Quantum enhancement of a single quantum battery by repeated interactions with large spins

• URL: http://arxiv.org/abs/2209.12498v1
• Date: Mon, 26 Sep 2022 08:12:17 GMT
• Title: Quantum enhancement of a single quantum battery by repeated interactions with large spins
• Authors: P. Chen, T. S. Yin, Z. Q. Jiang, and G. R. Jin
• Abstract summary: 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.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: A generalized collision model is developed to investigate coherent charging a single quantum battery by repeated interactions with many-atom large spins, where collective atom operators are adopted and the battery is modeled by a uniform energy ladder. 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. Our analytical results show that a faster charging and an increased amount of the power in the coherent protocol uniquely arise from the phase coherence of the atoms. Finally, we show that the charging power defined by the so-called ergotropy almost follows our analytical result, due to a nearly pure state of the battery in the short-time limit.

Related papers

• Sunburst quantum Ising battery [0.0]
  We study the energy transfer process in the recently proposed sunburst quantum Ising model. We show that in this model of the quantum battery, coupling between the battery and charger can be used to optimize the ergotropy.
  arXiv  Detail & Related papers  (2024-06-26T11:10:09Z)
• Energetics of a pulsed quantum battery [0.0]
  We present a transparent analytic model of a two-component quantum battery composed of a charger and an energy holder. We discuss explicitly the optimal design of the battery in terms of the driving strength of the pulse, the coupling between the charger and the holder, and the inevitable energy loss into the environment. We anticipate that our theory can act as a helpful guide for the nascent experimental work building and characterizing the first generation of truly quantum batteries.
  arXiv  Detail & Related papers  (2024-03-29T12:54:53Z)
• Amplification of quantum transfer and quantum ratchet [56.47577824219207]
  We study a model of amplification of quantum transfer and making it directed which we call the quantum ratchet model. The ratchet effect is achieved in the quantum control model with dissipation and sink, where the Hamiltonian depends on vibrations in the energy difference synchronized with transitions between energy levels. Amplitude and frequency of the oscillating vibron together with the dephasing rate are the parameters of the quantum ratchet which determine its efficiency.
  arXiv  Detail & Related papers  (2023-12-31T14:04:43Z)
• Pulse-controlled qubit in semiconductor double quantum dots [57.916342809977785]
  We present a numerically-optimized multipulse framework for the quantum control of a single-electron charge qubit. A novel control scheme manipulates the qubit adiabatically, while also retaining high speed and ability to perform a general single-qubit rotation.
  arXiv  Detail & Related papers  (2023-03-08T19:00:02Z)
• Universality of critical dynamics with finite entanglement [68.8204255655161]
  We study how low-energy dynamics of quantum systems near criticality are modified by finite entanglement. Our result establishes the precise role played by entanglement in time-dependent critical phenomena.
  arXiv  Detail & Related papers  (2023-01-23T19:23:54Z)
• 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 advantage in charging cavity and spin batteries by repeated interactions [0.0]
  Recently, an unconditional advantage has been demonstrated for the process of charging of a quantum battery in a collisional model. We consider a model where the battery is modeled by a quantum harmonic oscillator or a large spin, charged via repeated interactions with a stream of non-equilibrium qubit units. For both setups, we show that a quantum protocol can significantly outperform the most general adaptive classical schemes.
  arXiv  Detail & Related papers  (2022-04-29T18:04:27Z)
• NMR investigations of quantum battery using star-topology spin systems [0.0]
  We experimentally investigate various aspects of quantum battery with the help of nuclear spin systems in star-topology configuration. We first carry out numerical analysis to study how charging a quantum battery depends on the relative purity factors of charger and battery spins. By experimentally measuring the polarization of the battery spin undergoing charging, we estimate the battery energy and establish the theoretically predicted quantum advantage.
  arXiv  Detail & Related papers  (2021-12-31T13:17:37Z)
• 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)
• Quantum speed-up in collisional battery charging [0.0]
  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.
  arXiv  Detail & Related papers  (2021-05-05T04:28:43Z)
• Bridging the Gap Between the Transient and the Steady State of a Nonequilibrium Quantum System [58.720142291102135]
  Many-body quantum systems in nonequilibrium remain one of the frontiers of many-body physics. Recent work on strongly correlated electrons in DC electric fields illustrated that the system may evolve through successive quasi-thermal states. We demonstrate an extrapolation scheme that uses the short-time transient calculation to obtain the retarded quantities.
  arXiv  Detail & Related papers  (2021-01-04T06:23:01Z)

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.