Imaging Correlations in Heterodyne Spectra for Quantum Displacement Sensing.

  title={Imaging Correlations in Heterodyne Spectra for Quantum Displacement Sensing.},
  author={Antonio Pontin and J. E. Lang and Avishek Chowdhury and Paolo Vezio and Francesco Marino and B. Morana and Enrico Serra and Francesco Marin and Tania S. Monteiro},
  journal={Physical review letters},
  volume={120 2},
The extraordinary sensitivity of the output field of an optical cavity to small quantum-scale displacements has led to breakthroughs such as the first detection of gravitational waves and of the motions of quantum ground-state cooled mechanical oscillators. While heterodyne detection of the output optical field of an optomechanical system exhibits asymmetries which provide a key signature that the mechanical oscillator has attained the quantum regime, important quantum correlations are lost. In… Expand
Revealing Hidden Quantum Correlations in an Electromechanical Measurement.
This work recovers complex-valued quantum correlations in the microwave domain using an electromechanical device made out of a superconducting resonator and a drumhead mechanical oscillator using a phase-sensitive measurement scheme employing two local oscillators. Expand
Coherent noise cancellation in optomechanical system with double optical modes
A quantum metrology protocol for continuous force sensing is developed beyond the quantum standard limit on performing a coherent quantum noise cancellation (CQNC) strategy in an optomechanicalExpand
Two-timescale stochastic Langevin propagation for classical and quantum optomechanics
Interesting experimental signatures of quantum cavity optomechanics arise because the quantum back-action induces correlations between incident quantum shot noise and the cavity field. While theExpand
Quantum motion of a squeezed mechanical oscillator attained via an optomechanical experiment
We experimentally investigate a mechanical squeezed state realized in a parametrically-modulated membrane resonator embedded in an optical cavity. We demonstrate that a quantum characteristic of theExpand
Quantum force sensing using backaction noise suppression in optomechanical system
In this paper, we investigate the quantum force sensing in a single optomechanical system by the use of a coherent quantum noise cancellation scheme. The system consists of a Fabry–Perot cavityExpand
Dynamical decoupling based quantum sensing : Floquet analysis and finite-duration-pulse effects
A spin qubit can be protected from a dephasing spin bath using dynamical decoupling (DD). Microwave π-pulses are repeatedly applied to the spin qubit to invert its state and average out anyExpand
Calibrated quantum thermometry in cavity optomechanics
Cavity optomechanics has achieved the major breakthrough of the preparation and observation of macroscopic mechanical oscillators in peculiarly quantum states. The development of reliable indicatorsExpand
Quantum Signature of a Squeezed Mechanical Oscillator.
This work extends the analysis to a squeezed state of an oscillator embedded in an optical cavity, produced by the parametric effect originated by a suitable combination of optical fields. Expand
Levitated optomechanics with periodically driven fields
Levitated optomechanics offers a route to high-Q, low frequency oscillators by all-optical trapping in high vacuum, although progress has been hampered by particle loss at ∼ 1 mbar. Combining anExpand
Probing quantum gravity effects with quantum mechanical oscillators
Phenomenological models aiming to join gravity and quantum mechanics often predict effects that are potentially measurable in refined low-energy experiments. For instance, modified commutationExpand


Improving Broadband Displacement Detection with Quantum Correlations
Interferometers enable ultrasensitive measurement in a wide array of applications from gravitational wave searches to force microscopes. The role of quantum mechanics in the metrological limits ofExpand
Appearance and Disappearance of Quantum Correlations in Measurement-Based Feedback Control of a Mechanical Oscillator
Quantum correlations between imprecision and backaction are a hallmark of continuous linear measurements. Here, we study how measurement-based feedback can be used to improve the visibility ofExpand
Quantum-coherent coupling of a mechanical oscillator to an optical cavity mode
This optomechanical system establishes an efficient quantum interface between mechanical oscillators and optical photons, which can provide decoherence-free transport of quantum states through optical fibres and offers a route towards the use of mechanical oscillator states as quantum transducers or in microwave-to-optical quantum links. Expand
Squeezed light from a silicon micromechanical resonator
The continuous position measurement of a solid-state, optomechanical system fabricated from a silicon microchip and comprising a micromechanical resonator coupled to a nanophotonic cavity is described, observing squeezing of the reflected light’s fluctuation spectrum at a level 4.5 ± 0.2 per cent below that of vacuum noise. Expand
Split-sideband spectroscopy in slowly modulated optomechanics
Optomechanical coupling between the motion of a mechanical oscillator and a cavity represents a new arena for experimental investigation of quantum effects on the mesoscopic and macroscopic scale.Expand
Complex Squeezing and Force Measurement Beyond the Standard Quantum Limit.
It is found theoretically that complex squeezing is a component of ponderomotive squeezing of light through cavity optomechanics and proposed a detection scheme called synodyne detection, which reveals complex squeezing and allows the accounting of measurement backaction. Expand
Sideband cooling of micromechanical motion to the quantum ground state
Sideband cooling of an approximately 10-MHz micromechanical oscillator to the quantum ground state is demonstrated and the device exhibits strong coupling, allowing coherent exchange of microwave photons and mechanical phonons. Expand
Quantum correlations from a room-temperature optomechanical cavity
A cross-correlation technique is demonstrated to distinguish optically driven motion from thermally driven motion, observing this quantum backaction signature up to room temperature and demonstrating a path toward absolute thermometry with quantum mechanically calibrated ticks. Expand
Optimal signal recovery for pulsed balanced detection
To measure quantum features in a classical world constrains us to extend the classical technology to the limit, inventing and discovering new schemes to use the classical devices, while reducing andExpand
Strong Optomechanical Squeezing of Light
We create squeezed light by exploiting the quantum nature of the mechanical interaction between laser light and a membrane mechanical resonator embedded in an optical cavity. The radiation pressureExpand