3 papers
quant-ph2026
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…
hep-th2026
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…
quant-ph2024
Control incompatibility in multiparameter quantum metrology
Zhiyao Hu, Shilin Wang, Linmu Qiao +6
In practical applications like quantum sensing and quantum imaging, there is often a necessity to estimate multiple parameters simultaneously. Although the ultimate precision limit…