Introduction to Microwave Cavity Optomechanics

Lehnert, K. W.

doi:10.1007/978-3-642-55312-7_11

Cited by 5 publications

(4 citation statements)

References 46 publications

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“…Since microwave components can be readily integrated and require no geometric alignment, microwave approaches offer practical benefits. There are important drawbacks, however: the momentum of a microwave photon is much smaller than a photon at optical frequencies, hence radiation pressure effect (per photon) is much smaller [ 156 ]. Moreover, it is difficult to obtain microwave resonators with high Q factors at room temperature due to resistive and dielectric losses.…”

Section: Detection Of Nanomechanical Motionmentioning

confidence: 99%

“…The resulting sidebands of mechanical origin can then be mixed down with the same signal driving the microwave resonator to obtain the mechanical resonance signals. Detailed information on the use of microwave based optomechanics for observing quantum mechanical effects can be found in [ 156 ]. In addition to sensitive motion detection, microwave-based cavity mechanics coupled with an optomechanical transducer has allowed for bidirectional conversion between optical and microwave photons, with possible applications in quantum computing and information processing [ 163 , 164 , 165 ].…”

Section: Detection Of Nanomechanical Motionmentioning

confidence: 99%

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Nanomechanical Motion Transducers for Miniaturized Mechanical Systems

2017

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Reliable operation of a miniaturized mechanical system requires that nanomechanical motion be transduced into electrical signals (and vice versa) with high fidelity and in a robust manner. Progress in transducer technologies is expected to impact numerous emerging and future applications of micro- and, especially, nanoelectromechanical systems (MEMS and NEMS); furthermore, high-precision measurements of nanomechanical motion are broadly used to study fundamental phenomena in physics and biology. Therefore, development of nanomechanical motion transducers with high sensitivity and bandwidth has been a central research thrust in the fields of MEMS and NEMS. Here, we will review recent progress in this rapidly-advancing area.

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Section: Detection Of Nanomechanical Motionmentioning

confidence: 99%

Section: Detection Of Nanomechanical Motionmentioning

confidence: 99%

Nanomechanical Motion Transducers for Miniaturized Mechanical Systems

2017

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“…By its nature, such nonlinear friction cannot make the overall energy loss negative. However, it plays an important role in providing a means to increase the quality factor of superconducting microwave cavities used in optomechanics [34,35].…”

mentioning

confidence: 99%

Strong negative nonlinear friction from induced two-phonon processes in vibrational systems

Dong¹,

Dykman²,

Chan³

2018

Nat Commun

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Self-sustained vibrations in systems ranging from lasers to clocks to biological systems are often associated with the coefficient of linear friction, which relates the friction force to the velocity, becoming negative. The runaway of the vibration amplitude is prevented by positive nonlinear friction that increases rapidly with the amplitude. Here we use a modulated electromechanical resonator to show that nonlinear friction can be made negative and sufficiently strong to overcome positive linear friction at large vibration amplitudes. The experiment involves applying a drive that simultaneously excites two phonons of the studied mode and a phonon of a faster decaying high-frequency mode. We study generic features of the oscillator dynamics with negative nonlinear friction. Remarkably, self-sustained vibrations of the oscillator require activation in this case. When, in addition, a resonant force is applied, a branch of large-amplitude forced vibrations can emerge, isolated from the branch of the ordinary small-amplitude response.

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“…The field of cavity electromechanics [1,2] investigates mechanical resonators which are parametrically coupled to radio-frequency or microwave circuits. Analogous to cavity optomechanics [3], this coupling is at the heart of a broad set of phenomena and techniques of interest in quantum science and technology.…”

Section: Introductionmentioning

confidence: 99%

Ground State Cooling of an Ultracoherent Electromechanical System

Seis,

Capelle,

Langman

et al. 2021

Preprint

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Cavity electromechanics relies on parametric coupling between microwave and mechanical modes to manipulate the mechanical quantum state, and provide a coherent interface between different parts of hybrid quantum systems. High coherence of the mechanical mode is of key importance in such applications, in order to protect the quantum states it hosts from thermal decoherence. Here, we introduce an electromechanical system based around a soft-clamped mechanical resonator with an extremely high Q-factor (> 10 9 ) held at very low (30 mK) temperatures. This ultracoherent mechanical resonator is capacitively coupled to a microwave mode, strong enough to enable ground-state-cooling of the mechanics (nmin = 0.76 ± 0.16). This paves the way towards exploiting the extremely long coherence times (t coh > 100 ms) offered by such systems for quantum information processing and state conversion.

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Introduction to Microwave Cavity Optomechanics

Cited by 5 publications

References 46 publications

Nanomechanical Motion Transducers for Miniaturized Mechanical Systems

Nanomechanical Motion Transducers for Miniaturized Mechanical Systems

Strong negative nonlinear friction from induced two-phonon processes in vibrational systems

Ground State Cooling of an Ultracoherent Electromechanical System

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