5 papers
Quantum-Geometric Fingerprints of Altermagnetic Order in Planar Magnetotransport
Zhichun Ouyang, Wei-Jing Dai, Zi-Ting Sun +2
Identifying altermagnetic order through transport requires signatures that are sensitive to magnetic symmetry but do not rely on a net magnetization. Here we show that planar magne…
Distributed estimation of many-body Hamiltonians via punctured surface code
Linmu Qiao, Zhichun Ouyang, Sisi Zhou
We study how a punctured surface code can turn many local -type couplings into one protected logical signal for distributed quantum metrology, where the goal is to estimate a we…
Quantum Mpemba-like effect in Unruh thermalization
Zihao Wang, Wenjing Chen, Si-Wei Han +4
We revisit the thermal nature of the Unruh effect within a quantum thermodynamic framework. For a Unruh-deWitt (UDW) detector in -dimensional Minkowski spacetime, we demonstrate…
Reliable quantum master equation of the Unruh-DeWitt detector
Si-Wei Han, Wenjing Chen, Langxuan Chen +2
In this paper, we present a method for estimating the validity range of the quantum Markovian master equation as applied to the Unruh-DeWitt (UDW) detector within a broader context…
Relative entropy formulation of thermalization process in a Schwarzschild spacetime
Si-Wei Han, Zhichun Ouyang, Zhiyao Hu +1
We revisit the problem of the thermalization process in an entropic formulation for the Unruh-DeWitt (UDW) detector outside a Schwarzschild black hole. We derive the late-time dyna…