Correlation-Enhanced Algorithmic Cooling

Nayeli A. Rodríguez-Briones, Eduardo Martín-Martínez, Achim Kempf, and Raymond Laflamme

Phys. Rev. Lett. 119, 050502 – Published 2 August 2017

Abstract

We propose a method for increasing the purity of interacting quantum systems that takes advantage of correlations present due to the internal interaction. In particular, when this interaction is sufficiently strong, we show that by using the system’s quantum correlations one can achieve cooling beyond established limits of previous conventional algorithmic cooling proposals which assume no interaction.

Received 13 March 2017

DOI:https://doi.org/10.1103/PhysRevLett.119.050502

Physics Subject Headings (PhySH)

Entanglement manipulation Quantum information processing Thermodynamics

Atomic, Molecular & OpticalQuantum Information, Science & TechnologyParticles & Fields

Authors & Affiliations

Nayeli A. Rodríguez-Briones^1,2,3, Eduardo Martín-Martínez^1,2,3,4, Achim Kempf^1,2,3,4, and Raymond Laflamme^1,2,3,4

¹Institute for Quantum Computing, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
²Department of Physics & Astronomy, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
³Perimeter Institute for Theoretical Physics, 31 Caroline Street North, Waterloo, Ontario N2L 2Y5, Canada
⁴Department of Applied Mathematics, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada