Quantum optomechanical transducer with ultrashort pulses

Vostrosablin, Nikita; Rakhubovsky, Andrey A.; Hoff, Ulrich Busk; Andersen, Ulrik L.; Filip, Radim

doi:10.1088/1367-2630/aadbb7

Cited by 13 publications

(11 citation statements)

References 64 publications

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“…Over this time (i) the mechanical mode picks up a phase, which determines which quadrature is measured at the next interaction, and (ii) the mechanics exchanges phonons with the thermal environment. In particular, the presence of the latter contribution-neglected in previous studies [15][16][17][18][19]-competes with the measurement, eventually leading to a nonequilibrium steady state.…”

Section: A Simple Model Of Stroboscopic Conditional Dynamicsmentioning

confidence: 92%

“…Pulsed protocols can also lift the stringent requirement of sideband resolution. By employing pulses much shorter than the mechanical period, quantum state preparation and readout, e.g., of low-entropy and squeezed mechanical states [14][15][16][17][18][19][20], as well as optomechanical and all-mechanical entanglement [21] can in principle be achieved. However, in order to neglect nonunitary processes, coherent operations are restricted to very short times (also less than a single mechanical cycle).…”

Section: Introductionmentioning

confidence: 99%

“…This however requires including mechanical dissipation in the description of the dynamics, as opposed to Refs. [15][16][17][18][19]. Due to the competition between radiationpressure interaction and mechanical dissipation, the mechanical system eventually settles into a steady state, albeit a periodic one.…”

Section: Introductionmentioning

confidence: 99%

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Stroboscopic quantum optomechanics

Brunelli

Malz

Schließer

et al. 2020

Phys. Rev. Research

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We consider an optomechanical cavity that is driven stroboscopically by a train of short pulses. By suitably choosing the interpulse spacing we show that ground-state cooling and mechanical squeezing can be achieved, even in the presence of mechanical dissipation and for moderate radiation-pressure interaction. We provide a full quantum-mechanical treatment of stroboscopic backaction-evading measurements, for which we give a simple analytic insight, and discuss preparation and verification of squeezed mechanical states. We further consider stroboscopic driving of a pair of noninteracting mechanical resonators coupled to a common cavity field, and show that they can be simultaneously cooled and entangled. Stroboscopic quantum optomechanics extends measurement-based quantum control of mechanical systems beyond the good-cavity limit.

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Section: A Simple Model Of Stroboscopic Conditional Dynamicsmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Stroboscopic quantum optomechanics

Brunelli

Malz

Schließer

et al. 2020

Phys. Rev. Research

View full text Add to dashboard Cite

show abstract

“…By employing pulses much shorter than the mechanical period, quantum state preparation and readout, e.g. of low-entropy and squeezed mechanical states [14][15][16][17][18][19], as well as opto-mechanical and all-mechanical entanglement [20] can in principle be achieved. However, in order to neglect non-unitary processes, coherent operations are restricted to very short times (also less than a single mechanical cycle).…”

Section: Introductionmentioning

confidence: 99%

“…This however requires including mechanical dissipation in the description of the dynamics, as opposed to Refs. [15][16][17][18][19]. Due to the competition between radiation-pressure interaction and mechanical dissipation, the mechanical system eventually settles into a steady state, albeit a periodic one.…”

Section: Introductionmentioning

confidence: 99%

Stroboscopic quantum optomechanics

Brunelli,

Malz,

Schliesser

et al. 2020

Preprint

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We consider an optomechanical cavity that is driven stroboscopically by a train of short pulses. By suitably choosing the inter-pulse spacing we show that ground-state cooling and mechanical squeezing can be achieved, even in the presence of mechanical dissipation and for moderate radiation-pressure interaction. We provide a full quantum-mechanical treatment of stroboscopic backaction-evading measurements, for which we give a simple analytic insight, and discuss preparation and verification of squeezed mechanical states. We further consider stroboscopic driving of a pair of non-interacting mechanical resonators coupled to a common cavity field, and show that they can be simultaneously cooled and entangled. Stroboscopic quantum optomechanics extends measurement-based quantum control of mechanical systems beyond the good-cavity limit.

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High-precision multiparameter estimation of mechanical force by quantum optomechanics

Ruppert

Rakhubovsky

Filip

2022

Sci Rep

Self Cite

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A nanomechanical oscillator can be used as a sensitive probe of a small linearized mechanical force. We propose a simple quantum optomechanical scheme using a coherent light mode in the cavity and weak short-pulsed light-matter interactions. Our main result is that if we transfer some displacement to the mechanical mode in an initialization phase, then a much weaker optomechanical interaction is enough to obtain a high-precision multiparameter estimation of the unknown force. This approach includes not only estimating the displacement caused by the force but also simultaneously observing the phase shift and squeezing of the mechanical mode. We show that the proposed scheme is robust against typical experimental imperfections and demonstrate the feasibility of our scheme using orders of magnitude weaker optomechanical interactions than in previous related works. Thus, we present a simple, robust estimation scheme requiring only very weak light-matter interactions, which could open the way to new nanomechanical sensors.

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Quantum optomechanical transducer with ultrashort pulses

Cited by 13 publications

References 64 publications

Stroboscopic quantum optomechanics

Stroboscopic quantum optomechanics

Stroboscopic quantum optomechanics

High-precision multiparameter estimation of mechanical force by quantum optomechanics

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