Charging a quantum battery with linear feedback control

@article{Mitchison2021ChargingAQ,
  title={Charging a quantum battery with linear feedback control},
  author={Mark T. Mitchison and John Goold and Javier Prior},
  journal={Quantum},
  year={2021},
  volume={5},
  pages={500}
}
Energy storage is a basic physical process with many applications. When considering this task at the quantum scale, it becomes important to optimise the non-equilibrium dynamics of energy transfer to the storage device or battery. Here, we tackle this problem using the methods of quantum feedback control. Specifically, we study the deposition of energy into a quantum battery via an auxiliary charger. The latter is a driven-dissipative two-level system subjected to a homodyne measurement whose… 

The Bethe ansatz for a new integrable open quantum system

In this paper we apply the nested algebraic Bethe ansatz to compute the eigenvalues and the Bethe equations of the transfer matrix of the new integrable Lindbladian found in [1]. We show that it can

Optimal charging of open spin-chain quantum batteries via homodyne-based feedback control.

We study the problem of charging a dissipative one-dimensional XXX spin-chain quantum battery using local magnetic fields in the presence of spin decay. The introduction of quantum feedback control

Optimal Quantum Control of Charging Quantum Batteries

Quantum control allows to address the problem of engineering quantum dynamics for special purposes. While recently the field of quantum batteries has attracted much attention, optimization of their

Cavity Heisenberg-spin-chain quantum battery

We propose a cavity-Heisenberg spin chain (CHS) quantum battery (QB) with the long-range interactions and investigate its charging process. The performance of the CHS QB is substantially improved

Entanglement, Coherence, and Extractable Work in Quantum Batteries

We investigate the connection between quantum resources and extractable work in quantum batteries. We demonstrate that quantum coherence in the battery or the battery-charger entanglement is a

Charging quantum batteries via Otto machines: The influence of monitoring

The charging of a quantum battery by a four-stroke quantum machine that works either as an engine or a refrigerator is investigated. The presented analysis provides the energetic behavior of the

Diverging current fluctuations in critical Kerr resonators

The parametrically pumped Kerr model describes a driven-dissipative nonlinear cavity, whose nonequilibrium phase diagram features both continuous and discontinuous quantum phase transitions. We

Quantum advantage in charging cavity and spin batteries by repeated interactions

Recently, an unconditional advantage has been demonstrated for the process of charging of a quantum battery in a collisional model. Motivated by the question of whether such an advantage could be

Periodically refreshed quantum thermal machines

We introduce unique class of cyclic quantum thermal machines (QTMs) which can maximize their performance at the finite value of cycle duration τ where they are most irreversible. These QTMs are based

References

SHOWING 1-10 OF 45 REFERENCES

Quantum Measurement and Control: Frontmatter

and a at

The xishacorene natural products are structurally unique apolar diterpenoids that feature a bicyclo[3.3.1] framework. These secondary metabolites likely arise from the well-studied, structurally

Entropy production in continuously measured Gaussian quantum systems

The entropy production rate is a key quantity in nonequilibrium thermodynamics of both classical and quantum processes. No universal theory of entropy production is available to date, which hinders

Ultra-stable charging of fast-scrambling SYK quantum batteries

Abstract Collective behavior strongly influences the charging dynamics of quantum batteries (QBs). Here, we study the impact of nonlocal correlations on the energy stored in a system of N QBs. A

Dissipative dynamics of an open quantum battery

Coupling with an external environment inevitably affects the dynamics of a quantum system. Here, we consider how charging performances of a quantum battery, modelled as a two level system, are

Charging and energy fluctuations of a driven quantum battery

We consider a quantum battery modelled as a set of N independent two-level quantum systems driven by a time dependent classical source. Different figures of merit, such as stored energy, time of

Non-Markovian effects on charging and self-discharging process of quantum batteries

TLDR
This investigation shows that the battery can be fully charged and its energy can be preserved for long times in non-Markovian dynamics compared with Markovians, indicating that memory effects can play a significant role in improving the performance of quantum batteries.

Passive states and KMS states for general quantum systems

We characterize equilibrium states of quantum systems by a condition of passivity suggested by the second principle of thermodynamics. Ground states and β-KMS states for all inverse temperatures β≧0

Non-Demolition Measurement and Control in Quantum Dynamical Systems

A multi-stage version of the theory of quantum-mechanical measurements and quantum-statistical decisions applied to the non-demolition control problem for quantum objects is developed. It is shown

An open systems approach to quantum optics