Selective Transient Cooling by Impulse Perturbations in a Simple Toy Model.
Selective Transient Cooling by Impulse Perturbations in a Simple Toy Model.
复制标题
简单玩具模型中脉冲扰动的选择性瞬态冷却。
DOI：
10.1103/physrevlett.120.220601
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发表时间：
2018
影响因子：
8.6
通讯作者：
M. Fabrizio
中科院分区：
文献类型：
--
作者：
M. Fabrizio
我们在一个简单的完全可解的玩具模型中表明，适当设计的脉冲扰动可以暂时冷却低能量的自由度，而牺牲高能量的自由度。该模型由两个无限程量子伊辛模型组成：一个是高能区，其横场比另一个低能区大得多。有限持续时间的扰动是一个自旋交换耦合的两个伊辛模型的振荡耦合强度。我们发现一个冷却的低能量部门，优化的振荡频率与自旋交换激发共振。在微扰被关闭后，具有低横场的伊辛模型甚至可以发展出自发对称性破缺，尽管最初高于临界温度。
We show in a simple exactly solvable toy model that a properly designed impulse perturbation can transiently cool down low-energy degrees of freedom at the expense of high-energy ones that heat up. The model consists of two infinite-range quantum Ising models: one, the high-energy sector, with a transverse field much bigger than the other, the low-energy sector. The finite-duration perturbation is a spin exchange that couples the two Ising models with an oscillating coupling strength. We find a cooling of the low-energy sector that is optimized by the oscillation frequency in resonance with the spin exchange excitation. After the perturbation is turned off, the Ising model with a low transverse field can even develop a spontaneous symmetry breaking despite being initially above the critical temperature.
影响因子：
2.9
作者：
Bernier, Jean-Sebastien;Kollath, Corinna;Koehl, Michael
通讯作者：
Koehl, Michael
影响因子：
64.8
作者：
Mitrano M;Cantaluppi A;Nicoletti D;Kaiser S;Perucchi A;Lupi S;Di Pietro P;Pontiroli D;Riccò M;Clark SR;Jaksch D;Cavalleri A
通讯作者：
Cavalleri A
影响因子：
44.1
作者：
Basov, D. N.;Averitt, Richard D.;Haule, Kristjan
通讯作者：
Haule, Kristjan