arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2203.02524hep-th
收藏

全息术中的非厄米量子猝灭

Non-Hermitian Quantum Quenches in Holography

Sergio Morales-Tejera, Karl Landsteiner

摘要:

非厄米PT对称量子理论的概念最近被推广到规范/引力对偶。我们研究这种非厄米全息场论的演化时,特别强调的问题,非酉时间与酉时间演化的耦合随时间变化。我们表明,在对偶量子理论中的非幺正时间演化对应于在渐近AdS时空的大部分中违反能量守恒条件(NEC)。我们发现,在改变非厄米耦合的体积AdS黑洞的视界收缩。另一方面,在存在恒定的非厄米特耦合的情况下改变厄米特耦合仍然违反NEC,但导致增长的视界。通过引入非厄米规范场,可以使时间演化成为幺正的,即服从体元的NEC,并给出完全等价的纯厄米描述.

英文摘要:

The notion of non-Hermitian PT symmetric quantum theory has recently been generalized to the gauge/gravity duality. We study the evolution of such non-Hermitian holographic field theories when the couplings are varied with time with particular emphasis on the question non-unitary time vs. unitary time evolution. We show that a non-unitary time evolution in the dual quantum theory corresponds to a violation of the Null Energy Condition (NEC) in the bulk of the asymptotically AdS spacetime. We find that upon varying the non-Hermitian coupling the horizon of a bulk AdS black hole shrinks. On the other hand varying the Hermitian coupling in the presence of a constant non-Hermitian coupling still violates the NEC but results in a growing horizon. We also show that by introducing a non-Hermitian gauge field the time evolution can be made unitary, e.g. the NEC in the bulk is obeyed, and an exactly equivalent purely Hermitian description can be given.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑