Non-Gaussian Mechanical Motion via Single and Multiphonon Subtraction from a Thermal State

Enzian, Georg; Freisem, Lars; Price, John J.; Svela, Andreas; Clarke, Jack; Shajilal, Biveen; Janoušek, Jiří; Buchler, Ben C.; Lam, Ping Koy; Vanner, Michael R.

doi:10.1103/physrevlett.127.243601

Cited by 18 publications

(7 citation statements)

References 51 publications

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“…Building on the previous two experiments, in this subsequent work we greatly improved the overall readout efficiency of the acoustic mode and utilized the heterodyne measurement to perform state tomography of the acoustic mode for an initial thermal state as well as a single-phonon and two-phonon subtracted state. 3 The experimentally observed phase-space distributions for the acoustic mode are shown in Fig. 3.…”

Section: Tomography Of Non-gaussian Mechanical Motion Generated Via S...mentioning

confidence: 99%

“…2 Thirdly, using a heterodyne measurement of the anti-Stokes signal, we perform state tomography of the states generated single and two-phonon subtraction and reveal the non-Gaussian states of the acoustic field generated. 3 Fourthly, we explore the second-order coherence of Stokes scattered light across the Brillouin lasing threshold and identify super-thermal statistics below the threshold. 4 Lastly, in this talk experimental results that perform a counterintuitive enhancement to sideband cooling via zero-photon detection will be presented.…”

Section: Introductionmentioning

confidence: 99%

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Brillouin optomechanics: strong coupling, the lasing transition, and single-phonon-level operations

Vanner

2024

Quantum Sensing, Imaging, and Precision Metrology II

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Backward Brillouin scattering in whispering-gallery-mode micro-resonators offers an exciting avenue to pursue both classical and quantum optomechanics applications. Our team-the Quantum Measurement Lab-together with our collaborators, are currently exploring and utilizing the favourable properties this platform affords for non-Gaussian motional state preparation of acoustic fields. In particular, the high acoustic frequencies, acoustic mode selectivity, and low optical absorption provide a promising route to overcome current hindrances within optomechanics. Some of our key recent results in this direction include: the observation of Brillouin optomechanical strong coupling, single-phonon addition and subtraction to a thermal state of the acoustic field, advancing the state-of-the-art of mechanical state tomography to observe the non-Gaussian states generated by single-and multi-phonon subtraction, studying the second-order coherence across the Brillouin lasing threshold, and enhancing sideband cooling via zero-photon detection. This talk will cover these results, what they enable, and the broader direction of our lab.

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Section: Tomography Of Non-gaussian Mechanical Motion Generated Via S...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Brillouin optomechanics: strong coupling, the lasing transition, and single-phonon-level operations

Vanner

2024

Quantum Sensing, Imaging, and Precision Metrology II

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“…Thus, seminal progress has been made both in theoretics and experiment research with the progress of technology. [23][24][25][26][27][28][29][30][31][32][33][34][35][36][37] Recently, strong lightmatter coupling becomes a main ingredient based on cavity optomechanical systems. Within the strong-coupling regime, especially in single-photon strong-coupling regime, a strong photon nonlinearity such as photon blockade effect occur, which leads to the high level state of the cavity filed is suppressed.…”

Section: Doi: 101002/andp202200608mentioning

confidence: 99%

Multiphonon Bundle Emission in a Strong‐Coupling Cavity Optomechanical System

Deng

Lan

et al. 2023

Annalen der Physik

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Nonclassical effects in mesoscopic systems have attracted much attention recently. In this paper, it is shown that multiphonon bundle emission can be observed in a strong-coupling cavity optomechanical system. Theoretical analysis shows that when the driving field is adjusted to nth-order sideband excitation, the coupling between the cavity mode and the vibrational mode leads to super-Rabi oscillations, and finally results in an n-phonon bundles emission. Based on the current technology, this process can work in a wide range of parameters. Numerical simulation confirms the validity of the derivation. It is thought that this physical mechanism broadens the applications of cavity optomechanical system in realm of quantum phononics, such as in quantum metrology and phonon laser.

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“…In addition to such Gaussian states, the linearized regime combined with photon-counting enables the preparation of single-and two-mode non-Gaussian mechanical states [26][27][28][29]. Recent experimental progress using this combination has enabled single-phonon addition and subtraction to single-mode mechanical systems [30][31][32][33][34][35][36], and, similarly, to generate entangled mechanical states that share a single quanta [37,38]. Furthermore, photon-counting protocols have been proposed to create macroscopic superposition states which can help to overcome the challenge of single-photon weak coupling [39,40].…”

Section: Introductionmentioning

confidence: 99%

Two-mode Schrödinger-cat states with nonlinear optomechanics: generation and verification of non-Gaussian mechanical entanglement

Kanari-Naish

Clarke

Qvarfort

et al. 2022

Quantum Sci. Technol.

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Cavity quantum optomechanics has emerged as a new platform for quantum science and technology with applications ranging from quantum-information processing to tests of the foundations of physics. Of crucial importance for optomechanics is the generation and verification of non-Gaussian states of motion and a key outstanding challenge is the observation of a canonical two-mode Schrödinger-cat state in the displacement of two mechanical oscillators. In this work, we introduce a pulsed approach that utilizes the nonlinearity of the radiation-pressure interaction combined with photon-counting measurements to generate this entangled non-Gaussian mechanical state, and, importantly, describe a protocol using subsequent pulsed interactions to verify the non-Gaussian entanglement generated. Our pulsed verification protocol allows quadrature moments of the two mechanical oscillators to be measured up to any finite order providing a toolset for experimental characterisation of bipartite mechanical quantum states and allowing a broad range of inseparability criteria to be evaluated. Key experimental factors, such as optical loss and mechanical decoherence, are carefully analyzed and we show that the scheme is feasible with only minor improvements to current experiments that operate outside the resolved-sideband regime. Our scheme provides a new avenue for quantum experiments with entangled mechanical oscillators and offers significant potential for further research and development that utilizes such non-Gaussian states for quantum-information and sensing applications, and for studying the quantum-to-classical transition.

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Non-Gaussian Mechanical Motion via Single and Multiphonon Subtraction from a Thermal State

Cited by 18 publications

References 51 publications

Brillouin optomechanics: strong coupling, the lasing transition, and single-phonon-level operations

Brillouin optomechanics: strong coupling, the lasing transition, and single-phonon-level operations

Multiphonon Bundle Emission in a Strong‐Coupling Cavity Optomechanical System

Two-mode Schrödinger-cat states with nonlinear optomechanics: generation and verification of non-Gaussian mechanical entanglement

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