Journal ArticleDOI
Realization of a nonlinear interferometer with parametric amplifiers
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TLDR
In this article, the authors constructed an interferometer with parametric amplifiers as beam splitters, and they found that the fringe intensity depends quadratically on the intensity of the phase sensing field at high gain.Abstract:
We construct an interferometer with parametric amplifiers as beam splitters. Because of the gain in the parametric amplifiers, the maximum output intensity of the interferometer can be much bigger than the input intensity as well as the intensity inside the interferometer (the phase sensing intensity). We find that the fringe intensity depends quadratically on the intensity of the phase sensing field at high gain. This type of nonlinear interferometer has better sensitivity than the traditional linear interferometer made of beam splitters with the same phase sensing intensity.read more
Citations
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Journal ArticleDOI
Quantum metrology with parametric amplifier-based photon correlation interferometers
TL;DR: This work studies a new type of interferometer in which the beam splitting and recombination elements are parametric amplifiers, and observes an improvement of 4.1±0.3 dB in signal-to-noise ratio.
Journal ArticleDOI
Nonlinear interferometers in quantum optics
Maria V. Chekhova,Z. Y. Ou +1 more
TL;DR: In this paper, the main works in the field of nonlinear interferometers, which has been developing ever since the start of non linear optics and has seen growing interest in recent years due to the applications in quantum information and quantum metrology, are reviewed.
Journal ArticleDOI
Quantum-Enhanced Sensing Based on Time Reversal of Nonlinear Dynamics.
Daniel Linnemann,Helmut Strobel,W. Muessel,J. Schulz,Robert J. Lewis-Swan,Karen Kheruntsyan,Markus K. Oberthaler +6 more
TL;DR: A nonlinear detection scheme exploiting time-reversal dynamics that disentangles continuous variable entangled states for feasible readout and is capable of exhausting the quantum resource by detecting solely mean atom numbers.
Journal ArticleDOI
Imaging with quantum states of light
TL;DR: Using quantum states of light for imaging both reveals quantum phenomena and enables new protocols that result in images that surpass classical limitations as discussed by the authors, such as image contrast, resolution enhancement that exceeds the classical limit and acquisition of sub-shot-noise phase or amplitude images.
Journal ArticleDOI
Ultrasensitive measurement of MEMS cantilever displacement sensitivity below the shot noise limit
R.C. Pooser,B.J. Lawrie +1 more
TL;DR: In this paper, the authors demonstrate the first direct measurement of a microelectro-mechanical system (MEMS) cantilever displacement with a noise floor at 40% of the shot noise limit (SNL).
References
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Journal ArticleDOI
On the Relative Motion of the Earth and the Luminiferous Ether
TL;DR: In this paper, it was shown that the aberration was unchanged when observations were made with a telescope filled with water, and that the effect was attributed to a simple composition of the velocity of light with the velocities of the earth in its orbit.
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SU(2) and SU(1,1) interferometers.
TL;DR: In this paper, a Lie-group-theoretical approach to the analysis of interferometers is presented, which can achieve phase sensitivity Δo approaching 1/N, where N is the total number of quanta entering the interferometer, provided that the light entering the input ports is prepared in a suitable quantum state.
Journal ArticleDOI
Strong relative intensity squeezing by four-wave mixing in rubidium vapor.
TL;DR: It is measured that 6.3 dB of relative intensity squeezing is generated by stimulated, nondegenerate four-wave mixing in a hot rubidium vapor, which is of interest for experiments involving cold atoms or atomic ensembles.