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Sideband cooling micromechanical motion to the quantum ground state
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In this article, a microwave cavity optomechanical system was realized by coupling the motion of an aluminum membrane to the resonance frequency of a superconducting circuit, and damping and cooling the membrane motion with radiation pressure forces.Abstract:
Accessing the full quantum nature of a macroscopic mechanical oscillator first requires elimination of its classical, thermal motion. The flourishing field of cavity optomechanics provides a nearly ideal architecture for both preparation and detection of mechanical motion at the quantum level. We realize a microwave cavity optomechanical system by coupling the motion of an aluminum membrane to the resonance frequency of a superconducting circuit [1]. By exciting the microwave circuit below its resonance frequency, we damp and cool the membrane motion with radiation pressure forces, analogous to laser cooling of the motion of trapped ions. The microwave excitation serves not only to cool, but also to monitor the displacement of the membrane. A nearly shot-noise limited, Josephson parametric amplifier is used to detect the mechanical sidebands of this microwave excitation and quantify the thermal motion as it is cooled with radiation pressure forces to its quantum ground state [2].read more
Citations
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Nonclassical states of levitated macroscopic objects beyond the ground state
TL;DR: In this article, the possibility of conditional squeezing of a levitated particle induced by the homodyne detection of light in a pulsed optomechanical setup within the resolved sideband regime was analyzed.
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Dynamics of an optomechanical system with quadratic coupling: Effect of first order correction to adiabatic elimination.
TL;DR: The dynamics of an optomechanical system in which a resonantly driven cavity mode is quadratically coupled to the displacement of a mechanical resonator is explored, which shows that the effect of first order correction cannot be neglected when the ratio of the cavity decay rate to the mechanical resonance frequency becomes smaller than a critical value.
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Electrical tuning of mechanical characteristics in qPlus sensor: Active Q and resonance frequency control
TL;DR: In this paper, an electrical feedback method for independent and simultaneous tuning of both the resonance frequency and the quality factor of a harmonic oscillator, the so called qPlus configuration of quartz tuning forks, is presented.
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Macroscopic Entanglement of Remote Optomechanical Systems Assisted by Parametric Interactions
Yong-Hong Ma,E. Wu +1 more
TL;DR: In this paper, a scheme to generate stationary entanglement between two distant Fabry-Perot cavities with parametric interactions was proposed, and the bipartite Entanglement was quantified.
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Optimal estimation of time-dependent gravitational fields with quantum optomechanical systems
Sofia Qvarfort,Sofia Qvarfort,A. Douglas K. Plato,A. Douglas K. Plato,David Edward Bruschi,Fabienne Schneiter,Daniel Braun,Alessio Serafini,Dennis Rätzel +8 more
TL;DR: In this article, the quantum Fisher information for linear displacements of the mechanical element due to gravity is computed using a nonlinear optomechanical system with a time-dependent Hamiltonian.
References
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Observation of Bose-Einstein Condensation in a Dilute Atomic Vapor
TL;DR: A Bose-Einstein condensate was produced in a vapor of rubidium-87 atoms that was confined by magnetic fields and evaporatively cooled and exhibited a nonthermal, anisotropic velocity distribution expected of the minimum-energy quantum state of the magnetic trap in contrast to the isotropic, thermal velocity distribution observed in the broad uncondensed fraction.
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Quantum ground state and single-phonon control of a mechanical resonator
A. D. O’Connell,Max Hofheinz,Markus Ansmann,Radoslaw C. Bialczak,M. Lenander,Erik Lucero,Matthew Neeley,Daniel Sank,Haohua Wang,Martin Weides,James Wenner,John M. Martinis,Andrew Cleland +12 more
TL;DR: This work shows that conventional cryogenic refrigeration can be used to cool a mechanical mode to its quantum ground state by using a microwave-frequency mechanical oscillator—a ‘quantum drum’—coupled to a quantum bit, which is used to measure the quantum state of the resonator.
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Cavity Optomechanics: Back-Action at the Mesoscale
TL;DR: Recent experiments have reached a regime where the back-action of photons caused by radiation pressure can influence the optomechanical dynamics, giving rise to a host of long-anticipated phenomena.
Journal ArticleDOI
Introduction to quantum noise, measurement, and amplification
TL;DR: In this paper, a pedagogical introduction to the physics of quantum noise and its connections to quantum measurement and quantum amplification is given, and the basics of weak continuous measurements are described.
Journal ArticleDOI
Optomechanically Induced Transparency
Stefan Weis,R. Riviere,Samuel Deléglise,E. Gavartin,Olivier Arcizet,Albert Schliesser,Tobias J. Kippenberg +6 more
TL;DR: Electromagnetically induced transparency in an optomechanical system whereby the coupling of a cavity to a light pulse is used to control the transmission of light through the cavity may help to allow the engineering of light storage and routing on an optical chip.