.png){kind=icon}
.png){kind=icon}
Return
Quantum Speed-Up in Collisional Battery Charging
.png){kind=icon}
OA
AI
S
M
G
N
S
DOI：10.1103/PhysRevLett.127.100601.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
We present a collision model for the charging of a quantum battery by identical nonequilibrium qubit units. When the units are prepared in a mixture of energy eigenstates, the energy gain in the battery can be described by a classical random walk, where both average energy and variance grow linearly with time. Conversely, when the qubits contain quantum coherence, interference effects buildup in the battery and lead to a faster spreading of the energy distribution, reminiscent of a quantum random walk. This can be exploited for faster and more efficient charging of a battery initialized in the ground state. Specifically, we show that coherent protocols can yield higher charging power than any possible incoherent strategy, demonstrating a quantum speed-up at the level of a single battery. Finally, we characterize the amount of extractable work from the battery through the notion of ergotropy.
Keywords:
WALKS
Journal
IF:
9
Papers:
91
Citations:
51.9W
Organization
Cited Papers