Cooperative quantum information erasure

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.

8 pages, 5 figures

References in corpus (2)

• Finite-time Landauer principle
• Erasure without work in an asymmetric, double-well potential

Cited by in corpus (11)

• Collective advantages in finite-time thermodynamics
• Energy-Consumption Advantage of Quantum Computation
• Key Issues Review: Useful autonomous quantum machines
• Geometrical optimization of spin clusters for the preservation of quantum coherence
• Quantum Coding with Finite Thermodynamic Resources
• Charging a quantum spin network towards Heisenberg-limited precision
• Generalized Landauer bound from absolute irreversibility
• Topological Defects from Quantum Reset Dynamics
• Minimizing Dissipation via Interacting Environments: Quadratic Convergence to Landauer Bound
• Optimally Fast Qubit Reset
• Nonequilibrium thermometry via an ensemble of initially correlated qubits