Calibrated quantum thermometry in cavity optomechanics

Chowdhury, Avishek; Vezio, P.; Bonaldi, M.; Borrielli, A.; Marino, Francesco; Morana, B.; Pandraud, G.; Pontin, A.; Prodi, G. A.; Sarro, P.M.; Serra, Enrico; Marín, F.

doi:10.1088/2058-9565/ab05f1

Cited by 18 publications

(19 citation statements)

References 30 publications

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“…The agreement of this curve with the experimental data is good, and an extensive characterization of our system (reported in Ref. [31]) further confirms the reliability of the measurement ofn.…”

supporting

confidence: 84%

Quantum Signature of a Squeezed Mechanical Oscillator

Chowdhury¹,

Vezio²,

Bonaldi

et al. 2020

Phys. Rev. Lett.

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Some predictions of quantum mechanics are in contrast with the macroscopic realm of everyday experience, in particular those originated by the Heisenberg uncertainty principle, encoded in the non-commutativity of some measurable operators. Nonetheless, in the last decade opto-mechanical experiments have actualized macroscopic mechanical oscillators exhibiting such non-classical properties. A key indicator is the asymmetry in the strength of the motional sidebands generated in

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supporting

confidence: 84%

Quantum Signature of a Squeezed Mechanical Oscillator

Chowdhury¹,

Vezio²,

Bonaldi

et al. 2020

Phys. Rev. Lett.

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“…The optomechanical effect of the probe field in the present experiment is not negligible. The accuracy in zeroing its detuning is here around ∼0.1κ, and its stability over few minutes is of the same order [56]. For such a small detuning, the optomechanical frequency shift δΩ m and damping Γ opt = Γ eff − Γ m Γ eff are roughly proportional, according to [32]…”

Section: Status Of the Experimentsmentioning

confidence: 93%

“…The optomechanical cavity is cooled in a helium flux cryostat, operating at 9 K during the measurements presented in this article. More details on the optomechanical system and its characterization are reported and discussed in reference [56]. In this work we exploit the (0, 2) drum mode of the membrane at ∼530 kHz, having a quality factor of 6.4 × 10 6 at cryogenic temperature (mechanical linewidth 0.08 Hz).…”

Section: Status Of the Experimentsmentioning

confidence: 99%

“…An example of such sidebands, superimposed for a clearer visual comparison, is shown in Figure 3. The direct measurement of the sidebands ratio must be corrected for the residual probe detuning, as described in reference [56]. The analysis of the spectrum shown in the figure gives a phonon occupation number ofn = 5, and an effective width of Γ eff = 2π × 6 kHz.…”

Section: Status Of the Experimentsmentioning

confidence: 99%

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Probing quantum gravity effects with quantum mechanical oscillators

et al. 2020

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Phenomenological models aiming to join gravity and quantum mechanics often predict effects that are potentially measurable in refined low-energy experiments. For instance, modified commutation relations between position and momentum, that account for a minimal scale length, yield a dynamics that can be codified in additional Hamiltonian terms. When applied to the paradigmatic case of a mechanical oscillator, such terms, at the lowest order in the deformation parameter, introduce a weak intrinsic nonlinearity and, consequently, deviations from the classical trajectory. This point of view has stimulated several experimental proposals and realizations, leading to meaningful upper limits to the deformation parameter. All such experiments are based on classical mechanical oscillators, i.e., excited from a thermal state. We remark indeed that decoherence, that plays a major role in distinguishing the classical from the quantum behavior of (macroscopic) systems, is not usually included in phenomenological quantum gravity models. However, it would not be surprising if peculiar features that are predicted by considering the joined roles of gravity and quantum physics should manifest themselves just on purely quantum objects. On the basis of this consideration, we propose experiments aiming to observe possible quantum gravity effects on macroscopic mechanical oscillators that are preliminary prepared in a high purity state, and we report on the status of their realization.

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“…Green dashed line shows recent data of a nanoparticle feedback cooled in an optical tweezer using no cavity for cooling or readout purposes. EPFL '20: [7]; Vienna 2020: [1]; ETH 2020: [8]; ETH 2019: [9]; Delft 2019: [10]; Florence 2019: [11]; Copenhagen 2018: [12]; Boulder 2017: [13]; JILA 2016: [14]; Boulder '11: [15]; Caltech '11: [16]; EPFL '11: [17]; MIT '11: [18]; Cornell '10: [5]; MPQ '09: [19]; Vienna 2009: [20]; JILA 2008: [21].…”

Section: Typical Features Of Cavity Optomechanicsmentioning

confidence: 99%

Quantum sensing with nanoparticles for gravimetry: when bigger is better

Rademacher

Millen

2019

Advanced Optical Technologies

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Following the first demonstration of a levitated nanosphere cooled to the quantum ground state in 2020 (U. Delić, et al. Science, vol. 367, p. 892, 2020), macroscopic quantum sensors are seemingly on the horizon. The nanosphere’s large mass as compared to other quantum systems enhances the susceptibility of the nanoparticle to gravitational and inertial forces. In this viewpoint, we describe the features of experiments with optically levitated nanoparticles (J. Millen, T. S. Monteiro, R. Pettit, and A. N. Vamivakas, “Optomechanics with levitated particles,” Rep. Prog. Phys., vol. 83, 2020, Art no. 026401) and their proposed utility for acceleration sensing. Unique to the levitated nanoparticle platform is the ability to implement not only quantum noise limited transduction, predicted by quantum metrology to reach sensitivities on the order of 10−15 ms−2 (S. Qvarfort, A. Serafini, P. F. Barker, and S. Bose, “Gravimetry through non-linear optomechanics,” Nat. Commun., vol. 9, 2018, Art no. 3690) but also long-lived quantum spatial superpositions for enhanced gravimetry. This follows a global trend in developing sensors, such as cold-atom interferometers, that exploit superposition or entanglement. Thanks to significant commercial development of these existing quantum technologies, we discuss the feasibility of translating levitated nanoparticle research into applications.

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Calibrated quantum thermometry in cavity optomechanics

Cited by 18 publications

References 30 publications

Quantum Signature of a Squeezed Mechanical Oscillator

Quantum Signature of a Squeezed Mechanical Oscillator

Probing quantum gravity effects with quantum mechanical oscillators

Quantum sensing with nanoparticles for gravimetry: when bigger is better

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