using sub-Doppler two-photon spectroscopy. The absolute center-of-gravity energy for the level is determined to be , a factor of 170 times improvement over the previous measurement from 1964 of . This measurement also corrects a discrepancy with the previously measured value. The hyperfine coefficients were found to be and , which are consistent with previous results.
Python Routines For Low Temperature Resistive Thermometry In Magnetic Fields, Nathanael Fortune, Scott T. Hannahs, Julia Frothingham
Python Routines For Low Temperature Resistive Thermometry In Magnetic Fields, Nathanael Fortune, Scott T. Hannahs, Julia Frothingham
Physics: Faculty Publications
No abstract provided.
Evolution Of Magnetic Field Induced Ordering In The Layered Quantum Heisenberg Triangular-Lattice Antiferromagnet Ba3 Cosb2 O9, Nathanael Alexander Fortune, Q. Huang, T. Hong, J. Ma, E. S. Choi, Scott T. Hannahs, Z. Y. Zhao, X. F. Sun, Y. Takano, H. D. Zhou
Evolution Of Magnetic Field Induced Ordering In The Layered Quantum Heisenberg Triangular-Lattice Antiferromagnet Ba3 Cosb2 O9, Nathanael Alexander Fortune, Q. Huang, T. Hong, J. Ma, E. S. Choi, Scott T. Hannahs, Z. Y. Zhao, X. F. Sun, Y. Takano, H. D. Zhou
Physics: Faculty Publications
Quantum fluctuations in the effective spin- 1/2 layered triangular-lattice quantum Heisenberg antiferromagnet Ba3CoSb2O9 lift the classical degeneracy of the antiferromagnetic ground state in magnetic field, producing a series of novel spin structures for magnetic fields applied within the crystallographic ab plane, including a celebrated collinear “up-up-down” spin ordering with magnetization equal to 1/3 of the saturation magnetization over an extended field range. Theoretically unresolved, however, are the effects of interlayer antiferromagnetic coupling and transverse magnetic fields on the ground states of this system. Additional magnetic field induced phase transitions are theoretically expected and in some …
Complex Langevin And Other Approaches To The Sign Problem In Quantum Many-Body Physics, Casey E. Berger, L. Rammelmüller, A. C. Loheac, F. Ehmann, J. Braun, J. E. Drut
Complex Langevin And Other Approaches To The Sign Problem In Quantum Many-Body Physics, Casey E. Berger, L. Rammelmüller, A. C. Loheac, F. Ehmann, J. Braun, J. E. Drut
Physics: Faculty Publications
We review the theory and applications of complex stochastic quantization to the quantum many-body problem. Along the way, we present a brief overview of a number of ideas that either ameliorate or in some cases altogether solve the sign problem, including the classic reweighting method, alternative Hubbard–Stratonovich transformations, dual variables (for bosons and fermions), Majorana fermions, density-of-states methods, imaginary asymmetry approaches, and Lefschetz thimbles. We discuss some aspects of the mathematical underpinnings of conventional stochastic quantization, provide a few pedagogical examples, and summarize open challenges and practical solutions for the complex case. Finally, we review the recent applications of complex …