Analysing a complementarity experiment on the quantum-classical boundary

State-Dependent Bulk-Boundary Maps and Black Hole Complementarity

We provide a simple and explicit construction of local bulk operators that describe the interior of a black hole in the AdS/CFT correspondence. The existence of these operators is predicated on the assumption that the mapping of CFT operators to local bulk operators depends on the state of the CFT. We show that our construction leads to an exactly local effective field theory in the bulk. Barring the fact that their charge and energy can be measured at infinity, we show that the commutator of local operators inside and outside the black hole vanishes exactly, when evaluated within correlation …

基于吸收的量子行走中位移量子比特估计

Absorption-Based Qubit Estimation in Discrete-Time Quantum Walks

该研究通过单个吸收边界实现量子行走中位移量子比特的高效估计，利用谱方法获得逃逸概率和Fisher信息，提出了一种集成光子学实现方案，展示了吸收在量子行走中作为硬币状态计量的简单和可扩展方法。

Quantum quenches, linear response and superfluidity out of equilibrium

By analysing the sensitivity to a twist in the boundary conditions of the stationary state attained by a many-body system long after a quantum quench, we extend the concepts of the helicity modulus and the stiffness to non-equilibrium situations. Using these generalised quantities, we characterise the out-of-equilibrium dynamics of hard-core bosons quenched to/from superfluid/insulating phases and show that qualitative new features emerge as compared to the equilibrium case. Our predictions can be tested in experiments with cold bosonic atoms confined in toroidal traps and subject to artificia…

量子力学在引力全息中的失效

Breakdown of quantum mechanics in gravitational holography

本文结合黑洞互补性与AdS/CFT提出，黑洞近视界量子信息源于视界隐变量，暗示需超越标准量子概率描述。