Entanglement and work statistics in the driven open system

TL;DR

This paper investigates how periodic driving influences entanglement and work statistics in a two-qubit system, revealing enhanced entanglement control and steady work output through external modulation.

Contribution

It demonstrates that external periodic driving can effectively amplify entanglement and modify work modes, offering a versatile approach beyond static reservoir engineering.

Findings

Quasi-steady state entanglement can be amplified by external drive.

Driving extends the temperature range for entanglement emergence.

The system functions as a continuous quantum thermal machine with adjustable modes.

Abstract

We study the entanglement and work statistics in a driven two-qubit system. The regulation of periodic driving has much more versatility and universality in contrast to reservoir engineering in static systems. We found the quasi-steady state entanglement can be amplified effectively by the external drive in certain parameter regimes. The drive extends the range of temperatures or temperature differences at which entanglement can emerge. From the view of the effective Hamiltonian, the addition of the driving alters the inter-qubit coupling and system-bath coupling, which are crucial in determining the quasi-steady state. The work statistics are also investigated. The driven system, as a continuous quantum thermal machine, output work continuously and steadily at the quasi-steady state. There is a distinct operation of modes and corresponding performance by changing driving. It can also be understood that the drive changes the effective Hamiltonian, and further the modes of energy exchanges between the system and the baths as well as the work reservoir.