Ground-state cooling of a suspended nanowire through inelastic macroscopic quantum tunneling in a current-biased Josephson junction

Abstract

We demonstrate that a suspended nanowire forming a weak link between two superconductors can be cooled to its motional ground state by a supercurrent flow. The predicted cooling mechanism has its origins in magnetic field induced inelastic tunneling of the macroscopic superconducting phase associated with the junction. Furthermore, we show the voltage-drop over the junction is proportional to the average population of the vibrational modes in the stationary regime, a phenomena which can be used to probe the level of cooling.

arXiv comment5 pages, 3 figures

References in corpus (11)

• Resolved Sideband Cooling of a Micromechanical Oscillator
• Laser cooling of a nanomechanical resonator mode to its quantum ground state
• Ground state cooling of mechanical resonators
• Cooling carbon nanotubes to the phononic ground state with constant electron current
• Nanoelectromechanical Systems
• Cooling a mechanical resonator via coupling to a tunable double quantum dot
• Electronic Aharonov-Bohm Effect Induced by Quantum Vibrations
• Manipulation with Andreev states in spin active mesoscopic Josephson junctions
• Cooling of a suspended nanowire by an AC Josephson current flow
• Electromechanical instability in suspended carbon nanotubes
• Superconductive pumping of nanomechanical vibrations

Cited by in corpus (5)

• Micrometre-scale refrigerators
• Ground-State Cooling of a Mechanical Oscillator by Interference in Andreev Reflection
• Cooling by heating in nonequilibrium nanosystems
• Strong mechanically-induced effects in DC current-biased suspended Josephson junctions
• Ground state cooling of nanomechanical resonators by electron transport