Cooperative quantum information erasure

TL;DR

This paper introduces a cooperative quantum information erasure protocol that resets multiple qubits simultaneously with high efficiency, low energy cost, and rapid success, leveraging quantum tunnelling and symmetry breaking effects, demonstrated on a quantum annealer.

Contribution

It presents a novel cooperative quantum erasure method that surpasses standard approaches by exploiting symmetry breaking and tunnelling, enabling efficient multi-qubit reset.

Findings

Operates near Landauer energy limit

Achieves ~99.9% success rate

Demonstrated on a commercial quantum annealer

Abstract

We demonstrate an information erasure protocol that resets $N$ qubits at once. The method displays exceptional performances in terms of energy cost (it operates nearly at Landauer energy cost $kT \ln 2$), time duration ($\sim \mu s$) and erasure success rate ($\sim 99,9\%$). The method departs from the standard algorithmic cooling paradigm by exploiting cooperative effects associated to the mechanism of spontaneous symmetry breaking which are amplified by quantum tunnelling phenomena. Such cooperative quantum erasure protocol is experimentally demonstrated on a commercial quantum annealer and could be readily applied in next generation hybrid gate-based/quantum-annealing quantum computers, for fast, effective, and energy efficient initialisation of quantum processing units.