108 citations · 130 across the 10 of their papers we have counts for
5 papers · 1 filter
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…
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…
Classical codes violate the conjectured square-root bound for quantum random access codes
Kangqiao Liu
We consider whether every quantum random access code (QRAC) with density-operator encodings and arbitrary decoding measurements obeys the conjectured bound ,…
Finite-frequency fluctuation-response bounds for open quantum systems
Jie Gu, Kangqiao Liu
We derive a finite-frequency fluctuation-response inequality for Markovian open quantum systems in an input-output setting. For any downstream measurement of the emitted field, the…
Response kinetic uncertainty relation for Markovian open quantum systems
Kangqiao Liu, Jie Gu
Response uncertainty relations in stochastic thermodynamics extend precision bounds to the sensitivity of observables under external perturbations. Here we derive a quantum respons…