Quantum virtual cooling

• Verfasst von: Cotler, Jordan [VerfasserIn]
• Verfasst von: Preiss, Philipp [VerfasserIn]
• Titel: Quantum virtual cooling
• Verf.angabe: Jordan Cotler, Soonwon Choi, Alexander Lukin, Hrant Gharibyan, Tarun Grover, M. Eric Tai, Matthew Rispoli, Robert Schittko, Philipp M. Preiss, Adam M. Kaufman, Markus Greiner, Hannes Pichler, and Patrick Hayden
• E-Jahr: 2019
• Jahr: 29 July 2019
• Fussnoten: Gesehen am 30.10.2019
• Titel Quelle: Enthalten in: Physical review / X
• Ort Quelle: College Park, Md. : APS, 2011
• Jahr Quelle: 2019
• Band/Heft Quelle: 9(2019,3) Artikel-Nummer 031013, 11 Seiten
• ISSN Quelle: 2160-3308
• DOI: doi:10.1103/PhysRevX.9.031013
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1680695622

Abstract

We propose a quantum-information-based scheme to reduce the temperature of quantum many-body systems and access regimes beyond the current capability of conventional cooling techniques. We show that collective measurements on multiple copies of a system at finite temperature can simulate measurements of the same system at a lower temperature. This idea is illustrated for the example of ultracold atoms in optical lattices, where controlled tunnel coupling and quantum gas microscopy can be naturally combined to realize the required collective measurements to access a lower, virtual temperature. Our protocol is experimentally implemented for a Bose-Hubbard model on up to 12 sites, and we successfully extract expectation values of observables at half the temperature of the physical system. Additionally, we present related techniques that enable the extraction of zero-temperature states directly.