Article
Physics, Multidisciplinary
Matteo Fadel, Ayaka Usui, Marcus Huber, Nicolai Friis, Giuseppe Vitagliano
Summary: This method offers a practical way to measure entanglement in experiments, especially in situations with limited observable measurements, such as quantifying entanglement using measurements of the first and second moments of the collective spin operator.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Xiang Chen, Jin-Hua Zhang, Fu-Lin Zhang
Summary: This study focuses on the transmission and recovery of quantum states, proposing a scheme for nondestructive probabilistic teleportation using an ancilla to recover initial quantum information in case of transmission failure. Ancilla functions as a quantum apparatus to measure the sender's subsystem, with erasing its recorded information able to resume the initial state.
Article
Optics
Isaac Nape, Bereneice Sephton, Pedro Ornelas, Chane Moodley, Andrew Forbes
Summary: Structured light has emerged as a hot topic, offering new states of light, enhanced functionality, and a modern toolbox for fundamental science. By structuring light as single photons and entangled states, high dimensional quantum states can be encoded using spatial modes, enabling tests of quantum mechanics and improved information processing. This tutorial outlines the basics of high dimensional quantum states expressed in spatial modes and explains how to create, control, and detect such states, focusing on transverse spatial modes like orbital angular momentum and pixel modes. Examples of applications, from communications to imaging, are also highlighted.
Article
Chemistry, Physical
Laura Bancroft, Yunfan Qiu, Matthew D. Krzyaniak, Michael R. Wasielewski
Summary: The study demonstrated photodriven quantum teleportation of an electron spin state in a covalent donor-acceptor-radical system. Varying the time between spin state preparation and photoinitiated teleportation had effects on the results, with oscillatory behavior observed. Understanding experimental parameters is crucial for leveraging this phenomenon for quantum information applications.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Multidisciplinary Sciences
Matthias J. J. Bayerbach, Simone E. E. D'Aurelio, Peter van Loock, Stefanie Barz
Summary: Bell-state projections are fundamental for most quantum communication and computing protocols, but current measurement schemes can only identify two out of four Bell states with a maximum success probability of 50%. In this study, we experimentally demonstrate a scheme that increases the success probability to 62.5% by using additional ancillary photons. The experimental results show a substantial improvement with a success probability of (57.9 ± 1.4)%. This work has the potential to lead to more efficient implementations of quantum technologies based on Bell-state measurements by extending the protocol to include a larger number of ancillary photons.
Article
Physics, Multidisciplinary
Jacob L. Beckey, N. Gigena, Patrick J. Coles, M. Cerezo
Summary: In this work, a family of multipartite entanglement measures called concentratable entanglements is introduced, providing a general framework for quantifying multipartite entanglement. These measures do not increase, on average, under local operations and classical communications, and have an operational meaning in terms of probabilistic concentration of entanglement into Bell pairs. Furthermore, these measures can be efficiently estimated on a quantum computer through a parallelized SWAP test, paving the way for measuring multipartite entanglement on quantum devices.
PHYSICAL REVIEW LETTERS
(2021)
Article
Optics
Gui-long Jiang, Wen-qiang Liu, Hai-rui Wei
Summary: In this study, we propose a novel entanglement concentration protocol based on simple linear optics, which can be used to concentrate less-entangled states with unknown parameters. Our protocol avoids the need for post-selection principles or photon-number-resolving detectors. By recycling the output photons, the success probability can be increased, and the experimental investigation can be easily conducted using basic linear optical elements.
Article
Quantum Science & Technology
Tomoki Yamagami, Etsuo Segawa, Norio Konno
Summary: The study extends the scheme of quantum teleportation by quantum walks and introduces the mathematical definition and necessary conditions for achieving quantum teleportation rigorously. The results classify the parameters necessary for the successful accomplishment of quantum teleportation.
QUANTUM INFORMATION PROCESSING
(2021)
Article
Optics
Sofiane Merkouche, Valerian Thiel, Brian J. Smith
Summary: The article discusses the probabilistic splitting and combining of photons in spontaneous parametric down conversion and sum-frequency generation processes, as well as the impact of single-photon projective measurement on the input state in a two-photon SFG process. Using positive operator-valued measure, it is shown the correlation between two-photon states and the states produced by the PDC process.
Article
Nanoscience & Nanotechnology
Baptiste Jadot, Pierre-Andre Mortemousque, Emmanuel Chanrion, Vivien Thiney, Arne Ludwig, Andreas D. Wieck, Matias Urdampilleta, Christopher Bauerle, Tristan Meunier
Summary: The use of surface acoustic waves to displace two entangled spins while maintaining entanglement over a distance of 6 micrometers provides a pathway for fast on-chip deterministic interconnection of remote quantum bits in semiconductor quantum circuits. This work showcases the potential for long-distance entanglement of spin qubits in semiconductors to enable connectivity of quantum core units for networked quantum computing.
NATURE NANOTECHNOLOGY
(2021)
Article
Physics, Applied
Si-Yu Xiong, Liang Tang, Qun Zhang, Dan Xue, Ming-Qiang Bai, Zhi-Wen Mo
Summary: In this paper, we discuss short-distance teleportation and propose bidirectional, rotation, and cyclic rotation teleportation schemes. These schemes have certain advantages in saving quantum resources.
MODERN PHYSICS LETTERS B
(2022)
Article
Multidisciplinary Sciences
Bohan Li, Aritra Das, Spyros Tserkis, Prineha Narang, Ping Koy Lam, Syed M. Assad
Summary: The maximum entanglement achievable through passive transformations by continuous-variable states is called the entanglement potential. Recent research indicates that the entanglement potential can be upper-bounded by a simple function of squeezing of formation. Certain classes of two-mode Gaussian states can saturate this bound, but it remains an open problem for the general case. In this study, a larger class of states is introduced that is proven to saturate the bound, and it is conjectured that all two-mode Gaussian states can be passively transformed into this class, thereby equating entanglement potential with squeezing of formation. An explicit algorithm for the passive transformations is provided, and extensive numerical testing is performed to support this claim, aiming to unify the resource theories of two characteristic quantum properties of continuous-variable systems.
SCIENTIFIC REPORTS
(2023)
Article
Multidisciplinary Sciences
Mingjian He, Robert Malaney
Summary: In this study, a new CV-based teleportation protocol is explored to improve the transfer of hybrid entangled states. The modified protocol shows significant improvement over traditional CV teleportation for both DV qubits and CV qubits. Additionally, the use of non-Gaussian operations with quantum scissors provides the most improvement in loss tolerance.
SCIENTIFIC REPORTS
(2022)
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
Physics, Multidisciplinary
Ali Mahjoory, Payman Kazemikhah, Hossein Aghababa, Mohammadreza Kolahdouz
Summary: This paper proposes an asymmetric tridirectional quantum teleportation (TQT) protocol that uses a seven-qubit cluster states as the quantum channels of each party. In this scheme, any one of the three participants can send their arbitrarily entangled states to the other two concurrently. The tridirectional functionality shows that all three users can act as sender and receiver simultaneously. The proposed scheme and circuit were simulated and validated using IBM quantum experience platform, QASM_simulator and Qiskit library.
Article
Physics, Multidisciplinary
Yi Li, Shuang-Yin Huang, Min Wang, Chenghou Tu, Xi-Lin Wang, Yongnan Li, Hui-Tian Wang
Summary: High-dimensional (HD) entanglement allows for more bits encoding than in the two-dimensional case and has the potential to improve communication capacity and robustness to noise in quantum channels. However, quantifying HD entanglement explicitly is a challenge. We present a scan-free tomography method that requires only two measurements to characterize two-photon HD entanglement. We experimentally reconstruct the density matrices of OAM entangled states with high fidelity and generalize the method to mixed HD entanglement.
PHYSICAL REVIEW LETTERS
(2023)
Article
Optics
Zi-Mo Cheng, Shu-Tian Xue, Yan-Chao Lou, Pei Wan, Zhi-Cheng Ren, Jianping Ding, Xi-Lin Wang, Hui-Tian Wang
Summary: Rotational Doppler effect is a phenomenon that occurs when light passes through a rotating object and its angular momentum changes. It has been studied extensively in linear optics, but its application in nonlinear optics remains to be explored.
Article
Optics
Xinglin Wang, Wenxiang Yan, Yuan Gao, Zheng Yuan, Zhi-Cheng Ren, Xi-Lin Wang, Jianping Ding, Hui-Tian Wang
Summary: Structured optical fields containing polarization singularities have attracted much attention for their ability to maintain topological invariance during propagation. Progress has been made in mathematical description, generation and detection technologies, propagation dynamics, and applications. Manipulating polarization singularities with multiple degrees of freedom, especially in three-dimensional tailored optical fields, remains a crucial and difficult task. This study presents and demonstrates longitudinal polarization singularities obtained by superimposing Bessel-like modes with orthogonal polarization states on composite vector optical fields. The embedded singularities can be manipulated to propagate along arbitrary trajectories and undergo various transformations in 3D space, allowing flexible customization of their topological morphology and intensity patterns. The findings have implications for research in singular optics and applications such as micromanipulation, microstructure fabrication, and optical encryption.
PHOTONICS RESEARCH
(2023)
Article
Pediatrics
Xinran Chu, Maoxiang Qian, Jin Yang, Dong Wu, Jing Gao, Lu Cao, Fang Fang, Jian Pan, Hui Zhang, Shaoyan Hu
Summary: The study aimed to evaluate the influence of GATA3 rs3824662 on pre-B-cell ALL susceptibility and long-term prognosis in Han Chinese children. The results showed that GATA3 rs3824662 was associated with susceptibility to pre-B-cell ALL and could be a risk factor for poor treatment response and treatment-related sepsis.
FRONTIERS IN PEDIATRICS
(2023)
Article
Nutrition & Dietetics
Mei Yan, Jian Pan, Jie Huang, Changwei Liu, Xiaona Xia, Ting Zhu, Yuanyuan Wan, Yongjun Fang, Weibing Tang
Summary: This study evaluated the nutritional status of children who underwent allogeneic hematopoietic stem cell transplantation (alloHSCT) in the first 100 days. The study aimed to clarify the effect of weight loss on clinical outcomes and to analyze factors influencing weight loss. Data from 80 pediatric patients were collected and analyzed to investigate the factors affecting weight loss and the impact of weight loss on clinical outcomes.
FRONTIERS IN NUTRITION
(2023)
Article
Optics
Jingyuan Rao, Xian Long, Yuan Gao, Wenxiang Yan, Zheng Yuan, Hanchao Sun, Zhi-cheng Ren, Jianping Ding, Hui-tian Wang
Summary: In this paper, a new technique for achieving four-dimensional focal field modulation is proposed by combining a DMD and a vector field synthesis system based on a 4-f system. The high-speed modulation ability of DMDs enables versatile focus patterns to be fast switchable during the exposure time of the detector, forming multiple patterns in a single recording frame. Our proposed method is effective at improving the flexibility and speed of the focal field modulation, which is beneficial to applications.
Article
Optics
Wei Li, Likang Zhang, Hao Tan, Yichen Lu, Sheng-Kai Liao, Jia Huang, Hao Li, Zhen Wang, Hao-Kun Mao, Bingze Yan, Qiong Li, Yang Liu, Qiang Zhang, Cheng-Zhi Peng, Lixing You, Feihu Xu, Jian-Wei Pan
Summary: This article reports a QKD system that can generate keys at a record high rate of 115.8 Mb/s over a 10 km standard optical fiber and distribute keys over up to 328 km of ultralow-loss fiber. These abilities are attributed to a multipixel superconducting nanowire single-photon detector with an ultrahigh counting rate, an integrated transmitter that can stably encode polarization states with low error, a fast post-processing algorithm for generating keys in real time, and the high system clock rate operation. The results demonstrate the feasibility of practical high-rate QKD with photonic techniques, thus opening its possibility for widespread applications.
Article
Physics, Multidisciplinary
Wei Li, Likang Zhang, Yichen Lu, Zheng-Ping Li, Cong Jiang, Yang Liu, Jia Huang, Hao Li, Zhen Wang, Xiang-Bin Wang, Qiang Zhang, Lixing You, Feihu Xu, Jian-Wei Pan
Summary: We propose and demonstrate a new method to achieve twin-field quantum key distribution (TF-QKD) without the need for phase locking. By separating the communication time into reference frames and quantum frames, we establish a global phase reference using the reference frames and reconcile the phase reference efficiently using a tailored algorithm based on fast Fourier transform. We successfully demonstrate no-phase-locking TF-QKD from short to long distances over standard optical fibers, achieving high secret key rates and repeaterlike key rates. Our work provides a scalable and practical solution to TF-QKD, representing an important step towards its wide applications.
PHYSICAL REVIEW LETTERS
(2023)
Article
Physics, Multidisciplinary
Jian Qin, Yu-Hao Deng, Han-Sen Zhong, Li-Chao Peng, Hao Su, Yi-Han Luo, Jia-Min Xu, Dian Wu, Si-Qiu Gong, Hua-Liang Liu, Hui Wang, Ming-Cheng Chen, Li Li, Nai-Le Liu, Chao-Yang Lu, Jian-Wei Pan
Summary: Quantum metrology aims to enhance measurement sensitivity by utilizing quantum resources. We propose and realize a novel quantum metrology scheme that combines unconventional nonlinear interferometers and stimulated emission of squeezed light. Our method achieves a scalable, unconditional, and robust quantum metrological advantage, outperforming ideal 5-N00N states. The demonstrated enhancement in Fisher information per photon, without discounting for imperfections or photon loss, makes our approach applicable in practical quantum metrology at low photon flux regime.
PHYSICAL REVIEW LETTERS
(2023)
Article
Physics, Multidisciplinary
Xue-Mei Gu, Liang Huang, Alejandro Pozas-Kerstjens, Yang-Fan Jiang, Dian Wu, Bing Bai, Qi-Chao Sun, Ming-Cheng Chen, Jun Zhang, Sixia Yu, Qiang Zhang, Chao-Yang Lu, Jian-Wei Pan
Summary: Nonlocality in networks composed of independent sources exhibits different phenomena compared to standard Bell scenarios. Network nonlocality in the entanglement-swapping scenario has been extensively studied, but previous violations of bilocality inequality could not certify the nonclassicality of their sources. We experimentally observe full network nonlocal correlations in a network where the loopholes of source-independence, locality, and measurement-independence are closed. Our experiment violates known inequalities for nonfull network nonlocal correlations by over 5 standard deviations, confirming the absence of classical sources.
PHYSICAL REVIEW LETTERS
(2023)
Article
Multidisciplinary Sciences
Kaiyi Qian, Kai Wang, Leizhen Chen, Zhaohua Hou, Mario Krenn, Shining Zhu, Xiao-Song Ma
Summary: The interference of quanta is central to quantum physics, and the generalization of single-quanta interference to multiple particles creates entanglement. Entanglement allows non-local correlations between particles and is crucial for quantum information technology. However, we demonstrate that entanglement is not necessary for non-local quantum interference and show that multiphoton interference can occur without entanglement. This discovery has implications for the foundations of quantum physics and potential applications in quantum technologies.
NATURE COMMUNICATIONS
(2023)
Article
Physics, Multidisciplinary
Guo-Xian Su, Hui Sun, Ana Hudomal, Jean-Yves Desaules, Zhao-Yu Zhou, Bing Yang, Jad C. Halimeh, Zhen-Sheng Yuan, Zlatko Papie, Jian-Wei Pan
Summary: The ongoing quest for understanding nonequilibrium dynamics of complex quantum systems has led to the discovery of quantum many-body scarring. This phenomenon allows for the delay of thermalization by preparing the system in special initial states. In this study, the researchers demonstrate many-body scarring in a Bose-Hubbard quantum simulator, using previously unknown initial conditions. This work opens up new possibilities for exploring the relationship between scarring and various quantum phenomena.
PHYSICAL REVIEW RESEARCH
(2023)
Article
Optics
Jin Cao, Huan Yang, Zhen Su, Xin-Yao Wang, Jun Rui, Bo Zhao, Jian-Wei Pan
Summary: We have successfully prepared a quantum degenerate mixture of 23Na 40K molecules and 40K atoms. The atoms are highly degenerate with a large number ratio, while the molecules are in a moderately degenerate state. The elastic collisions between the atoms and molecules provide a thermalization mechanism, allowing the molecules to reach thermal equilibrium before significant losses occur. The degeneracy of the molecules is maintained for a sufficient time interval for further study and production of ultracold triatomic molecular gases.
