State preparation and detector effects in quantum measurements of rotation with circular polarization-entangled photons and photon counting

Cen, Longzhu; Zhang, Zijing; Zhang, Jiandong; Li, Shuo; Sun, Yifei; Yan, Linyu; Zhao, Yuan; Wang, Rui

doi:10.1103/physreva.96.053846

Cited by 12 publications

(14 citation statements)

References 30 publications

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“…Introduction.-Metrology is an ancient as well as modern subject committed to achieving sensitive parameter estimation. One of the useful tools is a U(2) interferometer [1,2], which can be used to estimate many slight variations on physical quantities, such as phase shifts [3][4][5][6][7], polarized rotations [8][9][10][11], and angular displacements [12,13]. In this regard, there exists a famous theorem on sensitivity limit referred as to the SNL [14]: The optimal sensitivity of a U(2) interferometer fed with an arbitrary single-mode state scales as 1/ √ N with N being photon number inside the interferometer.…”

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confidence: 99%

Classical Inputs and Measurements Enable Phase Sensitivity beyond the Shot-Noise Limit

Zhang¹,

Zhang²,

Cen³

et al. 2020

Preprint

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confidence: 99%

Classical Inputs and Measurements Enable Phase Sensitivity beyond the Shot-Noise Limit

Zhang¹,

Zhang²,

Cen³

et al. 2020

Preprint

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“…Thus, the development of polarization sensors for detecting circularly or linearly polarized light has attracted intensive attention in recent years because such sensors could presumably be used to visualize the birefringence and stress of objects. [25][26][27][28] However, in the structure of existing polarization sensors, a polarizer array is stacked on a photodiode and the polarization direction is separated for each pixel, resulting in reduced detection sensitivity and a lower extinction ratio. The detection of CPL requires a quarter-wavelength plate, which substantially reduces sensitivity; this design has consequently not been implemented in practice.…”

Section: Direct Detection Of Circular Polarized Light In Organic-inorganic Hybrid Thin Films With a Onedimensional (1d) Helical Structurementioning

confidence: 99%

Development of Photofunctional Devices Based on Organic–Inorganic Hybrid Structures

Ishii¹

2021

Electrochemistry

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In this research, organic-inorganic hybrid materials that enable the detection and manipulation of "invisible light" such as weak light, polarized light, and near-infrared (NIR) light are prepared and optoelectronic devices based on these materials are developed. The photoelectric conversion or energy transfer process resulting from light absorption is precisely controlled at the heterointerface of organicinorganic hybrid structures, which enables the highly efficient amplification, conversion, and detection of invisible light under normal temperatures and pressures. Here, novel optical functions and devices based on organic-inorganic hybrid structures and interfaces are presented. For instance, in a hybrid structure in which organic molecules and inorganic semiconductors are chemically bonded, photocurrent was amplified more than 2000-fold at their heterointerface, resulting in highly sensitive photodetection at a low voltage (<1V). As a novel device structure for the direct detection of circularly polarized light with high sensitivity, an inorganic crystal thin film with a one-dimensional helical structure was fabricated via interaction with organic chiral molecules. For NIR light, dye-sensitized up-conversion nanoparticles that can convert NIR light as weak as sunlight into visible light with high efficiency were developed and incorporated into a perovskite-based visible-light detector. This device detected light in the NIR region through energy conversion from NIR to visible light. NIR light was promoted as ultrabright luminescence by one-photon absorption two-photon emission (quantum-cutting) process in heterometal hybridized crystal thin films. A light-emitting diode was fabricated and demonstrated 6% external conversion efficiency of field emission in the NIR region.

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“…In recent years, apart from phase estimation, there has been a surge in interest in estimation of angular displacement as another degree of freedom and has received wide attention [1][2][3][4][5][6][7][8][9][10]. Angular displacement can be divided into two distinct physical scenarios, one is the rotation of the polarization [4,6] and the other is the relative rotation of the light axis [1-3, 5, 7-10]. Rotation of the polarization is often caused by birefringence effect of wave plates or Faraday magneto-optical rotation effect of optical crystals.…”

Section: Introductionmentioning

confidence: 99%

“…For the first case, Malus law and shot-noise limit (SNL) are the representations of the classical metrology. A great deal of work has been done to improve such sensitivity [4,6,12,13]. It has been shown that the sensitivity can be boosted by using N00N state [4] or two-mode squeezed vacuum [6] along with quantum detection strategy.…”

Section: Introductionmentioning

confidence: 99%

“…A great deal of work has been done to improve such sensitivity [4,6,12,13]. It has been shown that the sensitivity can be boosted by using N00N state [4] or two-mode squeezed vacuum [6] along with quantum detection strategy. As to the latter one, also the angular displacement type we study in this paper, spin angular momentum (SAM) [14] and orbital angular momentum (OAM) [15] of light are usually utilized.…”

Section: Introductionmentioning

confidence: 99%

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Super-sensitive angular displacement estimation via an SU(1,1)-SU(2) hybrid interferometer

et al. 2018

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In this paper, we propose a protocol for angular displacement estimation based upon orbital angular momentum coherent state and a SU(1,1)-SU(2) hybrid interferometer. This interferometer consists of an optical parametric amplifier, a beam splitter and reflection mirrors, hereon we use a quantum detection strategy −− balanced homodyne detection. The results indicate that superresolution and super-sensitivity can be realized with ideal condition. Additionally, we study the impact of photon loss on the resolution and the sensitivity, and the robustness of our protocol is also discussed. Finally, we demonstrate the advantage of our protocol over SU(1,1) and summarize the merits of orbital angular momentum-enhanced protocol.

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State preparation and detector effects in quantum measurements of rotation with circular polarization-entangled photons and photon counting

Cited by 12 publications

References 30 publications

Classical Inputs and Measurements Enable Phase Sensitivity beyond the Shot-Noise Limit

Classical Inputs and Measurements Enable Phase Sensitivity beyond the Shot-Noise Limit

Development of Photofunctional Devices Based on Organic–Inorganic Hybrid Structures

Super-sensitive angular displacement estimation via an SU(1,1)-SU(2) hybrid interferometer

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