Observation of quantum-measurement backaction with an ultracold atomic gas
TL;DR: In this paper, the collective motion of an ultracold atomic gas confined tightly within a Fabry-Perot optical cavity was established as a system for investigating the quantum mechanics of macroscopic bodies.
read more
Abstract: Current research on micromechanical resonators strives for quantum-limited detection of the motion of macroscopic objects. Prerequisite to this goal is the observation of measurement backaction consistent with quantum metrology limits. However, thermal noise currently dominates measurements and precludes ground-state preparation of the resonator. Here, we establish the collective motion of an ultracold atomic gas confined tightly within a Fabry–Perot optical cavity as a system for investigating the quantum mechanics of macroscopic bodies. The cavity-mode structure selects a particular collective vibrational motion that is measured by the cavity’s optical properties, actuated by the cavity optical field and subject to backaction by the quantum force fluctuations of this field. Experimentally, we quantify such fluctuations by measuring the cavity-light-induced heating of the intracavity atomic ensemble. These measurements represent the first observation of backaction on a macroscopic mechanical resonator at the standard quantum limit. Nanoscale beams are one platform for exploring quantum-mechanical phenomena in ever-larger systems. The collective motion of a macroscopic ensemble of ultracold atoms confined in an optical cavity is established as an alternative approach.
read more
Chat with Paper
AI Agents for this Paper
Find similar papers on Google Scholar, PubMed and Arxiv
Write a critical review of this paper
Analyze citations of this paper to find unaddressed research gaps
Citations
A perspective on hybrid quantum opto- and electromechanical systems
Yiwen Chu,Simon Gröblacher +1 more
TL;DR: In this paper, an overview of the current state, as well as an outlook of the future directions, challenges, and opportunities for this growing field of research is presented. And the authors focus in particular on the prospects for ground state cooling of mechanical modes and their use in quantum circuits, transducers and networks.
21
Real-time emission spectrum of a hybrid atom-optomechanical cavity
TL;DR: In this article, the authors theoretically investigate the real-time emission spectrum of a two-level atom coupled to an optomechanical cavity (OMC) using the quantum trajectory approach, and obtain the single-photon time-dependent spectrum in this hybrid system where the influences of a strong atom-cavity coupling and a strong optOMEchanical interaction are studied.
21
An all-optical feedback assisted steady state of an optomechanical array
TL;DR: In this article, the authors explore the effect of all-optical feedback on the steady state dynamics of optomechanical arrays arising from various topologies and show that implementing an-all optical feedback loop in each arrangement can enhance the degree of entanglement between inter cavity optical and mechanical modes.
Patent
Systems and methods for tuning a cavity
Oskar Painter,Martin Winger,Qiang Lin,Amir H. Safavi-Naeini,Thiago P. Mayer Alegre,T. D. Blasius,Alexander G. Krause +6 more
- 09 Nov 2012
TL;DR: In this article, the authors describe an integrated opto-mechanical and electromechanical system made of photonic crystals configured to move based on electrical voltages and/or back action effects from electromagnetic waves.
20
On-Chip Silicon Optomechanical Cavities at Low Temperatures
Bradley Hauer
- 01 Jan 2020
TL;DR: In this paper, an optomechanically mediated thermal ringdown technique was used to measure the dissipation in a half-ring resonator between 10 mK to 10 K, and attribute it to two-level system defects embedded within the one-dimensional geometry of the device.
References
Quantum Mechanical Noise in an Interferometer
TL;DR: In this article, the authors proposed a new technique, the squeezed-state technique, that allows one to decrease the photon-counting error while increasing the radiation pressure error, or vice versa.
3.4K
Strong dispersive coupling of a high-finesse cavity to a micromechanical membrane.
Jeff D. Thompson,Benjamin M. Zwickl,Andrew Jayich,Florian Marquardt,Steven Girvin,Jack Harris +5 more
TL;DR: A cavity which is detuned by the motion of a 50-nm-thick dielectric membrane placed between two macroscopic, rigid, high-finesse mirrors is demonstrated, which segregates optical and mechanical functionality to physically distinct structures and avoids compromising either.
Quantum Theory of Cavity-Assisted Sideband Cooling of Mechanical Motion
TL;DR: It is found that reaching the quantum limit of arbitrarily small phonon numbers requires going into the good-cavity (resolved phonon sideband) regime where the cavity linewidth is much smaller than the mechanical frequency and the corresponding cavity detuning.
Precision Measurement of the Casimir Force from 0.1 to 0.9 μ m
Umar Mohideen,Anushree Roy +1 more
TL;DR: In this article, an atomic force microscope was used to make precision measurements of the Casimir force between a metallized sphere of diameter 196 \ensuremath{mu}m and flat plate, and the experimental results were consistent with present theoretical calculations including the finite conductivity, roughness, and temperature corrections.
1.2K