Angular displacements estimation enhanced by squeezing and parametric amplification

• URL: http://arxiv.org/abs/2008.12495v1
• Date: Fri, 28 Aug 2020 06:29:12 GMT
• Title: Angular displacements estimation enhanced by squeezing and parametric amplification
• Authors: Gao-Feng Jiao, Qiang Wang, L. Q. Chen, Weiping Zhang and Chun-Hua Yuan
• Abstract summary: We study the angular displacements estimation based on a modified Mach-Zehnder interferometer (MZI) Two optical parametric amplifiers (PAs) are introduced into two arms of the standard MZI, respectively. The employment of PAs can both squeeze the shot noise and amplify the photon number inside the interferometer.
• Score: 5.694133490171689
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We theoretically study the angular displacements estimation based on a modified Mach-Zehnder interferometer (MZI), in which two optical parametric amplifiers (PAs) are introduced into two arms of the standard MZI, respectively. The employment of PAs can both squeeze the shot noise and amplify the photon number inside the interferometer. When the unknown angular displacements are introduced to both arms, we derive the multiparameter quantum Cram\'er-Rao bound (QCRB) using the quantum Fisher information matrix approach, and the bound of angular displacements difference between the two arms is compared with the sensitivity of angular displacement using the intensity detection. On the other hand, in the case where the unknown angular displacement is in only one arm, we give the sensitivity of angular displacement using the method of homodyne detection. It can surpass the standard quantum limit (SQL) and approach the single parameter QCRB. Finally, the effect of photon losses on sensitivity is discussed.

Related papers

• Pushing the Boundaries: Interferometric Mass Photometry at the Quantum Limit of Sensitivity [0.7864304771129751]
  In comparison to the conventional confocal interferometric scattering (iSCAT) approach, our setup adds a second arm to form a Michelson interferometer. We evaluate the quantum Cram'er-Rao bound (QCRB) for different quantum states, including single-mode coherent states, multi-frequency coherent states, and phase-averaged coherent states.
  arXiv  Detail & Related papers  (2024-10-25T09:21:01Z)
• Geometric Antibunching and Directional Shaping of Photon Anticorrelations [44.99833362998488]
  We find a new mechanism for photon anticorrelation, termed as geometric antibunching. This phenomenon is completely agnostic to the quantum state of the emitters.
  arXiv  Detail & Related papers  (2024-10-23T14:29:15Z)
• Momentum-entangled two-photon interference for quantum-limited transverse-displacement estimation [0.0]
  We show that it is possible to perform transverse-displacement estimation with a precision that increases with the difference of the transverse momenta of the photons. For the estimation of small displacements, it is possible to simplify the measurement scheme replacing the transverse-momentum resolving detectors with bucket detectors.
  arXiv  Detail & Related papers  (2024-08-22T14:52:12Z)
• Enhancing phase sensitivity in Mach-Zehnder interferometer with various detection schemes using SU(1,1) coherent states [0.0]
  The Mach-Zehnder interferometer (MZI) is a versatile tool for analyzing this phenomenon. This paper analyzes the phase sensitivity of a MZI in various scenarios using different detection schemes and input states.
  arXiv  Detail & Related papers  (2024-06-12T08:54:17Z)
• Estimation with ultimate quantum precision of the transverse displacement between two photons via two-photon interference sampling measurements [0.0]
  We present a quantum sensing scheme achieving the ultimate quantum sensitivity in the estimation of the transverse displacement between two photons interfering at a balanced beam splitter. This scheme can possibly lead to enhanced high-precision nanoscopic techniques, such as super-resolved single-molecule localization microscopy with quantum dots.
  arXiv  Detail & Related papers  (2023-09-13T11:18:00Z)
• Enhanced optomechanical interaction in the unbalanced interferometer [40.96261204117952]
  Quantum optomechanical systems enable the study of fundamental questions on quantum nature of massive objects. Here we propose a modification of the Michelson-Sagnac interferometer, which allows to boost the optomechanical coupling strength.
  arXiv  Detail & Related papers  (2023-05-11T14:24:34Z)
• Gate-based spin readout of hole quantum dots with site-dependent $g-$factors [101.23523361398418]
  We experimentally investigate a hole double quantum dot in silicon by carrying out spin readout with gate-based reflectometry. We show that characteristic features in the reflected phase signal arising from magneto-spectroscopy convey information on site-dependent $g-$factors in the two dots.
  arXiv  Detail & Related papers  (2022-06-27T09:07:20Z)
• Quantifying n-photon indistinguishability with a cyclic integrated interferometer [40.24757332810004]
  We report on a universal method to measure the genuine indistinguishability of n-photons. Our approach relies on a low-depth cyclic multiport interferometer with N = 2n modes. We experimentally demonstrate this technique for a 8-mode integrated interferometer fabricated using femtosecond laser micromachining.
  arXiv  Detail & Related papers  (2022-01-31T16:30:52Z)
• Quantum asymmetry and noisy multi-mode interferometry [55.41644538483948]
  Quantum asymmetry is a physical resource which coincides with the amount of coherence between the eigenspaces of a generator. We show that the asymmetry may emphincrease as a result of a emphdecrease of coherence inside a degenerate subspace.
  arXiv  Detail & Related papers  (2021-07-23T07:30:57Z)
• Two-photon resonance fluorescence of two interacting non-identical quantum emitters [77.34726150561087]
  We study a system of two interacting, non-indentical quantum emitters driven by a coherent field. We show that the features imprinted by the two-photon dynamics into the spectrum of resonance fluorescence are particularly sensitive to changes in the distance between emitters. This can be exploited for applications such as superresolution imaging of point-like sources.
  arXiv  Detail & Related papers  (2021-06-04T16:13:01Z)
• Quantum-limited Localisation and Resolution in Three Dimensions [10.824994978916815]
  We determine the ultimate potential of quantum-limited imaging for improving the resolution of a far-field, diffraction-limited approximation. Our results give the upper bounds on certain far-field imaging technology and will find wide applications from microscopy to astrometry.
  arXiv  Detail & Related papers  (2020-12-09T14:44:56Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.