Quantum speed-up in collisional battery charging
- URL: http://arxiv.org/abs/2105.01863v2
- Date: Tue, 24 Aug 2021 05:48:12 GMT
- Title: Quantum speed-up in collisional battery charging
- Authors: Stella Seah, Mart\'i Perarnau-Llobet, G\'eraldine Haack, Nicolas
Brunner, Stefan Nimmrichter
- Abstract summary: We present a collision model for the charging of a quantum battery by identical nonequilibrium qubit units.
We show that coherent protocols can yield higher charging power than any possible incoherent strategy.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: 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.
Related papers
- Scrambling in the Charging of Quantum Batteries [3.5621685463862356]
This Letter investigates the role of quantum scrambling in quantum batteries and its effect on optimal power and charging times.
By analyzing the dynamics of out-of-time-order correlators, our findings indicate that quantum scrambling does not necessarily lead to faster charging, despite its potential for accelerating the process.
arXiv Detail & Related papers (2024-09-16T16:11:55Z) - Harnessing Nth Root Gates for Energy Storage [30.733286944793527]
We explore the use of fractional control-not gates in quantum thermodynamics.
Nth-root gate allows for a paced application of two-qubit operations.
We apply it in quantum thermodynamic protocols for charging a quantum battery.
arXiv Detail & Related papers (2024-09-16T14:57:55Z) - Hyperbolic enhancement of a quantum battery [0.0]
We show how one can circumvent the problem of energy loss by proposing a quantum battery model.
Namely, charging the battery quadratically with a short temporal pulse induces a hyperbolic enhancement in the stored energy.
We show that when the driving is strong enough the useful work which can be extracted from the quantum battery, that is the ergotropy, is exactly equal to the stored energy.
arXiv Detail & Related papers (2024-05-19T20:13:04Z) - Local-projective-measurement-enhanced quantum battery capacity [13.61700291107261]
capacity is an important indicator for a battery.
We study the enhancement of the battery capacity under local projective measurements on a subsystem of the quantum state.
arXiv Detail & Related papers (2024-05-06T01:11:25Z) - An energy efficient quantum-enhanced machine [13.368172641201571]
We apply shortcut-to-adiabaticity techniques to suppress quantum friction and improve work production.
While the average energy cost of the shortcut protocol is only about $3%$, the work output is enhanced by up to approximately 33%$.
Our results pave the way for energy efficient machines with quantum-enhanced performance.
arXiv Detail & Related papers (2024-04-23T14:24:33Z) - Thermodynamics of adiabatic quantum pumping in quantum dots [50.24983453990065]
We consider adiabatic quantum pumping through a resonant level model, a single-level quantum dot connected to two fermionic leads.
We develop a self-contained thermodynamic description of this model accounting for the variation of the energy level of the dot and the tunnelling rates with the thermal baths.
arXiv Detail & Related papers (2023-06-14T16:29:18Z) - Vacuum enhanced charging of a quantum battery [0.0]
We show how a purely quantum effect related to the vacuum of the electromagnetic field can enhance the charging of a quantum battery.
In particular, we demonstrate how an anti-Jaynes Cummings interaction can be used to increase the stored energy of an effective two-level atom.
arXiv Detail & Related papers (2023-01-31T13:54:14Z) - Quantum interaction of sub-relativistic aloof electrons with mesoscopic
samples [91.3755431537592]
Relativistic electrons experience very slight wave packet distortion and negligible momentum recoil when interacting with nanometer-sized samples.
Modelling fast electrons as classical point-charges provides extremely accurate theoretical predictions of energy-loss spectra.
arXiv Detail & Related papers (2022-11-14T15:22:37Z) - Quantum enhancement of a single quantum battery by repeated interactions
with large spins [0.0]
We investigate coherent charging of a single quantum battery by repeated interactions with many-atom large spins.
For an initially empty battery, we derive analytical results of the average number of excitations and hence the charging power in the short-time limit.
arXiv Detail & Related papers (2022-09-26T08:12:17Z) - Collective effects and quantum coherence in dissipative charging of
quantum batteries [0.0]
We show that for low temperatures the collective process can attain a charging power that increases polynomically with the number of batteries.
We also study the dissipative charging process of single battery using a time dependent Hamiltonian that generates coherences in the energy basis.
arXiv Detail & Related papers (2022-05-13T21:17:32Z) - Optimal charging of a superconducting quantum battery [13.084212951440033]
We report the experimental realization of a quantum battery based on superconducting qubits.
Our model explores dark and bright states to achieve stable and powerful charging processes, respectively.
Our results pave the way for proposals of new superconducting circuits able to store extractable work for further usage.
arXiv Detail & Related papers (2021-08-09T18:53:07Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.