Subtleties in Quantum Mechanical Metastability

带非完整约束的力学系统的林德布拉德量子化

Lindbladian quantization of mechanical systems with nonholonomic constraints

本文针对缺乏正则哈密顿形式的非完整力学系统，将其量子化为马尔可夫开放量子系统，找到对应Chaplygin雪橇和Suslov问题经典动力学的林德布拉德超算符，数值验证协方差符合亚稳态理论预测。

Quantum-mechanical motion and the stillness of experimental records

Experimenting with metastability in recording devices leads us to wonder about an interface between equations of motion and the stillness of experimental records. Here we delineate an interface between wave functions as language to describe motion and Turing tapes as language to describe experimental records. After extending quantum formalism to make this interface explicit, we report on constraints and freedoms in choosing quantum-mechanical equations to model experiments with devices. We prove that choosing equations of wave functions and operators to achieve a fit between calculated probabi…

亚光速和超光速的自由空间光子速度

Subluminal and superluminal velocities of free-space photons

研究自由空间电磁波包的直线传播，发现局域化波包具有亚光速群速和超光速相速，其乘积等于光速平方，揭示了光子波函数的量子描述细节。

Constraints on probing quantum coherence to infer gravitational entanglement

Finding a feasible scheme for testing the quantum mechanical nature of the gravitational interaction has been attracting an increasing level of attention. Gravity mediated entanglement generation so far appears to be the key ingredient for a potential experiment. In a recent proposal [D. Carney et al., Phys. Rev. X Quantum 2, 030330 (2021)] combining an atom interferometer with a low-frequency mechanical oscillator, a coherence revival test is proposed for verifying this entanglement generation. With measurements performed only on the atoms, this protocol bypasses the need for correlation meas…