Article
Computer Science, Information Systems
Jian Li, Fanting Che, Zhuo Wang, Jun Yang
Summary: A new high-capacity quantum privacy comparison (QPC) protocol is proposed using two-photon six-qubit hyperentangled Bell states and hyper-coding, aiming to achieve a high utilization of quantum resources. The protocol allows two particles of hyperentangled Bell states to compare the equality of 6 classical bits of secret information between two quantum users. Unitary operations are used to encode the secret information and achieve dense coding. The proposed protocol utilizes decoy photons and the quantum uncertainty principle for transmission channel security and particle security, and demonstrates significant advantages in quantum efficiency compared to other QPC protocols.
Article
Optics
Rocco Duquennoy, Maja Colautti, Ramin Emadi, Prosenjit Majumder, Pietro Lombardi, Costanza Toninelli
Summary: Scalability and miniaturization are features of solid-state platforms for photonic quantum technologies, but achieving two-photon interference from distinct emitters on a chip remains a challenge. Molecular single-photon sources provide a promising platform for quantum interference experiments by tuning the emission frequency.
Article
Optics
Mads M. Lund, Fan Yang, Klaus Molmer
Summary: We numerically simulate the interaction of photon pulses with a two-level scatterer in a chiral waveguide QED setup using a cascaded system approach. The scattering of a two-photon pulse may result in the predominant population of only two output wave packet modes in an entangled state, |2 , 0) - |0 , 2). In a complementary wave-packet basis, this is a product state of two orthogonal single-photon wave packets. Reversing this process allows the perfect merging of distinguishable single-photon wave packets into a single-mode pulse carrying two identical photons.
Article
Physics, Multidisciplinary
Frank Schlawin
Summary: In this paper, the two-photon absorption (TPA) of entangled photons in a molecular ensemble with inhomogeneous broadening is simulated. The results are compared with the case of homogeneous broadening, and the consequences for the possible quantum enhancement of TPA cross sections are discussed. It is found that although there are differences in the TPA cross section, the difference always remains small and of the order unity. The impact of the polarization degrees of freedom is further considered, and the orientational average of a model system Hamiltonian is carried out. Certain molecular geometries are found to give rise to a substantial polarization dependence of the entangled TPA rate, which can increase the TPA cross section by up to a factor of five.
FRONTIERS IN PHYSICS
(2022)
Article
Optics
Xin Hua, Tommaso Lunghi, Florent Doutre, Panagiotis Vergyris, Gregory Sauder, Pierrick Charlier, Laurent Labonte, Virginia D'Auria, Anthony Martin, Sorin Tascu, Marc P. De Micheli, Sebastien Tanzilli, Olivier Alibart
Summary: Progress in integrated photonics allows the combination of multiple elementary functions on single substrates to achieve advanced functionalized chips. The study demonstrates a monolithic integrated quantum photonics realization on lithium niobate, showcasing the generation of configurable two-photon states with high visibility.
Article
Optics
Qingmei Hu, Junhua Dong, Jianbo Yin, Bingsuo Zou, Yongyou Zhang
Summary: The study examines the scattering and correlation properties of a two-photon pulse in a four-terminal waveguide system where two one-dimensional waveguides are connected by a Jaynes-Cummings emitter (ICE). It is found that when the width of the incident two-photon Gaussian pulse is much larger than the photon wavelength, the transmission spectra approach that of single photon cases. However, when the pulse width is comparable to the photon wavelength, both transmission and correlation show strong dependence on the pulse width. Resonant scattering and photon interference play significant roles in determining the two-photon correlation in the system.
Article
Physics, Multidisciplinary
Jian Li, Fanting Che, Zhuo Wang, Anqi Fu
Summary: A new QPC protocol based on GHZ-like states is proposed, which improves the efficiency of private comparison by adopting unitary operations instead of QKD. The protocol utilizes decoy photon technique to detect channel eavesdropping, ensuring resistance to external attacks. The protocol achieves a quantum efficiency of 66% and has advantages in terms of quantum efficiency and quantum resources compared to previous schemes.
Article
Optics
Olli Siltanen, Tom Kuusela, Jyrki Piilo
Summary: This paper fills the research gap by considering the polarization-frequency interaction in a quantum interferometer, analyzing theoretical aspects such as biphoton polarization states and coincidence probability, and outlining various interesting applications ranging from constructing Bell states to an alternative delayed choice quantum eraser.
Article
Quantum Science & Technology
Yuan Tian, Jian Li, Xiu-Bo Chen, Chong-Qiang Ye, Heng-Ji Li
Summary: An efficient semi-quantum secret sharing protocol based on Bell states is proposed in this study, which is more flexible and practical compared to existing protocols, and the qubit efficiency is increased significantly.
QUANTUM INFORMATION PROCESSING
(2021)
Article
Physics, Multidisciplinary
Markus Hiekkamaki, Robert Fickler
Summary: Two-photon interference in multiple transverse-spatial modes along a single beam-path was studied, with observations of coalescence and anticoalescence in different spatial-mode multiports. This operation within spatial modes along a single beam path eliminates the need for interferometric stability and presents new pathways for implementing complex quantum information tasks using linear optical networks.
PHYSICAL REVIEW LETTERS
(2021)
Article
Optics
Saumya Biswas, S. J. van Enk
Summary: This article introduces a model for describing a type of two-photon detector consisting of one molecule that can detect two photons arriving sequentially in time. The detector model includes a Hamiltonian description for amplifying the microscopic change and converting it into a macroscopic signal.
Article
Quantum Science & Technology
Xi Huang, Wen-Fang Zhang, Shi-Bin Zhang
Summary: The paper proposes an efficient multiparty quantum private comparison (MQPC) protocol based on single photons and rotation encryption with the assistance of a semi-honest third party (TP). The protocol improves efficiency and practicality by implementing rotation encryption and multiplexing of single photons. It does not require complex quantum technologies and has been demonstrated to be resistant to different types of attacks through security analysis and simulation on IBM Quantum Experience.
QUANTUM INFORMATION PROCESSING
(2023)
Article
Multidisciplinary Sciences
Bing Gu, Daniel Keefer, Flavia Aleotti, Artur Nenov, Marco Garavelli, Shaul Mukamel
Summary: This study demonstrates that two-photon excitation with quantum light can influence elementary photochemical events, with simulations showing how entangled two-photon excitation affects azobenzene trans -> cis isomerization. Photon entanglement modulates nuclear wave packets, influencing the reaction transition state and product yield. The distribution of vibronic coherences during conical intersection passage strongly depends on the initial wave packet shape upon quantum light excitation, with X-ray signals simulated for experimental monitoring.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Physics, Multidisciplinary
Yi-Ting Wu, Hong Chang, Gong-De Guo, Song Lin
Summary: The protocol proposes a multi-party quantum key agreement utilizing quantum entanglement swapping, with the introduction of a semi-trusted third party for preparing Bell states. Classical hash functions and Hadamard operations are used for authentication, with the security ensured by correlations of GHZ states. The analysis shows that the protocol is secure in theory against common attacks.
INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS
(2021)
Review
Physics, Multidisciplinary
Min Xiao, ChunAn Ma
Summary: This research proposes a quantum private comparison protocol using single photons as quantum resources. Compared to other protocols, it has the advantages of low cost and easy implementation, but noise poses a challenge to the comparison results. To address this issue, classical linear block codes are used as error correction codes to improve encoding efficiency and correct errors. Security analysis shows that this protocol can withstand various typical attacks.
INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS
(2022)
