Non-Hermitian dynamics in the quantum Zeno limit
Non-Hermitian dynamics in the quantum Zeno limit
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DOI：
10.1103/physreva.94.012123
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发表时间：
2015-10
影响因子：
2.9
通讯作者：
W. Kozlowski;S. Caballero-Benitez;I. Mekhov
中科院分区：
文献类型：
--
作者：
W. Kozlowski;S. Caballero-Benitez;I. Mekhov
我们表明，弱测量导致非常规的量子芝诺动力学与拉曼通过芝诺子空间外的虚态的过渡。我们扩展这个概念到非厄米动力学领域的测量和系统自身的动态之间的随机竞争，可以描述一个非厄米哈密顿。我们得到一个解决方案，在晶格中的超冷玻色子，并表明，暗态的隧穿实现作为一个稳定的状态，其中可观察的波动是零和隧穿抑制破坏性的物质波干涉。
We show that weak measurement leads to unconventional quantum Zeno dynamics with Raman-like transitions via virtual states outside the Zeno subspace. We extend this concept into the realm of non-Hermitian dynamics by showing that the stochastic competition between measurement and a system's own dynamics can be described by a non-Hermitian Hamiltonian. We obtain a solution for ultracold bosons in a lattice and show that a dark state of tunneling is achieved as a steady state in which the observable's fluctuations are zero and tunneling is suppressed by destructive matter-wave interference.