The evolution of quantum battery capacity of GHZ-like states under Markovian channels

TL;DR

This paper investigates how the capacity of quantum batteries based on GHZ and GHZ-like states evolves under various Markovian channels, revealing phenomena like sudden death and frozen capacity.

Contribution

It provides a detailed analysis of quantum battery capacity dynamics under different Markovian noise channels for GHZ and GHZ-like states, highlighting new phenomena such as capacity freezing.

Findings

Capacity shows sudden death under depolarizing and bit-phase flip channels.

Capacity gradually decreases and becomes frozen under dephasing channels.

Larger number of channel applications accelerates capacity freezing.

Abstract

Quantum battery has enormous potential for development, and quantum battery capacity is an important indicator of quantum battery. In this work, we mainly study the evolution of quantum battery capacity of GHZ state and GHZ-like states under Markovian channels in the tripartite system. We find that under the depolarizing channel and bit-phase flip channel, the battery capacity shows a brief sudden death of the capacity. And we also find that under the dephasing channel, the battery capacity gradually decreases and tends to a constant, that is, the frozen capacity. We show that the battery capacity monotonically decreases for GHZ state under the amplitude damping channel on the first subsystem. And we study the variation of capacity under the Markovian channels n times on the first subsystem using the GHZ state. We can observe that under the amplitude damping and dephasing channels, the battery capacity decreases and tends to a constant, i.e. frozen capacity, and the larger n, the earlier this phenomenon occurs. We also investigate the evolution of capacity under three independent same type Markovian channels. We have also conducted corresponding research on GHZ-like states.