Quantum information/entanglement transfer rates between subsystems

TL;DR

This paper investigates the rates of quantum information and entanglement transfer between subsystems, revealing a relation to the coupling strength that links microscopic interactions to entanglement dynamics.

Contribution

It provides evidence for a conjectured relation between entanglement transfer rates and coupling sizes in random subsystem evolutions, connecting microphysical couplings to entanglement dynamics.

Findings

Entanglement transfer rates relate to coupling strength.

Evidence supports a conjectured relation between rates and couplings.

Findings applicable to quantum computation, thermodynamics, and black hole physics.

Abstract

The size of quantum information -- or entanglement -- transfer rates between subsystems is a generic question in problems ranging from decoherence in quantum computation and sensing, to quantum underpinnings of thermodynamics, to the behavior of quantum black holes. We investigate such rates for given couplings between subsystems, for sufficiently random subsystem evolution, and find evidence for a conjectured relation of these rates to the size of the couplings. This provides a direct connection between entanglement transfer and the microphysical couplings responsible for it.