Enhancing LIDAR performance metrics using continuous-wave photon-pair sources

Liu, Han; Giovannini, Daniel; He, Hongyu; England, Duncan; Sussman, Benjamin J.; Balaji, Bhashyam; Helmy, Amr S.

doi:10.1364/optica.6.001349

Cited by 60 publications

(23 citation statements)

References 21 publications

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“…Simon et al (2017)]. Among these one can remark, for example, EPR realization (Howell et al 2004), the entanglement generation (Kwiat et al 1995;Forbes et al 2017), quantum state teleportation (Kim et al 2001), quantum ellipsometry (Toussaint et al 2004;Paterova et al 2018), quantum illumination (Lopaeva et al 2013;Lloyd 2008;Durak et al 2019;England et al 2019;Bowell et al 2020;Brandsema et al 2020;Liu and Helmy 2020;Liu et al 2019), quantum spectroscopy (Yabushita and Kobayashi 2004;Kalachev et al 2008;Kalashnikov et al 2016;Dorfman, et al 2016), squeezing generation (Iskhakov et al 2016), quantum imaging (Brida et al 2010;Asbana et al 2019;Shih 2008;Padgett and Boyd 2017;Aspden 2015), quantum communication (Ursin et al 2007;Cao et al 2013;Resch et al 2005;Buttler et al 1998;Hughes et al 2002;Jennewein et al 2000;Erven 2012;Gerhardt1 et al 2011;Gisin et al 2002;Calderaro et al 2019), nonlocal realism tests (Howell et al 2004;Schneeloch 2015;Paterek et al 2007;Groblacher et al 2007;Dehlinger and Mitc...…”

Section: Introductionmentioning

confidence: 99%

Measurement of entropy and quantum coherence properties of two type-I entangled photonic qubits

2021

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Using the type-I SPDC process in BBO nonlinear crystal, we generate a polarization-entangled state near to the maximally-entangled Bell-state with high-visibility (high-brightness) 98.50 ± 1.33% (87.71 ± 4.45%) for HV (DA) basis. We calculate the CHSH version of the Bell inequality, as a nonlocal realism test, and find a strong violation from the classical physics or any hidden variable theory, S = 2.71 ± 0.10. Via measuring the coincidence count rate in the SPDC process, we obtain the quantum efficiency of single-photon detectors around (25.5 ± 3.4)%, which is in good agreement to their manufacturer company. As expected, we verify the linear dependency of the CC rate vs. pump power of input CW-laser, which may yield to find the effective second-order susceptibility crystal. Using the theory of the measurement of qubits, includes a tomographic reconstruction of quantum states due to the linear set of 16 polarization-measurement, together with a maximum-likelihood-technique, which is based on the numerical optimization, we calculate the physical non-negative definite density matrices, which implies on the non-separability and entanglement of prepared state. By having the maximum likelihood density operator, we calculate precisely the entanglement measures such as Concurrence, entanglement of formation, tangle, logarithmic negativity, and different entanglement entropies such as linear entropy, Von-Neumann entropy, and Renyi 2-entropy. Finally, this high-brightness and low-rate entangled photons source can be used for short-range quantum measurements in the Lab.

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Section: Introductionmentioning

confidence: 99%

Measurement of entropy and quantum coherence properties of two type-I entangled photonic qubits

2021

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“…It is interesting that very recently the measurement of the delayed intensity correlation function for the bi‐photon entangled illumination field has been shown (both theoretically and experimentally) to provide large gain in comparison with uncorrelated illumination field for the target detection. [ 193 ]…”

Section: Applications Of Quantum Antennasmentioning

confidence: 99%

Quantum Antennas

2020

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Due to the recent groundbreaking developments of nanotechnologies, it became possible to create intrinsically quantum systems able to serve as high-directional antennas in terahertz, infrared, and optical ranges. In fact, the quantum antennas, as devices shaping light on the level of single quanta, have already become key elements in nanooptics and nanoelectronics. The quantum antennas are actively researched for possible implementations in quantum communications, quantum imaging and sensing, and energy harvesting. However, the design and optimization of these emitting/receiving devices are still rather undeveloped in comparison with the well-known methods for conventional radio-frequency antennas. This review provides a discussion of the recent achievements in the concept of the quantum antenna as an open quantum system emitting via interaction with a photonic reservoir. The review is focused on bridging the gap between quantum antennas and their macroscopic classical analogues. Furthermore, the way of quantum-antenna implementation is discussed for different configurations, based on such materials as plasmonic metals, carbon nanotubes, and semiconductor quantum dots.

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“…[3]). Among these one can remark, for example, EPR realization [4], the entanglement generation [5,6], quantum state teleportation [7], quantum ellipsometry [8,9], quantum illumination [10][11][12][13][14][15][16][17], quantum spectroscopy [18][19][20][21], squeezing generation [22], quantum imaging [23][24][25][26][27], quantum communication [28][29][30][31][32][33][34][35][36][37], nonlocal realism tests [4,[38][39][40][41][42].…”

Section: Introductionmentioning

confidence: 99%

Measurement of Entropy and Quantum Coherence Properties of Two Type-I Entangled Photonic Qubits

Motazedifard

Madani

Vayaghan

2021

Preprint

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Using the type-I SPDC process in BBO nonlinear crystal (NLC), we generate a polarization-entangled state near to the maximally-entangled Bell-state with high-visibility (high-brightness) 98.50 ±1.33 % (87.71 ± 4.45 %) for HV (DA) basis. We calculate the CHSH version of the Bell inequality, as a nonlocal realism test, and find a strong violation from the classical physics or any hidden variable theory (HVT), S= 2.71±0.10. Via measuring the coincidence count (CC) rate in the SPDC process, we obtain the quantum efficiency of single-photon detectors (SPDs) around (25.5 ±3.4)% , which is in good agreement to their manufacturer company. As expected, we verify the linear dependency of the CC rate vs. pump power of input CW-laser, which may yield to find the effective second-order susceptibility crystal. Using the theory of the measurement of qubits, includes a tomographic reconstruction of quantum states due to the linear set of 16 polarization-measurement, together with a maximum-likelihood-technique (MLT), which is based on the numerical optimization, we calculate the physical non-negative definite density matrices, which implies on the non-separability and entanglement of prepared state. By having the maximum likelihood density operator, we calculate precisely the entanglement measures such as Concurrence, entanglement of formation, tangle, logarithmic negativity, and different entanglement entropies such as linear entropy, Von-Neumann entropy, and Renyi 2-entropy. Finally, this high-brightness and low-rate entangled photons source can be used for short-range quantum measurements in the Lab.

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Enhancing LIDAR performance metrics using continuous-wave photon-pair sources

Cited by 60 publications

References 21 publications

Measurement of entropy and quantum coherence properties of two type-I entangled photonic qubits

Measurement of entropy and quantum coherence properties of two type-I entangled photonic qubits

Quantum Antennas

Measurement of Entropy and Quantum Coherence Properties of Two Type-I Entangled Photonic Qubits

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