Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Performance Analysis of One- and Two-way DV-QKD with MIMO FSO Communication Systems
Sushil Kumar, Soumya P. Dash, George C. Alexandropoulos·Nov 7, 2025
This paper considers a multiple-input multiple-output (MIMO) wireless system wherein two legitimate users attempt to exchange secret keys over free-space optical (FSO) channels. Novel frameworks for the use of the one- and two-way discrete-variable q...
Coherent control of quantum states by quadratically chirped short laser pulses
G. P. Djotyan, A. A. Avetisyan, A. P. Djotyan·Nov 7, 2025
We present a novel scheme for coherent manipulation of populations and robust creation of arbitrary coherent superposition of metastable states of a quantum system with lambda configuration of operating energy levels using laser pulses with a quadrat...
Robust Quantum Teleportation Against Noise Using Weak Measurement and Flip Operations
Mohit Dhanik, Shraddha Sharma, Pitamber Mahanandia·Nov 7, 2025
This study presents an improved quantum teleportation protocol designed to enhance fidelity in noisy environments by combining weak measurements (WMs) with flip and reversal operations. In our scheme, Alice prepares a four-qubit entangled state and s...
Channel Superposition Mitigates Photon Loss Errors in Quantum Illumination
Fei Li, Xiao-Wei Li, Oscar Dahlsten·Nov 7, 2025
In quantum illumination, the probe photon is entangled with an ancilla photon, and both are jointly measured at the end. The entanglement between the probe and ancilla photons enhances the detection performance per unit average photon number in the p...
Compact localized fermions and Ising anyons in a chiral spin liquid
Tim Bauer, Johannes Reuther·Nov 7, 2025
Quasiparticle hybridization remains a major challenge to realizing and controlling exotic states of matter in existing quantum simulation platforms. We report the absence of hybridization for compact localized states (CLS) emerging in the chiral spin...
Ultimate photon entanglement in biexciton cascade
V. N. Mantsevich, D. S. Smirnov, E. L. Ivchenko·Nov 7, 2025
The polarization entanglement of photons emitted by semiconductor quantum dots is unavoidably limited by the spin fluctuations of the host lattice nuclei. To overcome this limitation, we develop a theory of entangled photon pair generation by a symme...
Bounds on quantum Fisher information and uncertainty relations for thermodynamically conjugate variables
Ye-Ming Meng, Zhe-Yu Shi·Nov 7, 2025
Uncertainty relations represent a foundational principle in quantum mechanics, imposing inherent limits on the precision with which \textit{mechanically} conjugate variables such as position and momentum can be simultaneously determined. This work es...
Analysis of Frequency Collisions in Parametrically Modulated Superconducting Circuits
Zhuang Ma, Peng Zhao, Xinsheng Tan +1 more·Nov 7, 2025
Superconducting circuits are a leading platform for scalable quantum computing, where parametric modulation is a widely used technique for implementing high-fidelity multi-qubit operations. A critical challenge, however, is that this modulation can i...
Continuous-variable Measurement Device Independent MIMO Quantum Key Distribution for THz Communications
Leixin Wu, Congtian Deng, Jiayu Pan +6 more·Nov 7, 2025
Although multiple-input multiple-output (MIMO) terahertz (THz) continuous-variable quantum key distribution (CVQKD) is theoretically secure, practical vulnerabilities may arise due to detector imperfections. This paper explores a CV measurement-devic...
Disorder-broadened topological Hall phase and anomalous Hall scaling in FeGe
Chaman Gupta, Chris Matsumura, Hongbin Yang +9 more·Nov 7, 2025
Magnetic skyrmions are topologically protected spin textures that are promising candidates for low-power spintronic memory and logic devices. Realizing skyrmion-based devices requires an understanding of how structural disorder affects their stabilit...
Several kinds of Gaussian quantum channels
Ruifen Ma, Yanjing Sun, Xiaofei Qi·Nov 7, 2025
Quantum steering is a crucial quantum resource that lies intermediate between entanglement and Bell nonlocality. Gaussian channels, meanwhile, play a foundational role in diverse quantum protocols, secure communication, and related fields. In this pa...
Single and Double-click High-Rate Entanglement Generation Between Distant Ions Using Multiplexed Atomic Ensembles
Benedikt Tissot, Soubhadra Maiti, Emil R. Hellebek +1 more·Nov 7, 2025
In an accompanying paper [1], we introduced an approach to interface trapped-ion quantum processors with ensemble-based quantum memories by matching a spontaneous parametric down conversion source to both the ions and the memories. This enables rapid...
Hybrid Action Reinforcement Learning for Quantum Architecture Search
Jiayang Niu, Yan Wang, Jie Li +4 more·Nov 7, 2025
Reinforcement learning-based Quantum Architecture Search (QAS) offers a promising avenue for automating the design of variational quantum circuits, but existing methods typically decouple discrete structure search from continuous parameter optimizati...
Distributed quantum approximate counting algorithm
Huaijing Huang, Daowen Qiu·Nov 7, 2025
In this article, we propose a distributed quantum algorithm for solving counting problem using Grover operator and a classical post-processing procedure. We apply the proposed algorithm to estimate inner products and Hamming distances. Simulations ar...
Quantum Algorithm for Local-Volatility Option Pricing via the Kolmogorov Equation
Nikita Guseynov, Mikel Sanz, Ángel Rodríguez-Rozas +2 more·Nov 7, 2025
The solution of option-pricing problems may turn out to be computationally demanding due to non-linear and path-dependent payoffs, the high dimensionality arising from multiple underlying assets, and sophisticated models of price dynamics. In this co...
Representational power of selected neural network quantum states in second quantization
Zhendong Li, Tong Zhao, Bohan Zhang·Nov 7, 2025
Neural network quantum states emerge as a promising tool for solving quantum many-body problems. However, its successes and limitations are still not well-understood in particular for Fermions with complex sign structures. Based on our recent work [J...
Universal and Tunable Sudden Freezing of Entanglement Volume
Luchang Niu, Joseph H. Eberly·Nov 7, 2025
In a system where two identical two-level atoms interact with their common one-mode cavity field, it is shown that entanglement can become abruptly frozen in time, remaining at a constant value for a period of time until it begins to thaw from this v...
On the Origin of the Hidden Symmetry in the Asymmetric Quantum Rabi Model
Yun-Tong Yang, Song-Ming Chen, Hong-Gang Luo·Nov 7, 2025
The introduction of an asymmetric term into the quantum Rabi model generally lifts energy-level degeneracies. However, when the asymmetry parameter takes specific multiples of the bosonic mode frequency, level degeneracies reappear$-$a phenomenon ref...
Spin-Network Quantum Reservoir Computing with Distributed Inputs: The Role of Entanglement
Sareh Askari, Youssef Kora, Christoph Simon·Nov 7, 2025
Reservoir computing is a promising neuromorphic paradigm, and its quantum implementation using spin networks has shown some advantage when entanglement is present. Here, we consider a distributed scenario in which two distinct input time series are i...
Programmable Adiabatic Rapid Passage laser pulses for Ultra-fast Gates on trapped ions
En-Teng An, Hao-Qing Zhang, Yun-Feng Huang +2 more·Nov 7, 2025
Scaling of quantum gates remains a central challenge in quantum information science. Ultrafast gates based on spin-dependent kicks provide a promising approach for trapped-ion systems. However, these gates require laser pulses with both high temporal...