Stroboscopic quantum optomechanics

Brunelli, Matteo; Malz, Daniel; Schließer, Albert; Nunnenkamp, Andreas

doi:10.1103/physrevresearch.2.023241

Cited by 23 publications

(21 citation statements)

References 51 publications

(103 reference statements)

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“…For the prospective membrane described above, one reaches a backaction-dominated regime with S qba ≥ S th for S det ≈ 10 −30 m 2 /Hz. Eventually, one could use advanced quantum measurement protocols to evade quantum backaction [4,60].…”

Section: L021001-4mentioning

confidence: 99%

Membrane-Based Scanning Force Microscopy

et al. 2021

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We report the development of a scanning force microscope based on an ultrasensitive silicon nitride membrane optomechanical transducer. Our development is made possible by inverting the standard microscope geometry-in our instrument, the substrate is vibrating and the scanning tip is at rest. We present topography images of samples placed on the membrane surface. Our measurements demonstrate that the membrane retains an excellent force sensitivity when loaded with samples and in the presence of a scanning tip. We discuss the prospects and limitations of our instrument as a quantum-limited force sensor and imaging tool.

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Section: L021001-4mentioning

confidence: 99%

Membrane-Based Scanning Force Microscopy

et al. 2021

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“…The condition for hitting the quantum regime then reads, according to Ref. [101], χ 2π n T m /Q, which with our parameters becomes χ 0.4. Based on this analysis, strong enough stroboscopic measurements seem in reach.…”

Section: Pulsed Techniquesmentioning

confidence: 77%

“…The scheme was discussed in detail recently in Ref. [101]. The authors found that the requirement for the measurement strength can be relaxed in this case.…”

Section: Pulsed Techniquesmentioning

confidence: 99%

Gravitational Forces Between Nonclassical Mechanical Oscillators

et al. 2021

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Interfacing quantum mechanics and gravity is one of the great open questions in natural science. Micromechanical oscillators have been suggested as a plausible platform to carry out these experiments. We present an experimental design aiming at these goals, inspired by Schmöle et al. [Class. Quantum Grav. 33, 125031 (2016)]. Gold spheres weighing of the order of a milligram will be positioned on large silicon nitride membranes, which are spaced at submillimeter distances from each other. These massloaded membranes are mechanical oscillators that vibrate at about 2 kHz frequencies in a drum mode. They are operated and measured by coupling to microwave cavities. First, we show that it is possible to measure the gravitational force between the oscillators at deep cryogenic temperatures, where thermal mechanical noise is strongly suppressed. We investigate the measurement of gravity when the positions of the gravitating masses exhibit significant quantum fluctuations, including preparation of the massive oscillators in the ground state, or in a squeezed state. We also present a plausible scheme to realize an experiment where the two oscillators are prepared in a two-mode squeezed motional quantum state that exhibits nonlocal quantum correlations and gravity at the same time. Although the gravity is classical, the experiment will pave the way for testing true quantum gravity in related experimental arrangements. In a proof-of-principle experiment, we operate a 1.7 mm diameter Si 3 N 4 membrane loaded by a 1.3 mg gold sphere. At a temperature of 10 mK, we observe the drum mode with a quality factor above half a million at 1.7 kHz, showing strong promise for the experiments. Following implementation of vibration isolation, cryogenic positioning, and phase noise filtering, we foresee that realizing the experiments is in reach by combining known pieces of current technology.

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Section: Discussion and Outlookmentioning

confidence: 99%

Membrane-based scanning force microscopy

Hälg,

Gisler,

Tsaturyan

et al. 2020

Preprint

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We report the development of a scanning force microscope based on an ultra-sensitive silicon nitride membrane transducer. Our development is made possible by inverting the standard microscope geometry -in our instrument, the substrate is vibrating and the scanning tip is at rest. We present first topography images of samples placed on the membrane surface. Our measurements demonstrate that the membrane retains an excellent force sensitivity when loaded with samples and in the presence of a scanning tip. We discuss the prospects and limitations of our instrument as a quantum-limited force sensor and imaging tool.

show abstract

Stroboscopic quantum optomechanics

Cited by 23 publications

References 51 publications

Membrane-Based Scanning Force Microscopy

Membrane-Based Scanning Force Microscopy

Gravitational Forces Between Nonclassical Mechanical Oscillators

Membrane-based scanning force microscopy

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