Entropy Suppression through Quantum Interference in Electric Pulses

TL;DR

This paper demonstrates that quantum interference in electric pulse sequences can suppress entanglement entropy in particle-antiparticle creation, with implications for quantum communication and broader two-level quantum systems.

Contribution

It introduces a novel analysis of quantum interference effects on entanglement entropy in the Schwinger process, extending to general two-level quantum systems.

Findings

Quantum interference suppresses entanglement entropy.

Results are relevant for quantum-enhanced classical communications.

Applicable to various two-level quantum systems.

Abstract

The Schwinger process in strong electric fields creates particles and antiparticles that are entangled. The entropy of entanglement between particles and antiparticles has been found to be equal to the statistical Gibbs entropy of the produced system. Here we study the effect of quantum interference in sequences of electric pulses, and show that quantum interference suppresses the entanglement entropy of the created quantum state. This is potentially relevant to quantum-enhanced classical communications. Our results can be extended to a wide variety of two-level quantum systems.