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19 pages, 5655 KB

Open AccessArticle

Deterministic Shaping of Quantum Light Statistics

by Garrett D. Compton and Mark G. Kuzyk

Photonics 2024, 11(4), 287; https://doi.org/10.3390/photonics11040287 - 22 Mar 2024

Cited by 2 | Viewed by 1707

We propose a theoretical method for the deterministic shaping of quantum light via photon number state selective interactions. Nonclassical states of light are an essential resource for high-precision optical techniques that rely on photon correlations and noise reshaping. Notable techniques include quantum enhanced interferometry, ghost imaging, and generating fault-tolerant codes for continuous variable optical quantum computing. We show that a class of nonlinear-optical resonators can transform many-photon wavefunctions to produce structured states of light with nonclassical noise statistics. The devices, based on parametric down conversion, utilize the Kerr effect to tune photon-number-dependent frequency matching, inducing photon-number-selective interactions. With a high-amplitude coherent pump, the number-selective interaction shapes the noise of a two-mode squeezed cavity state with minimal dephasing, illustrated with simulations. We specify the requisite material properties to build the device and highlight the remaining material degrees of freedom which offer flexible material design. Full article

(This article belongs to the Special Issue Editorial Board Members' Collection Series: Nonlinear Photonics)

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10 pages, 1202 KB

Open AccessArticle

Effects of Energy Dissipation and Deformation Function on the Entanglement, Photon Statistics and Quantum Fisher Information of Three-Level Atom in Photon-Added Coherent States for Morse Potential

by Sayed Abdel-Khalek, Eied M. Khalil, Hammad Alotaibi, Sayed M. Abo-Dahab, Emad E. Mahmoud, Mahmoud Higazy and Marin Marin

Symmetry 2021, 13(11), 2188; https://doi.org/10.3390/sym13112188 - 16 Nov 2021

Cited by 4 | Viewed by 1984

Abstract

The present research paper considers a three-level atom (3LA) that interacts with a field mode primarily in a photon-added coherent state of Morse potential (PACSMP). The dynamics of entanglement, the photon statistics, and the quantum Fisher information are investigated. The statistics of field photons are discussed by evaluating the Mandel parameter. We check the influence of the energy dissipation and intensity-dependent function. Finally, we detect the relationship between the entanglement, the field’s nonclassical characteristics, and atomic quantum Fisher information throughout the evolution of time. The findings illustrate the important role of the number of added photons and CSMP in affecting the entanglement’s time evolution, the quantum Fisher information, and the Mandel parameter. Based on the obtained results, we reached significant physical phenomena, including the sudden birth and death of the nonlocal correlation between atom-Morse potential field structures. Full article

(This article belongs to the Section Mathematics)

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12 pages, 1979 KB

Open AccessArticle

Quantum-Optical Spectrometry in Relativistic Laser–Plasma Interactions Using the High-Harmonic Generation Process: A Proposal

by Theocharis Lamprou, Rodrigo Lopez-Martens, Stefan Haessler, Ioannis Liontos, Subhendu Kahaly, Javier Rivera-Dean, Philipp Stammer, Emilio Pisanty, Marcelo F. Ciappina, Maciej Lewenstein and Paraskevas Tzallas

Photonics 2021, 8(6), 192; https://doi.org/10.3390/photonics8060192 - 29 May 2021

Cited by 13 | Viewed by 4466

Abstract

Quantum-optical spectrometry is a recently developed shot-to-shot photon correlation-based method, namely using a quantum spectrometer (QS), that has been used to reveal the quantum optical nature of intense laser–matter interactions and connect the research domains of quantum optics (QO) and strong laser-field physics (SLFP). The method provides the probability of absorbing photons from a driving laser field towards the generation of a strong laser–field interaction product, such as high-order harmonics. In this case, the harmonic spectrum is reflected in the photon number distribution of the infrared (IR) driving field after its interaction with the high harmonic generation medium. The method was implemented in non-relativistic interactions using high harmonics produced by the interaction of strong laser pulses with atoms and semiconductors. Very recently, it was used for the generation of non-classical light states in intense laser–atom interaction, building the basis for studies of quantum electrodynamics in strong laser-field physics and the development of a new class of non-classical light sources for applications in quantum technology. Here, after a brief introduction of the QS method, we will discuss how the QS can be applied in relativistic laser–plasma interactions and become the driving factor for initiating investigations on relativistic quantum electrodynamics. Full article

(This article belongs to the Special Issue Quantum Optics in Strong Laser Fields)

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18 pages, 1499 KB

Open AccessFeature PaperArticle

Conditional Measurements with Silicon Photomultipliers

by Giovanni Chesi, Alessia Allevi and Maria Bondani

Appl. Sci. 2021, 11(10), 4579; https://doi.org/10.3390/app11104579 - 17 May 2021

Cited by 3 | Viewed by 1973

Abstract

Nonclassical states of light can be efficiently generated by performing conditional measurements. An experimental setup including Silicon Photomultipliers can currently be implemented for this purpose. However, these devices are affected by correlated noise, the optical cross talk in the first place. Here we explore the effects of cross talk on the conditional states by suitably expanding our existing model for conditional measurements with photon-number-resolving detectors. We assess the nonclassicality of the conditional states by evaluating the Fano factor and provide experimental evidence to support our results. Full article

(This article belongs to the Special Issue Basics and Applications in Quantum Optics)

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12 pages, 763 KB

Open AccessFeature PaperArticle

Tailoring Asymmetric Lossy Channels to Test the Robustness of Mesoscopic Quantum States of Light

by Alessia Allevi and Maria Bondani

Appl. Sci. 2020, 10(24), 9094; https://doi.org/10.3390/app10249094 - 19 Dec 2020

Cited by 8 | Viewed by 1987

Abstract

In the past twenty years many experiments have demonstrated that quantum states of light can be used for secure data transfer, despite the presence of many noise sources. In this paper we investigate, both theoretically and experimentally, the role played by a statistically-distributed asymmetric amount of loss in the degradation of nonclassical photon-number correlations between the two parties of multimode twin-beam states in the mesoscopic intensity regime. To be as close as possible to realistic scenarios, we consider two different statistical distributions of such a loss, a Gaussian distribution and a log-normal one. The results achieved in the two cases show to what extent the involved parameters, both those connected to loss and those describing the employed states of light, preserve nonclassicality. Full article

(This article belongs to the Special Issue Basics and Applications in Quantum Optics)

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4 pages, 270 KB

Open AccessProceeding Paper

Preserving Nonclassicality in Noisy Communication Channels

by Alessia Allevi and Maria Bondani

Proceedings 2019, 12(1), 3; https://doi.org/10.3390/proceedings2019012003 - 25 Jun 2019

Viewed by 1375

Abstract

Nowadays, the transmission of quantum information, especially for the distribution of cryptographic keys, is required on a global scale. The main obstacle to overcome in free-space communication is the presence of turbulence, which causes both spatial and temporal deformations of the light signals that code information. Here we investigate the extent at which the transmission of mesoscopic twin-beam states through asymmetric noisy channels degrades the nonclassical nature of the photon-number correlations between signal and idler. We consider three nonclassicality criteria, all written in terms of measurable quantities, and demonstrate, both theoretically and experimentally, that the asymmetry introduced by losses affects the three criteria in different ways. Full article

(This article belongs to the Proceedings of 11th Italian Quantum Information Science conference (IQIS2018))

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14 pages, 745 KB

Open AccessFeature PaperArticle

Second Harmonic Revisited: An Analytic Quantum Approach

by Giovanni Chesi, Matteo M. Wauters, Nadir Fasola, Alessia Allevi and Maria Bondani

Appl. Sci. 2019, 9(8), 1690; https://doi.org/10.3390/app9081690 - 24 Apr 2019

Cited by 7 | Viewed by 2764

Abstract

We address the second-harmonic generation process in a quantum frame. Starting with a perturbative approach, we show that it is possible to achieve a number of analytic results, ranging from the up-conversion probability to the statistical properties of the generated light. In particular, the moments and the correlations of the photon-number distribution of the second-harmonic light generated by any initial state are retrieved. When possible, a comparison with the results achieved with the classical regime is successfully provided. The nonclassicality of some benchmark states is investigated by inspecting the corresponding autocorrelation function. Full article

(This article belongs to the Special Issue Quantum Optics for Fundamental Quantum Mechanics)

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