Dissipation-accelerated entanglement generation

TL;DR

This paper introduces a novel method where strong dissipation is used to accelerate entanglement generation between qubits, challenging the traditional view of dissipation as purely detrimental in quantum systems.

Contribution

The study demonstrates that dissipation can be harnessed to speed up entanglement creation and extends this approach to multi-qubit W state generation.

Findings

Maximal entanglement time decreases with higher dissipation rates.

Dissipation accelerates excitation redistribution without quantum jumps.

Scheme generalizes to produce W states in three-qubit systems.

Abstract

Dissipation is usually considered a negative factor for observing quantum effects and for harnessing them for quantum technologies. Here we propose a scheme for speeding up the generation of quantum entanglement between two coupled qubits by introducing a strong dissipation channel to one of these qubits. The maximal entanglement is conditionally established by evenly distributing a single excitation between these two qubits. When the excitation is initially held by the dissipative qubit, the dissipation accelerates the excitation re-distribution process for the quantum state trajectory without quantum jumps. Our results show that the time needed to conditionally attain the maximal entanglement is monotonously decreased as the dissipative rate is increased. We further show that this scheme can be generalized to accelerate the production of the W state for the three-qubit system, where one NH qubit is symmetrically coupled to two Hermitian qubits.