Grüneisen parameters: Origin, identity, and quantum refrigeration
Grüneisen parameters: Origin, identity, and quantum refrigeration
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格吕奈森参数:起源、同一性和量子制冷
DOI:
10.1103/physrevresearch.2.043066
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发表时间:
2019-09
影响因子:
4.2
通讯作者:
Xi-Wen Guan
中科院分区:
文献类型:
--
作者:
Yi-Cong Yu;Shizhong Zhang;Xi-Wen Guan
In solid state physics, the Gruneisen parameter (GP), originally introduced in the study of the effect of changing the volume of a crystal lattice on its vibrational frequency, has been widely used to investigate the characteristic energy scales of systems with respect to the changes of external potentials. On the other hand, the GP is little investigated in a strongly interacting quantum gas systems. Here we report on our general results on the origin of GP, new identity and caloric effects in quantum gases of ultracold atoms. We prove that the symmetry of the dilute quantum gas systems leads to a simple identity among three different types of GPs, quantifying caloric effect induced respectively by variations of volume, magnetic field and interaction. Using exact Bethe ansatz solutions, we present a rigorous study of these different GPs and the quantum refrigeration in one-dimensional Bose and Femi gases. Based on the exact equations of states of these systems, we obtain analytic results for the singular behaviour of the GPs and the caloric effects at quantum criticality. We also predict the existence of the lowest temperature for cooling near a quantum phase transition. It turns out that the interaction ramp-up and -down in quantum gases provides a promising protocol of quantum refrigeration in addition to the usual adiabatic demagnetization cooling in solid state materials.
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影响因子:
2.3
作者:
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通讯作者:
F. D. Stacey
影响因子:
2.3
作者:
J. Shanker;K. Sunil;B. S. Sharma
通讯作者:
J. Shanker;K. Sunil;B. S. Sharma
DOI:
10.1017/cbo9780511755583.016
发表时间:
2008-09
期刊:
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影响因子:
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通讯作者:
C. Pethick;H. Smith
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影响因子:
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