• Corpus ID: 252568085

Charging by quantum measurement

  title={Charging by quantum measurement},
  author={Jiazhen Yan and Jun Jing},
We propose a quantum charging scheme fueled by measurements on ancillary qubits serving as disposable chargers. A stream of identical qubits are sequentially coupled to a quantum battery of N + 1 levels and measured by projective operations after joint unitary evolutions of optimized intervals. If qubit-chargers are prepared in excited state and measured on ground state, their excitations (energy) can be near-completely transferred to battery by iteratively updating the optimized measurement… 

Figures from this paper



Quantum Speed-Up in Collisional Battery Charging.

It is shown 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.

Quantum Measurement Cooling.

It is found that the probability that QMC occurs when the measurement basis is chosen randomly can be very large as compared to the probability of extracting energy (heat engine operation), while remaining always smaller than the most useless operation, namely, dumping heat in both baths.

Enhancing the Charging Power of Quantum Batteries.

This work provides an upper bound to the achievable quantum advantage when the interaction order is restricted; i.e., at most k batteries are interacting, which constitutes a fundamental limit on the advantage offered by quantum technologies over their classical counterparts.

Quantacell: powerful charging of quantum batteries

It is demonstrated that the quantum advantage for power holds when, with cyclic operation in mind, initial and final states are required to be separable.

Quantum Charging Advantage Cannot Be Extensive without Global Operations.

Quantum batteries are devices made from quantum states, which store and release energy in a fast and efficient manner, thus offering numerous possibilities in future technological applications. They

Random quantum batteries

Quantum nano-devices are fundamental systems in quantum thermodynamics that have been the subject of profound interest in recent years. Among these, quantum batteries play a very important role. In

Bounds on the capacity and power of quantum batteries

Quantum batteries, composed of quantum cells, are expected to outperform their classical analogs. The origin of such advantages lies in the role of quantum correlations, which may arise during the

High-Power Collective Charging of a Solid-State Quantum Battery.

This work presents and solves a model of a QB that can be engineered in solid-state architectures and demonstrates the emergence of a quantum advantage in the charging power of Dicke QBs, which scales like sqrt[N] for N≫1.

Many-body localized quantum batteries

The collective and quantum behavior of many-body systems may be harnessed to achieve fast charging of energy storage devices, which have been recently dubbed quantum batteries. In this paper, we

Quantum Advantage in the Charging Process of Sachdev-Ye-Kitaev Batteries.

This Letter offers the first strong numerical evidence of a quantum advantage occurring due to the maximally entangling underlying quantum dynamics of the exactly solvable Sachdev-Ye-Kitaev model.