Non-equilibrium thermodynamics of harmonically trapped bosons
Non-equilibrium thermodynamics of harmonically trapped bosons
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DOI：
10.1088/1367-2630/18/10/103035
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发表时间：
2016-10-21
影响因子：
3.3
通讯作者：
Paternostro, Mauro
中科院分区：
文献类型：
--
作者：
Angel Garcia-March, Miguel;Fogarty, Thomas;Paternostro, Mauro
我们将非平衡态量子热力学的框架应用于一维谐波阱中小尺寸玻色子量子气体的猝灭物理。我们证明了在淬灭后具有强相互作用的这些少体系统中可以发生动力正交性，并对无限排斥的原子对发现了动力正交性。我们进一步表明，这种现象与从谱函数决定动力学的基本激励有关。我们在系统所做的（不可逆的）功的数量和纠缠的建立之间建立了明确的定性联系。我们通过检查三个被困原子的情况，将我们的分析扩展到多部系统。我们看到初始（预淬火）相互作用在决定动力学特征方面起着至关重要的作用，而两粒子情况的定性特征似乎仍然有效。最后，我们建议使用原子密度分布作为所讨论的系统的非平衡性质的易于获取的指标。
Weapply the framework of non-equilibrium quantum thermodynamics to the physics of quenched small-sized bosonic quantum gases in a one-dimensional harmonic trap. We show that dynamical orthogonality can occur in these few-body systems with strong interactions after a quench and we find its occurrence analytically for an infinitely repulsive pair of atoms. We further show this phenomena is related to the fundamental excitations that dictate the dynamics from the spectral function. We establish a clear qualitative link between the amount of (irreversible) work performed on the system and the establishment of entanglement. We extend our analysis to multipartite systems by examining the case of three trapped atoms. Weshow the initial (pre-quench) interactions play a vital role in determining the dynamical features, while the qualitative features of the two particle case appear to remain valid. Finally, we propose the use of the atomic density profile as a readily accessible indicator of the non-equilibrium properties of the systems in question.