论文标题

热力学准确性的快捷方式

Shortcuts to thermodynamic quasistaticity

论文作者

Soriani, Artur, Miranda, Eduardo, Deffner, Sebastian, Bonança, Marcus V. S.

论文摘要

近期量子技术的运行需要开发可行,可实施和可靠的稳健策略来控制复杂的许多身体系统。为此,已经开发了各种所谓的“绝涂捷径”的技术。在不同的情况下,这些快捷方式中的许多已被证明是有力且可实施的。但是,通常也希望拥有适用于大型系统的其他近似策略。在这项工作中,我们从热力学中汲取灵感,并提议专注于宏观盐而不是微晶格。然后可以将绝热动态确定为保留状态方程的此类过程,并从绝热扰动理论获得系统的校正。我们通过改善快速的绝热驾驶,并将该方法应用于横向场中的量子链,从而证明了这种方法。

The operation of near-term quantum technologies requires the development of feasible, implementable, and robust strategies of controlling complex many body systems. To this end, a variety of techniques, so-called "shortcuts to adiabaticty", have been developed. Many of these shortcuts have already been demonstrated to be powerful and implementable in distinct scenarios. Yet, it is often also desirable to have additional, approximate strategies available, that are applicable to a large class of systems. In this work, we hence take inspiration from thermodynamics and propose to focus on the macrostate, rather than the microstate. Adiabatic dynamics can then be identified as such processes that preserve the equation of state, and systematic corrections are obtained from adiabatic perturbation theory. We demonstrate this approach by improving upon fast quasiadiabatic driving, and by applying the method to the quantum Ising chain in the transverse field.

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