Article
Optics
G. Bacciagaluppi, R. Hermens
Summary: The Bell inequalities can be violated by postselecting on the results of a measurement of the Bell states, but the violation can be reproduced classically by postselecting based on information about the original state preparation. A proposed variant of existing experiments aims to rule out alternative explanations by conducting preparation and postselection at spacelike separation, leading to the conclusion that quantum state evolution is not a fundamental process and event-based Heisenbergian picture should be adopted.
Article
Optics
D. Babukhin
Summary: The Harrow-Hassidim-Lloyd algorithm (HHL) can solve a system of linear equations exponentially faster, but it requires postselection of an ancilla qubit for obtaining the solution, making it probabilistic. In this paper, we demonstrate conditions under which the HHL algorithm can work without postselection of the ancilla qubit. We derive the expectation values for an observable M on the HHL outcome state when the ancilla qubit is measured in |0) and |1), and provide an explicit example satisfying the postselection-free HHL condition using a practically interesting input matrix and observable. Our work can enhance the performance of HHL-based algorithms.
Article
Physics, Applied
Suman Karan, Radhika Prasad, Anand K. Jha
Summary: In this paper, a technique for postselection-free generation of high-dimensional OAM entangled states is proposed and experimentally demonstrated. The generation accuracy is reported to be above 98% for states with Gaussian and triangular OAM Schmidt spectra, and up to 90% for maximally entangled OAM states with rectangular spectra.
PHYSICAL REVIEW APPLIED
(2023)
Article
Quantum Science & Technology
Ying-Qi Wang, Yu Wang, Xinyu Zhao, Jie Song, Yan Xia
Summary: The paper proposes a rapid and high-fidelity protocol for generating Bell states using dissipation dynamics and Lyapunov control, which accelerates the evolution by designing dissipative paths and utilizing control pulses, and demonstrates robustness against possible noises.
QUANTUM INFORMATION PROCESSING
(2021)
Article
Physics, Multidisciplinary
Jun-Hao Wei, Xin-Yu Xu, Shu-Ming Hu, Qing Zhou, Li Li, Nai-Le Liu, Kai Chen
Summary: Measurement-device-independent quantum key distribution (MDI-QKD) is a method that enables two legitimate users to generate shared information-theoretic secure keys with immunity to all detector side attacks. However, the original proposal using polarization encoding is sensitive to polarization rotations from birefringence and misalignment. To overcome this problem, we propose a robust QKD protocol based on decoherence-free subspaces using polarization-entangled photon pairs. We design a logical Bell state analyzer for such encoding.
Article
Physics, Multidisciplinary
Xiao-Min Hu, Chao Zhang, Bi-Heng Liu, Yu Guo, Wen-Bo Xing, Cen-Xiao Huang, Yun-Feng Huang, Chuan-Feng Li, Guang-Can Guo
Summary: Violation of Bell's inequalities demonstrates a strong conflict between quantum mechanics and local realism. Loophole-free Bell tests not only enhance understanding of quantum mechanics, but also serve as important foundations for device-independent tasks in quantum information. High-dimensional quantum systems have significant advantages over qubits in closing the detection loophole.
PHYSICAL REVIEW LETTERS
(2022)
Article
Engineering, Civil
Subhan Ahmad, Pradeep Bhargava, Ajay Chourasia, Minkwan Ju
Summary: This study tested reinforced concrete beams without transverse reinforcement exposed to high temperatures, finding significant effects of exposure temperature and tension reinforcement ratio on shear strength loss, while the shear-span-to-depth ratio had a minor influence on shear strength loss. An increase in exposure temperature resulted in decreased stiffness and increased deflection of the beams.
ENGINEERING STRUCTURES
(2021)
Article
Chemistry, Physical
Weinan Zhou, Kaoru Yamamoto, Asuka Miura, Ryo Iguchi, Yoshio Miura, Ken-ichi Uchida, Yuya Sakuraba
Summary: This study utilizes the Seebeck effect to drive transverse thermoelectric generation, which shows great potential for energy harvesting and heat sensing applications, especially with the orthogonal geometry in the heat-to-charge current conversion. By hybridizing Seebeck effect and anomalous Hall effect in a closed circuit comprising thermoelectric and magnetic materials, a similar symmetry to the anomalous Nernst effect can be achieved in transverse thermoelectric generation. The Seebeck-effect-driven transverse thermopower is found to be several orders of magnitude larger than the anomalous-Nernst-effect-driven thermopower, indicating a promising unconventional approach for developing applications of transverse thermoelectric generation.
Article
Mathematics
Manjun Yan, Long Ma
Summary: In this study, the efficient generation of higher-order Hermite-Gaussian modes via cascaded spatial light modulators was experimentally investigated. The conversion efficiency for the HG90 mode reached 61%. This high-efficiency generation method has promising application potentials in the fields of biophotonics, laser physics, and quantum information.
Article
Optics
Ningning Wang, Shan Liu, Ruwei Zhao, Tianxiang Xu, Feng Chen, Ady Arie, Wieslaw Krolikowski, Yan Sheng
Summary: This study investigates the effect of local duty cycle of nonlinearity on light intensity distribution in transverse second-harmonic generation, providing a fundamental way to achieve high-quality transverse second-harmonic generation.
Article
Optics
Zilong Zhang, Yuan Gao, Xiangjia Li, Xin Wang, Suyi Zhao, Qiang Liu, Changming Zhao
Summary: Nonlinear frequency conversion of structured beams, specifically the intracavity second harmonic generation (SHG), has been investigated theoretically and experimentally. The results show that the SHG of transverse mode locking (TML) beams can carry more information compared to coherent and incoherent superposed states. Various rarely observed SHG beam patterns have been obtained, showcasing the potential applications in optical 3D printing, optical trapping of particles, and free-space optical communication.
ADVANCED PHOTONICS
(2022)
Article
Optics
Quan Sheng, Aihua Wang, Yuanyuan Ma, Sijia Wang, Meng Wang, Zheng Shi, Junjie Liu, Shijie Fu, Wei Shi, Jianquan Yao, Takashige Omatsu
Summary: This study investigates the generation of single-transverse-mode Laguerre-Gaussian (LG) emission from a diode-end-pumped Nd:YVO4, 1064 nm laser using mode selection via intracavity spherical aberration (SA). The study found that by choosing the appropriate focal length of the intracavity lens, it was possible to generate single-mode LG(0,+/- m) laser output with selectable angular indices m from 1 to 95 and non-zero radial indices p up to 4.
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
Engineering, Mechanical
Yuanxie Shen, Linfeng Wu, Shixue Liang
Summary: In this paper, an accurate prediction model is established to identify the failure mode of flat slabs. XGBoost is selected as the best model, and its prediction results are explained using SHAP.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Engineering, Mechanical
Yongxue Li, Feng Xiong, Lingzhi Xie, Lizhi Sun
Summary: This paper presents a novel state-space approach to improve the calculation accuracy and efficiency of double-beam systems. Numerical examples demonstrate that the proposed method is accurate and fast, making it suitable for large-scale modeling and simulation of various engineering structures.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Optics
S. R. Samoylenko, A. V. Lisitsin, D. Schepanovich, I. B. Bobrov, S. S. Straupe, S. P. Kulik
LASER PHYSICS LETTERS
(2020)
Article
Physics, Multidisciplinary
M. Yu Saygin, I. Kondratyev, I. Dyakonov, S. A. Mironov, S. S. Straupe, S. P. Kulik
PHYSICAL REVIEW LETTERS
(2020)
Article
Quantum Science & Technology
Adriano Macarone Palmieri, Egor Kovlakov, Federico Bianchi, Dmitry Yudin, Stanislav Straupe, Jacob D. Biamonte, Sergei Kulik
NPJ QUANTUM INFORMATION
(2020)
Article
Physics, Multidisciplinary
K. A. Balygin, I. B. Bobrov, A. N. Klimov, S. N. Molotkov, M. I. Ryzhkin
JOURNAL OF EXPERIMENTAL AND THEORETICAL PHYSICS
(2020)
Article
Optics
A. D. Moiseevskiy, G. Struchalin, S. S. Straupe, S. P. Kulik
LASER PHYSICS LETTERS
(2020)
Article
Physics, Applied
O. V. Borzenkova, G. I. Struchalin, A. S. Kardashin, V. V. Krasnikov, N. N. Skryabin, S. S. Straupe, S. P. Kulik, J. D. Biamonte
Summary: This study explores the impact of noise on quantum phase transitions in the Schwinger model within a variational framework, finding that despite noise, variational quantum algorithms can detect the phase transition of the Schwinger Hamiltonian.
APPLIED PHYSICS LETTERS
(2021)
Article
Physics, Multidisciplinary
Yong Siah Teo, Seongwook Shin, Hyunseok Jeong, Yosep Kim, Yoon-Ho Kim, Gleb Struchalin, Egor Kovlakov, Stanislav S. Straupe, Sergei P. Kulik, Gerd Leuchs, Luis L. Sanchez-Soto
Summary: In this study, convolutional neural networks are trained to predict the completeness of information in quantum measurements, accelerating the characterization of quantum states. Experimental results show that trained networks can significantly reduce certification time and improve the computation yield of large-scale quantum processors.
NEW JOURNAL OF PHYSICS
(2021)
Article
Optics
L. Gerasimov, R. R. Yusupov, I. B. Bobrov, D. Shchepanovich, E. Kovlakov, S. S. Straupe, S. P. Kulik, D. Kupriyanov
Summary: In this study, we theoretically investigate the coherent dynamics of a spin qubit encoded in hyperfine sublevels of an alkali-metal atom in a far off-resonant optical dipole trap. We focus on various dephasing processes and their effects on the qubit dynamics. Our fully quantum treatment of the atomic motion remains valid in the limit of close-to-ground-state cooling with a low number of vibrational excitations, supported by reasonable correspondence with an experiment without fitting parameters.
Article
Quantum Science & Technology
G. Struchalin, Ya A. Zagorovskii, E. Kovlakov, S. S. Straupe, S. P. Kulik
Summary: This study demonstrates the performance of property estimation based on classical shadows in a high-dimensional spatial photon state experiment. Experimental data shows that this method can outperform traditional full state reconstruction methods.
Proceedings Paper
Quantum Science & Technology
I. Kondratyev, I. Dyakonov, M. Yu Saygin, S. S. Straupe, S. P. Kulik
FIFTH INTERNATIONAL CONFERENCE ON QUANTUM TECHNOLOGIES (ICQT-2019)
(2020)
Proceedings Paper
Quantum Science & Technology
N. N. Skryabin, S. A. Zhuravitskii, I. V. Dyakonov, M. Yu. Saygin, S. S. Straupe, S. P. Kulik
FIFTH INTERNATIONAL CONFERENCE ON QUANTUM TECHNOLOGIES (ICQT-2019)
(2020)
Article
Optics
F. V. Gubarev, I. V. Dyakonov, M. Yu. Saygin, G. I. Struchalin, S. S. Straupe, S. P. Kulik
Article
Optics
Y. S. Teo, G. Struchalin, E. Kovlakov, D. Ahn, H. Jeong, S. S. Straupe, S. P. Kulik, G. Leuchs, L. L. Sanchez-Soto
Article
Optics
C. Okoth, E. Kovlakov, F. Boensel, A. Cavanna, S. Straupe, S. P. Kulik, M. Chekhova
