Article
Physics, Multidisciplinary
Rishi N. Patel, Timothy P. McKenna, Zhaoyou Wang, Jeremy D. Witmer, Wentao Jiang, Raphael Van Laer, Christopher J. Sarabalis, Amir H. Safavi-Naeini
Summary: Researchers have successfully performed single phonon addition and subtraction on a room-temperature mechanical oscillator using a cavity-optomechanical approach. Through strong quantum measurement and a tomography scheme, they observed highly non-Gaussian phase-space distributions and confirmed the counterintuitive doubling of the mean phonon number resulting from phonon addition and subtraction.
PHYSICAL REVIEW LETTERS
(2021)
Article
Optics
Naeem Akhtar, Jizhou Wu, Jia-Xin Peng, Wu-Ming Liu, Gao Xianlong
Summary: In this study, we introduce compasslike states that may have connection to contemporary experiments by adding or subtracting photons from a superposition of squeezed-vacuum states. The Wigner functions of these states show phase-space structures much smaller than the Planck scale when a significant quantity of photons is added or subtracted. Additionally, these states exhibit much higher sensitivity to displacements than the standard quantum limit. The size of the sub-Planck structures and the sensitivity of the states are strongly influenced by the average photon number, with the photon-addition case having a higher average photon number leading to smaller sub-Planck structures and greater sensitivity to displacement than the photon-subtraction case.
Article
Physics, Multidisciplinary
Deepak, Arpita Chatterjee
Summary: In this paper, the higher and lower-order nonclassicalities of photon-added then-subtracted and photon-subtracted-then-added thermal and even coherent states are studied. Different criteria are used to witness the nonclassical feature, and it is found that the considered states are highly nonclassical. The non-Gaussian photon-addition-then-subtraction operation is also preferred over the photon-subtraction-then-addition for developing nonclassicality.
INDIAN JOURNAL OF PHYSICS
(2023)
Article
Engineering, Electrical & Electronic
Duc Minh Truong, Chuong Sy Ho, Dat Quang Tran
Summary: A new state called PAASTMPCS is introduced in this study, which enhances the nonclassical and non-Gaussian properties of a pair coherent state by simultaneously adding and subtracting photons. It is confirmed to be an entangled state based on the linear entropy criterion. The results indicate that using PAASTMPCS as an entangled resource has potential in quantum teleportation processes.
JOURNAL OF COMPUTATIONAL ELECTRONICS
(2021)
Article
Optics
Li-Li Hou, Jian-Dong Zhang, Shuai Wang
Summary: We investigate the parity-based phase estimation and quantum Fisher information in an SU(1,1) interferometer with different phase configurations. We show that the measurement signal remains the same for arbitrary phase configurations if the sum of estimated phases in both arms of the interferometer is fixed. By using a coherent state and a photon-subtracted squeezed vacuum state (PSSVS) as the input state, we demonstrate the advantage of improving phase sensitivity with the PSSVS compared to the squeezed vacuum state (SVS). Furthermore, we analyze the quantum Fisher information of the PSSVS and compare it with the optimal phase sensitivity.
OPTICS COMMUNICATIONS
(2023)
Article
Optics
Mohammad Javad Faghihi
Summary: In this paper, the f-deformed photon-added-then-subtracted SU(1,1) and SU(2) displaced number states are introduced using nonlinear coherent states and group theoretical approaches. Various types of nonclassical states are obtained by selecting controlling parameters, and the nonclassicality features are evaluated through photon statistics, quadrature squeezing, and the Wigner-Weyl quasi-probability distribution function. It is concluded that the depth and domain of nonclassicality features can be controlled by selecting suitable parameters.
Article
Materials Science, Multidisciplinary
K. Berrada, A. Sabik, H. Eleuch
Summary: In this paper, the photon-added deformed spin coherent states (PA-DSCSs) are constructed based on the deformed spin algebra (DSA). A method for solving the unity operator problem is presented and solutions for specific cases are given. The obtained states are expressed using the Holstein-Primakoff (HP) realization of the DSA. The statistical properties of the coherent states are analyzed by varying the Mandel's parameter. The bipartite entanglement with respect to different parameters of these states is investigated using the PA-DSCSs.
RESULTS IN PHYSICS
(2023)
Article
Optics
Miller Eaton, Rajveer Nehra, Aye Win, Olivier Pfister
Summary: The proposed Heisenberg-limited quantum interferometer uses twin optical beams with indistinguishably subtracted photons to achieve Heisenberg-limited performance and direct fringe reading. A feasible experimental realization using photon-number correlated sources, such as nondegenerate parametric down-conversion, was proposed for performance analysis in the presence of loss and detector inefficiency.
Article
Optics
Thi Hong Thanh Le, Sy Chuong Ho, Quang Dat Tran, Minh Duc Truong
Summary: In this paper, a new non-Gaussian state called superposition of photon-added pair coherent state (SPAPCS) is introduced by adding photons to two modes of a pair coherent state (PCS). It is shown that the SPAPCS exhibits enhanced non-Gaussian characteristics by testing its Wigner function. The SPAPCS is used as a field to study dynamical entanglement in a dispersive two-mode Jaynes-Cummings model in the presence of phase damping effect. The degree of dynamical entanglement in the global system and subsystems is evaluated using the linear entropy criteria. Results demonstrate that the dynamical entanglement can be enhanced by both the phase damping effect and the addition of photons to the field in SPAPCS.
LASER PHYSICS LETTERS
(2023)
Article
Physics, Multidisciplinary
J. Andrijauskas, J. Vogel, A. Mokhberi, F. Schmidt-Kaler
Summary: In this study, Rydberg series spectroscopy was performed on a single trapped Ca-40(+) ion to determine the ionization energy and quantum defect values, confirming their scaling properties for Rydberg ions. The precise spectroscopic data obtained can be used for unambiguous addressing of Rydberg levels of Ca+ ions, further facilitating quantum information processing.
PHYSICAL REVIEW LETTERS
(2021)
Article
Optics
G. Avosopiants, B. Bantysh, K. G. Katamadze, N. A. Bogdanova, Yu Bogdanov, S. P. Kulik
Summary: Thermal states of light are commonly used in quantum optics to study various quantum phenomena, including photon creation and annihilation operations. This paper introduces a technique for statistical parameter estimation of multimode multiphoton-subtracted thermal states, which can be applied to the multimode photon annihilation test.
Article
Quantum Science & Technology
Ryotatsu Yanagimoto, Rajveer Nehra, Ryan Hamerly, Edwin Ng, Alireza Marandi, Hideo Mabuchi
Summary: This work proposes a nonlinear-optical method for room-temperature ultrafast photon-number-resolving quantum nondemolition (QND) measurement using quadratic non-linear interactions. By measuring the coherent pump field driving a frequency-detuned optical parametric amplifier (OPA), a QND measurement of the signal Bogoliubov excitations can be obtained, projecting the signal mode to a squeezed photon-number state. The nonlinear OPA dynamics can be utilized to deterministically generate Gottesman-Kitaev-Preskill states and offer an all-optical route for fault-tolerant quantum information processing in continuous-variable systems.
Article
Optics
Anaelle Hertz, Stephan De Bievre
Summary: Photon addition and subtraction can transform Gaussian states into non-Gaussian states. We quantitatively analyze the change in nonclassicality by examining the Wigner negativity and quadrature coherence scale (QCS) of the resulting states. The QCS, a recently introduced measure of nonclassicality, increases relative to photon addition and subtraction, with a maximum increase of 200%. This implies that the process of degaussification and the associated increase in nonclassicality come at a cost of increased susceptibility to environmental decoherence. Our results are based on explicit and general expressions for the characteristic and Wigner functions of photon-added and-subtracted single-and multimode Gaussian states, for which we provide a simple derivation. These expressions also allow us to confirm the quantum non-Gaussianity of photon-subtracted states with positive Wigner functions.
Article
Optics
Song Yang, Shengli Zhang
Summary: In this work, we investigate the loophole-free Bell inequality test using a multi-photon subtracted two-mode squeezed state (TMSS). By applying ideal bi-side five-photon subtractions, we achieve a violation of the Bell inequality that approaches Munro's optimal bound. Additionally, we develop a concise phase-space method for deriving the violation of the loophole-free Bell inequality, providing physically implementable states for experimental realization.
Article
Optics
Qiang Hu, Taximaiti Yusufu, Yusuf Turek
Summary: State preparation through postselected weak measurements in a three-wave mixing process is studied. The results show that by detecting single photons in the idler beam's output channels, the signal output channels can be prepared in different states with high fidelity. Additionally, properties such as squeezing, signal amplification, second-order correlation, and the Wigner functions of the output states are investigated.
Article
Physics, Applied
L. La Volpe, S. De, M. I. Kolobov, V. Parigi, C. Fabre, N. Treps, D. B. Horoshko
Summary: The paper theoretically investigates the generation of two entangled beams of light in the process of single-pass type-I noncollinear frequency-degenerate parametric down-conversion with an ultrashort pulsed pump. It finds the spatiotemporal squeezing eigenmodes and squeezing eigenvalues of the generated field numerically and analytically, showing that the method is highly efficient and in good agreement with numerical solutions. The study also reveals a spatiotemporal coupling of modal functions when the total bandwidth of the generated beams is sufficiently high, which can be increased by shortening the pump duration.
PHYSICAL REVIEW APPLIED
(2021)
Article
Physics, Multidisciplinary
Alex O. C. Davis, Mattia Walschaers, Valentina Parigi, Nicolas Treps
Summary: Mesoscopic photon counters offer practical advantages over single-photon level conditioning detectors in preparing non-Gaussian states. A novel approach involving displacement of the ancilla field into the regime where mesoscopic detectors can be used shows potential for preparing states with strong Wigner negativity at high rates under experimentally attainable conditions.
NEW JOURNAL OF PHYSICS
(2021)
Article
Physics, Multidisciplinary
V Roman-Rodriguez, B. Brecht, K. Srinivasan, C. Silberhorn, N. Treps, E. Diamanti, V Parigi
Summary: Configurable and scalable continuous variable quantum networks for measurement-based quantum information protocols can be obtained via parametric down conversion in non-linear waveguides, with the use of symmetric group velocity matching. By identifying type II PDC in a single waveguide as the best suited process, multiple modes with non-negligible amount of squeezing can be obtained, paving the way toward large-scale quantum networks in the CV regime.
NEW JOURNAL OF PHYSICS
(2021)
Article
Engineering, Aerospace
Giacomo Sorelli, Nicolas Treps, Frederic Grosshans, Fabrice Roust
Summary: This tutorial aims to address the issue of obscurity faced by radar engineers in understanding the research on quantum radar. It provides a review of the main advances in quantum radar literature and a thorough introduction to the necessary background knowledge of quantum optics.
IEEE AEROSPACE AND ELECTRONIC SYSTEMS MAGAZINE
(2022)
Article
Physics, Multidisciplinary
Ganael Roeland, Srinivasan Kaali, Victor Roman Rodriguez, Nicolas Treps, Valentina Parigi
Summary: In this study, a general framework for single-photon addition on multimode states of light via parametric down conversion (PDC) processes is developed. The analytical conditions for single-mode and mode-selective photon addition are identified. Numerical results for photon addition in PDC process at near-infrared and telecommunications wavelengths are presented.
NEW JOURNAL OF PHYSICS
(2022)
Article
Optics
Yifan Sun, Yann Bouchereau, Sopfy Karuseichyk, Matthieu Ansquer, Sylvain Combrie, Nicolas Treps, Alfredo De Rossi, Fabien Bretenaker
Summary: In this study, the noise properties of harmonic cavity nanolasers were theoretically investigated by introducing a model of coupled equations of evolution of the modes, considering spontaneous emission. The influence of different laser parameters on the noise of the mode-locked regime was discussed in detail, shedding light on the noise characteristics in both continuous wave and mode-locked regimes.
Article
Quantum Science & Technology
Yu Xiang, Shuheng Liu, Jiajie Guo, Qihuang Gong, Nicolas Treps, Qiongyi He, Mattia Walschaers
Summary: This study investigates the remote creation and distribution of Wigner negativity in the multipartite scenario. It provides an intuitive method to quantify remotely generated Wigner negativity in the context of photon subtraction, and paves the way for utilizing Wigner negativity as a valuable resource in quantum information protocols based on non-Gaussian scenarios.
NPJ QUANTUM INFORMATION
(2022)
Article
Physics, Multidisciplinary
Ali Golestani, Alex O. C. Davis, Filip Sosnicki, Michal Mikolajczyk, Nicolas Treps, Michal Karpinski
Summary: This article introduces a new technique called Fourier transform chronometry, which acquires the temporal envelope of ultrashort optical pulses by measuring the frequency autocorrelation of the optical field. Experimental results show that this technique can successfully measure the pulse envelope of classical and single-photon light pulses.
PHYSICAL REVIEW LETTERS
(2022)
Article
Quantum Science & Technology
Mattia Walschaers, Bhuvanesh Sundar, Nicolas Treps, Lincoln D. Carr, Valentina Parigi
Summary: We use complex network theory to study a class of photonic continuous variable quantum states that have both multipartite entanglement and non-Gaussian statistics. These states are created from an initial imprinted cluster state via Gaussian entangling operations according to a complex network structure, and then non-Gaussian statistics are generated through multiple photon subtraction operations on a single node. We investigate the emergent network of photon-number correlations through complex network measures, and show that the structure of the imprinted network greatly influences the emergent structure.
QUANTUM SCIENCE AND TECHNOLOGY
(2023)
Article
Physics, Multidisciplinary
Giacomo Sorelli, Manuel Gessner, Mattia Walschaers, Nicolas Treps
Summary: We analytically determine the quantum Cramer-Rao bound for estimating the separation between two point sources in arbitrary Gaussian states. Our analysis is applicable for arbitrary source brightness and examines how different resources affect the ultimate resolution limit with the number of emitted photons. In practical scenarios, coherent states of the sources achieve quantum optimal resolution.
PHYSICAL REVIEW RESEARCH
(2022)
Article
Physics, Multidisciplinary
Ilya Karuseichyk, Giacomo Sorelli, Mattia Walschaers, Nicolas Treps, Manuel Gessner
Summary: This paper analyzes the problem of resolving two mutually coherent point sources with arbitrary quantum statistics, mutual phase, and relative and absolute intensity. A sensitivity measure based on the method of moments is used, and direct imaging is compared with spatial-mode demultiplexing (SPADE), demonstrating the advantage of the latter. The paper shows that the moment-based sensitivity of SPADE saturates the quantum Fisher information for all known cases, even for non-Gaussian states of the sources.
PHYSICAL REVIEW RESEARCH
(2022)
Article
Quantum Science & Technology
Carlos E. Lopetegui, Manuel Gessner, Matteo Fadel, Nicolas Treps, Mattia Walschaers
Summary: This paper proposes a protocol based on Fisher information for detecting non-Gaussian steering in general continuous-variable bipartite states. It proves to be more effective compared to methods using Gaussian features like the covariance matrix.
Article
Quantum Science & Technology
Kun Zhang, Jietai Jing, Nicolas Treps, Mattia Walschaers
Summary: This work investigates the effect of photon subtraction on the entanglement of Gaussian states of light using an entanglement measure. The results show that single-photon subtraction can increase the bipartite entanglement by a maximum of log 2, which is consistent with the maximal amount achievable with one photon. This upper bound is applicable to all Gaussian input states, regardless of the number of modes and purity.
Proceedings Paper
Engineering, Electrical & Electronic
Ganael Roeland, Ulysse Chabaud, Mattia Walschaers, Frederic Grosshans, Valentina Parigi, Damian Markham, Nicolas Treps
2021 CONFERENCE ON LASERS AND ELECTRO-OPTICS EUROPE & EUROPEAN QUANTUM ELECTRONICS CONFERENCE (CLEO/EUROPE-EQEC)
(2021)
Article
Optics
Giacomo Sorelli, Manuel Gessner, Mattia Walschaers, Nicolas Treps
Summary: In this work, a simple superresolution protocol is introduced to estimate the separation between two thermal sources using the average value of a single accessible observable. The method is shown to saturate the Cramer-Rao bound even in the presence of noise.
