Coherent feedback cooling of a nanomechanical membrane with atomic spins

Abstract

Coherent feedback stabilises a system towards a target state without the need of a measurement, thus avoiding the quantum backaction inherent to measurements. Here, we employ optical coherent feedback to remotely cool a nanomechanical membrane using atomic spins as a controller. Direct manipulation of the atoms allows us to tune from strong-coupling to an overdamped regime. Making use of the full coherent control offered by our system, we perform spin-membrane state swaps combined with stroboscopic spin pumping to cool the membrane in a room-temperature environment to $T=216\mathrm{mK}$ (${\bar{n}}_m=2.3\times 10^3$ phonons) in $200\mu \mathrm{s}$. We furthermore observe and study the effects of delayed feedback on the cooling performance. Starting from a cryogenically pre-cooled membrane, this method would enable cooling of the mechanical oscillator close to its quantum mechanical ground state and the preparation of nonclassical states.

arXiv comment13 pages, 8 figures

References in corpus (37)

• Cavity Optomechanics
• Quantum metrology with nonclassical states of atomic ensembles
• Strong dispersive coupling of a high finesse cavity to a micromechanical membrane
• Quantum interface between light and atomic ensembles
• Quantum technologies with hybrid systems
• Time Delay Induced Death in Coupled Limit Cycle Oscillators
• Ultra-coherent nanomechanical resonators via soft clamping and dissipation dilution
• A single NV defect coupled to a nanomechanical oscillator
• Experimental Evidence of Time Delay Induced Death in Coupled Limit Cycle Oscillators
• Strain-mediated coupling in a quantum dot-mechanical oscillator hybrid system
• Quantum feedback: theory, experiments, and applications
• Quantum back action evading measurement of motion in a negative mass reference frame
• Two-mode squeezed states in cavity optomechanics via engineering of a single reservoir
• Strong mechanical driving of a single electron spin
• Resolving the energy levels of a nanomechanical oscillator
• Realization of an optomechanical interface between ultracold atoms and a membrane
• Topical Review: Spins and mechanics in diamond
• Advantages of Coherent Feedback for Cooling Quantum Oscillators
• Enhanced entanglement of two different mechanical resonators via coherent feedback
• Sympathetic cooling of a membrane oscillator in a hybrid mechanical-atomic system
• Entanglement between Distant Macroscopic Mechanical and Spin Systems
• Quantum dot opto-mechanics in a fully self-assembled nanowire
• Single-Atom Cavity QED and Opto-Micromechanics
• Tensor polarizability and dispersive quantum measurement of multilevel atoms
• A perspective on hybrid quantum opto- and electromechanical systems
• Light-mediated strong coupling between a mechanical oscillator and atomic spins one meter apart
• Hybrid Mechanical Systems
• Quantum Coherent Nonlinear Feedbacks with Applications to Quantum Optics on Chip
• Harmonic Oscillator in Heat Bath: Exact simulation of time-lapse-recorded data, exact analytical benchmark statistics
• Analysis of membrane phononic crystals with wide bandgaps and low-mass defects
• Coherent control and feedback cooling in a remotely-coupled hybrid atom-optomechanical system
• Remote Hamiltonian Interactions Mediated by Light
• Light-Mediated Collective Atomic Motion in an Optical Lattice Coupled to a Membrane
• Cavity optomechanics assisted by optical coherent feedback
• Long Distance Coupling of a Quantum Mechanical Oscillator to the Internal States of an Atomic Ensemble
• Enhancing a slow and weak optomechanical nonlinearity with delayed quantum feedback
• Combined feedback and sympathetic cooling of a mechanical oscillator coupled to ultracold atoms

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