Article
Physics, Multidisciplinary
Tomas Opatrny, Avijit Misra, Gershon Kurizki
Summary: The concept of extracting work from thermal noise through phase-sensitive measurements and unitary manipulations is proposed, showing improved efficiency and power with greater average quantum input. This protocol proves to be advantageous compared to traditional models of information and heat engines.
PHYSICAL REVIEW LETTERS
(2021)
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
Optics
Bo Lan, Hong-chun Yuan, Xue-xiang Xu
Summary: We studied the effect of delocalized single-photon addition on different input modes, generating entangled light states with more parameters and complex structures, characterized by increased Wigner negativity and even discorrelation.
Article
Green & Sustainable Science & Technology
Jose Luis Duomarco
Summary: The paper aims to develop an algorithm to determine the maximum work that can be extracted from solar global horizontal irradiance. Through theoretical analysis and experimental data from five cities in Uruguay, it is concluded that the exergy factor is a weak logarithmic function of GHI with weak geo-reference-dependence.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Energy & Fuels
Xinlei Wang, Haonan Sha, Mulin Li, Tianze Liu, Mingyang Sun, Tong Liu, Haonan Huang, Jiadian Wang, Dongyue Jiang
Summary: This paper reveals the fundamental principles and working conversion process of the thermal engine in underwater gliders by establishing a numerical model. The study finds that the outer wall temperature and the diameter of the thermal engine significantly affect its performance, and the velocity distribution in the liquid PCM also affects the melting process and engine performance.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Physics, Multidisciplinary
Isaac H. Kim, Bowen Shi, Kohtaro Kato, Victor V. Albert
Summary: (English Summary:)
We study a (2 + 1)-dimensional gapped quantum many-body system that may have a topologically protected energy current at its edge. The magnitude of this current is determined by the temperature and the chiral central charge, which is associated with the effective field theory of the edge. We derive a formula for the chiral central charge that is determined solely by the many-body ground state wave function in the bulk, similar to the topological entanglement entropy. According to our formula, a nonzero chiral central charge creates a topological obstruction that prevents the ground state wave function from being real-valued in any local product basis.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Fluids & Plasmas
F. H. Kamin, S. Salimi, Alan C. Santos
Summary: The work extraction protocol is a significant issue in quantum batteries, with the potential loss of energy quantified through exergy when extracting ergotropy from a quantum system. Research shows that maintaining the quantum correlations of a system can facilitate energy extraction processes and opens possibilities for exploring exergy stored as quantum correlations in open system quantum batteries.
Article
Physics, Multidisciplinary
David W. Lyons, Cristina Mullican, Adam Rilatt, Jack D. Putnam
Summary: We present two results on multiqubit Werner states, which are states that remain unchanged under the action of a single-qubit unitary on all the qubits. To characterize the entanglement properties of these states, we construct a basis for the space of Werner invariant Hermitian operators on the Hilbert space of pure states. We also study a family of multiqubit states that generalize the singlet and show that their 2-qubit reduced density matrices are separable.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2023)
Article
Physics, Fluids & Plasmas
Lucas P. Kamizaki, Marcus V. S. Bonanca, Sergio R. Muniz
Summary: In this study, we perform numerical analysis on the performance of optimal linear-response processes far from equilibrium and assess the accuracy of perturbative methods in calculating the irreversible work.
Article
Geosciences, Multidisciplinary
Yi Zhao, XinGang Niu
Summary: This article studies the experiment of broken coal ejection under different conditions from the perspective of energy dissipation. The results show that CO2 gas has a stronger ability to work on the outburst and the crushing degree of coal plays an important role in the expansion and release of gas internal energy.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Agronomy
Sang-yeon Lee, In-bok Lee, Seung-no Lee, Uk-hyeon Yeo, Jun-gyu Kim, Rack-woo Kim, Cristina Decano-Valentin
Summary: This study focused on utilizing thermal effluent for agricultural facilities, specifically greenhouses, by designing an energy model and conducting field experiments to validate and estimate energy loads for greenhouse growing Irwin mangoes. The energy efficiency of the thermal effluent heat pump system was analyzed and compared with traditional energy sources, showing a significant cost reduction of 68.21% when using the thermal effluent-heat pump system compared to a kerosene boiler.
Article
Thermodynamics
Artur Szajding, Marta Kuta, Agnieszka Cebo-Rudnicka, Marcin Rywotycki
Summary: This paper proposes connecting a thermal energy storage (TES) with a phase change material (PCM) to a photo-voltaic (PV) installation in order to store excess energy. The TES with PCM was designed using an electric heater for charging and water for discharge. Numerical simulations confirmed the effectiveness of the designed TES, which utilized thin aluminium fins for fast heat transport and short charging time. The study also included measurements of energy produced by a 9.6 kWp PV installation in Southern Poland and economic analysis, which showed the feasibility of using a PV installation to charge a TES with PCM.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2023)
Article
Physics, Multidisciplinary
J. L. Lopez-Picon, O. Obregon, J. Rios-Padilla
Summary: This paper formulates the generalized theory of fluctuations corresponding to probability-dependent generalized entropies in the canonical and grand canonical ensembles. These entropies, derived within the superstatistics approach, depend only on probability and have non-extensive effects on thermodynamic functions. The differences between standard and generalized fluctuations are computed using the thermodynamics of Mie fluids, and it is shown that generalized fluctuations depend on range. The work fluctuation theorem corresponding to these entropies is also established, and small deviations in the decaying behavior of the average of the ratio of work probabilities are observed, with the expressions for the generalized work theorem consistently converging to zero.
EUROPEAN PHYSICAL JOURNAL PLUS
(2022)
Article
Physics, Multidisciplinary
R. A. Abdelghany, A. -B. A. Mohamed, M. Tammam, A. -S. F. Obada
Summary: The nonclassical correlations in the two-qubit Ising model under different magnetic field directions were investigated, revealing relationships between LQFI and LQU. The dependence of nonclassical correlations on the magnetic field direction, magnitude, and spin interaction coupling was explored, as well as the sudden changes in LQFI and LQU related to entanglement based on temperature and magnetic field magnitude.
EUROPEAN PHYSICAL JOURNAL PLUS
(2021)
Article
Optics
Kohdai Kuroiwa, Hayata Yamasaki
Summary: Quantum resource theories offer a unified framework for quantitatively analyzing inherent quantum properties as resources for quantum information processing. This paper introduces an alternative resource measurement axiom, asymptotic consistency, which allows for quantifying resources without contradicting transformation rates. Relative entropic measures are shown to be consistent with transformation rates for various types of resources, demonstrating widely applicable quantitative analysis of quantum properties.
Article
Optics
Vojtech Svarc, Josef Hlousek, Martina Novakova, Jaromir Fiurasek, Miroslav Jezek
Article
Engineering, Electrical & Electronic
Ivo Straka, Jan Grygar, Josef Hlousek, Miroslav Jezek
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2020)
Article
Physics, Multidisciplinary
Robert Starek, Michal Micuda, Ivo Straka, Martina Novakov, Miloslav Dusek, Miroslav Jezek, Jaromir Fiurasek, Radim Filip
NEW JOURNAL OF PHYSICS
(2020)
Article
Optics
Robert Starek, Michal Micuda, Radim Hosak, Miroslav Jezek, Jaromir Fiurasek
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
Instruments & Instrumentation
Glib Mazin, Ales Stejskal, Michal Dudka, Miroslav Jezek
Summary: The non-blocking high-resolution digital delay line based on asynchronous circuit design allows for an efficient trade-off between resolution and delay range, with minimized dead time operation. Experimental characterization revealed linear dependence of delay on temperature, increasing timing jitter over the delay dynamic range, and the use of pulse shrinking circuits to reduce pulse spreading effect. This delay line is suitable for applications requiring dead time minimization and acceptable excess jitter in advanced photonic networks.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2021)
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
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
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.