Ground-state cooling of a nanomechanical resonator coupled to two interacting flux qubits

Keyu Xia (夏可宇) and Jörg Evers
Phys. Rev. B 82, 184532 – Published 23 November 2010

Abstract

We discuss cooling of a nanomechanical resonator to its mechanical ground state by coupling it to a collective system of two interacting flux qubits. We find that the collectivity crucially improves cooling by two mechanisms. First, cooling transitions proceed via subradiant Dicke states, and the reduced linewidth of these subradiant states suppresses both the scattering and the environmental contribution to the final phonon number. Second, detrimental carrier excitations without change in the motion of the resonator are suppressed by collective energy shifts.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Received 1 October 2010

DOI:https://doi.org/10.1103/PhysRevB.82.184532

©2010 American Physical Society

Authors & Affiliations

Keyu Xia (夏可宇)* and Jörg Evers

  • Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg, Germany

  • *keyu.xia@mpi-hd.mpg.de
  • joerg.evers@mpi-hd.mpg.de

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 82, Iss. 18 — 1 November 2010

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×