2 papers
quant-ph2026
Collective advantage from a minimal record in a quantum information engine
Kangqiao Liu, Jie Gu, Deyou Chen
For a single particle, a quantum information engine can turn measurement fluctuations into transport by raising a barrier behind the particle each time its position is measured. Wh…
quant-ph2026
Maximal-velocity deficit under a finite-support constraint in a hard-wall half-line continuous-time quantum walk
Kangqiao Liu, Deyou Chen
Continuous-time quantum walks on a lattice spread ballistically and converge to a limiting distribution for the rescaled position. On the hard-wall half line the boundary reflects…