Review
Engineering, Electrical & Electronic
Lukas Lachman, Radim Filip
Summary: This review introduces the theoretical analyses and applications of quantum non-Gaussian states of photons and phonons. It covers the operational criteria for tolerant photons and their extension to quantum non-Gaussian photon coincidences. It also compares the sensing capability and robustness of high-quality phononic Fock states.
PROGRESS IN QUANTUM ELECTRONICS
(2022)
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
Quantum Science & Technology
L. S. Aguiar, L. F. M. Borelli, J. A. Roversi, A. Vidiella-Barranco
Summary: This study analyses the efficiency of a protocol with discrete modulation of continuous variable non-Gaussian states and calculates lower bounds of the asymptotic key rates against Gaussian collective attacks. The results show that the protocol with discrete modulation always outperforms the one with coherent states, increasing the maximum possible distance for secret key generation. Interestingly, it is found that the noisier the line, the better the performance of the protocol with discrete-modulated states, suggesting the advantage of continuous variable non-Gaussian states in non-ideal situations for quantum key distribution.
QUANTUM INFORMATION PROCESSING
(2022)
Article
Physics, Multidisciplinary
Dario De Santis, Donato Farina, Mohammad Mehboudi, Antonio Acin
Summary: We study the influence of the number of employed modes on the ability to witness non-Markovian evolutions in continuous-variable quantum dynamics. We find that the presence of multiple ancillary modes can cause correlation backflows in non-Markovian Gaussian evolutions, unlike the case with a single ancillary mode. This activation phenomenon occurs when three-mode states are employed, with only one mode undergoing the evolution, and is observed in both entanglement and steering correlations under two different Gaussian evolution models.
NEW JOURNAL OF PHYSICS
(2023)
Article
Physics, Multidisciplinary
U. Bhattacharya, Th Lamprou, A. S. Maxwell, A. Ordonez, E. Pisanty, J. Rivera-Dean, P. Stammer, M. F. Ciappina, M. Lewenstein, P. Tzallas
Summary: Strong laser field physics and quantum optics have been recently connected. Studies have shown that intense laser-matter interactions can generate controllable entangled and non-classical light states, opening up new research areas in these fields.
REPORTS ON PROGRESS IN PHYSICS
(2023)
Article
Physics, Multidisciplinary
Caterina Vigliar, Stefano Paesani, Yunhong Ding, Jeremy C. Adcock, Jianwei Wang, Sam Morley-Short, Davide Bacco, Leif K. Oxenlowe, Mark G. Thompson, John G. Rarity, Anthony Laing
Summary: Error-protection schemes can increase the success rate of quantum algorithms. General-purpose quantum computers can entangle noisy physical qubits to protect against errors. Measurement-based quantum computing architectures are the most viable approach for constructing an all-photonic quantum computer.
Article
Optics
Chenyang Zhu, Lin Wang, Di Zhao, Yuting Yang, Xiaofeng Liu, Beibei Xu, Zhousu Xu, Jianrong Qiu
Summary: By incorporating CsPbBr3 quantum dots into a glass host, non-resonant optical nonlinearity and multiphoton upconversion processes were measured for the first time, showing stable four-photon UC photoluminescence, low optical limiting thresholds, and high nonlinear optical absorption coefficients similar to colloid processed metal halide perovskite QDs. This monolithic inorganic glass with incorporated MHPQDs could provide a better platform for strong light-matter interaction for MHPs, with high robustness against air and moisture.
Article
Quantum Science & Technology
Nisreen Mohammed Mahdi, Arzu Kurt, Ferdi Altintas
Summary: We investigated the coherence and non-Markovianity of a quantum tunneling system with fluctuating barrier and modulated energy gap. By using the averaging method, we analytically derived the system dynamics and obtained the analytical expressions for coherence measure and non-Markovianity in a narrow range of parameter regimes for coherent and non-coherent initial states. Non-Markovian dynamics were observed in a high Kubo number scenario. We also found that there is no strong relation between the coherence of the system and non-Markovian dynamics, except for an intermediate noise color region for two initial states.
QUANTUM INFORMATION PROCESSING
(2023)
Article
Physics, Applied
Kevin Keomanee-Dizon, Matt Jones, Peter Luu, Scott E. Fraser, Thai V. Truong
Summary: ExD-SPIM is an improved light-sheet microscopy strategy that solves the limitation of capturing fluorescence signals in large volumes by extending the depth of field (DOF) of high-NA detection objectives to match the thickness of the illumination light sheet. Compared to conventional light sheet imaging, ExD-SPIM improves the signal-to-noise ratio and reduces the rate of photobleaching. In whole-brain activity imaging, ExD-SPIM enhances signal sensitivity and volumetric coverage.
APPLIED PHYSICS LETTERS
(2022)
Article
Physics, Multidisciplinary
G. D. de Moraes Neto, V Montenegro
Summary: This study proposes an on-demand scheme to engineer non-Gaussian bipartite entanglement in the nonlinear regime by utilizing cavity dissipation. The proposed scheme achieves a high degree of steady-state entanglement and demonstrates robustness in the field of optomechanics.
Article
Optics
Sitotaw Eshete
Summary: This paper investigates the robustness of quantum correlations in an optomechanical quantum source, analyzing the effects of thermal mean photon number, squeezing parameter, and optomechanical cooperativity on Gaussian quantum discord and entanglement, and demonstrates that Gaussian quantum discord captures more non-classical properties compared to entanglement.
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
Chemistry, Multidisciplinary
Randall B. Shirts, John S. Welch
Summary: This study examines the time-dependent numerical solutions of the Schrodinger equation in quantum systems perturbed by a sinusoidal field and illuminates the role of interstate phase differences in multiphoton absorption. Population inversion does not occur in the presence of non-zero detuning due to the drift of the exciting field.
Article
Materials Science, Multidisciplinary
Yinxuan Cai, Teng Zhao, Siming Zhu, Youke Xu, Cunjin Liu, Liyun Hu
Summary: We investigate the properties of non-Gaussian quantum states generated by a three-photon quantum scissor (3-QS). Three different types of inputs to the 3-QS are considered: coherent state (CS), squeezed vacuum state (SVS), and optical field thermal state (TS). We discuss the detection probability and fidelity of the output states, calculate the Wigner functions, and analyze the non-classical properties. The results demonstrate the potential applications of the 3-QS in quantum information technology.
RESULTS IN PHYSICS
(2023)
Review
Physics, Fluids & Plasmas
M. D. Forlevesi, R. Egydio de Carvalho, Emanuel F. de Lima
Summary: This article investigates the nonlinear dynamics of a diatomic polar molecule under a linearly polarized laser field. The molecule's dipole is coupled with a time-dependent electric field, resulting in a bound energy region and a free-energy region. The system has two and a half degrees of freedom due to the nonalignment between the dipole axis and the laser direction, as well as the time dependence of the external field. Instead of using the Poincare surface-of-section technique, the Lagrangian descriptor associated with escape times is proposed to analyze the system dynamics.
Article
Physics, Multidisciplinary
Josef Hlousek, Miroslav Jezek, Jaromir Fiurasek
Summary: This paper proposes and experimentally demonstrates a method for directly certifying the non-Gaussianity and Wigner function negativity of photonic quantum detectors, using only two classical thermal states and a vacuum state for probing. The results show the feasibility of benchmarking photonic quantum detectors with a few measurements on classical states.
PHYSICAL REVIEW LETTERS
(2021)
Article
Optics
Martin Bielak, Robert Starek, Vojtech Krcmarsky, Michal Micuda, Miroslav Jezek
Summary: Liquid crystal devices are essential in optical metrology, optical communications, polarization-sensitive imaging, and photonic information processing, and can achieve fast preparation and detection of polarization states with unprecedented accuracy.
Article
Physics, Multidisciplinary
Lukas Lachman, Radim Filip
Summary: Photon coincidences play a crucial role in quantum technologies by revealing nonlinear quantum processes in matter and certifying a new quality of photon sources. The criteria for quantum non-Gaussian two-photon coincidences reject states emerging from Gaussian parametric processes, which often limit applications in quantum technologies. Additionally, the robustness of quantum non-Gaussian coincidences is analyzed and compared to the heralded quantum non-Gaussianity of single photons.
PHYSICAL REVIEW LETTERS
(2021)
Review
Engineering, Electrical & Electronic
Lukas Lachman, Radim Filip
Summary: This review introduces the theoretical analyses and applications of quantum non-Gaussian states of photons and phonons. It covers the operational criteria for tolerant photons and their extension to quantum non-Gaussian photon coincidences. It also compares the sensing capability and robustness of high-quality phononic Fock states.
PROGRESS IN QUANTUM ELECTRONICS
(2022)
Article
Physics, Applied
Dominik Vasinka, Martin Bielak, Michal Neset, Miroslav Jezek
Summary: This study presents direct and inverse models for liquid crystal polarization transformation based on deep neural networks, radial basis functions, and linear interpolation. Using deep learning significantly improves accuracy, with decreasing errors as training data increases. The research has important implications for improving the control accuracy of liquid crystals in various fields.
PHYSICAL REVIEW APPLIED
(2022)
Article
Optics
Jan Grygar, Josef Hlousek, Jaromir Fiurasek, Miroslav Jezek
Summary: We experimentally certify the quantum non-Gaussian character of a photon number-resolving detector, demonstrating the adaptability of existing criteria for quantum non-Gaussianity to quantum measurements. We confirm the non-Gaussianity of a detector consisting of ten single-photon avalanche photodiodes and propose strategies such as injecting Gaussian background noise and using a third thermal state to expedite the certification process.
Article
Quantum Science & Technology
Jaromir Mika, Lukas Lachman, Tomas Lamich, Radim Filip, Lukas Slodicka
Summary: The distributed quantum information processing and hybridization of quantum platforms require high-quality light-matter interaction and efficient quantum interfaces. This study demonstrates the generation of light with provably quantum non-Gaussian (QNG) features from a warm atomic ensemble, achieved through fast resonant excitation, large spectral bandwidth, and low absorption loss.
NPJ QUANTUM INFORMATION
(2022)
Article
Physics, Applied
Josef Hlousek, Ivo Straka, Miroslav Jezek
Summary: The linearity of single-photon detectors allows accurate optical measurements at low light levels and using non-classical light. However, the response of single-photon detectors can exhibit intriguing nonlinear effects that may influence the performed measurements.
APPLIED PHYSICS REVIEWS
(2023)
Article
Physics, Multidisciplinary
Luca Innocenti, Lukas Lachman, Radim Filip
Summary: The article presents operational criteria for detecting nonclassicality of quantum states. These criteria can be implemented in experiments with different systems such as light, atoms, solid-state systems, and mechanical oscillators.
PHYSICAL REVIEW LETTERS
(2023)
Article
Optics
Radim Hosak, Ivo Straka, Ana Predojevic, Radim Filip, Miroslav Jezek
Summary: The study proposes a workflow for evaluating the quality of entanglement sources, estimating the potential performance of quantum entanglement sources in quantum key distribution protocols based on quantum state density matrices from theoretical models and experimental data. It highlights the trade-off between the generation rate and quality of entangled pairs due to the multiphoton nature of the generated quantum states. The research finds that the secure key rate of down-converted photon pairs is limited by intrinsic multiphoton contributions, and identifies an optimum gain for continuous-wave down-conversion sources.
Article
Optics
Ivo Straka, Miroslav Jezek
Summary: The proposed method allows for arbitrarily shaping and scaling the temporal intensity correlations of an optical signal locally, without periodic correlations. Experimental demonstration using stochastic intensity modulation was conducted, along with analysis and simulation of shaping both temporal correlations and photon statistics specified by the user. The study shows that temporal correlations, within the constraints of monotony and convexity, are independent of photon statistics and can take on any shape.
