Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Advantages of Global Entanglement-Distillation Policies in Quantum Repeater Chains
Iftach Yakar, Michael Ben-Or·Oct 8, 2025
Quantum repeaters are essential for achieving long-distance quantum communication due to photon loss, which grows exponentially with the channel distance. Current quantum repeater generations use entanglement distillation protocols, where the decisio...
Optimal filtering and generation of entangled photons for quantum applications in the presence of noise
Jordan M. Thomas, Andrew R. Cameron, Akil Pathiranage +6 more·Oct 8, 2025
Filtering is commonly used in quantum optics to reject noise photons, and also to enable interference between independent photons. However, filtering the joint spectrum of photon pairs can reduce the inherent coincidence probability or loss-independe...
Non-Gaussian states via pump-depleted SPDC
Colin Vendromin, Samuel E. Fontaine, J. E. Sipe·Oct 7, 2025
We develop a model for non-Gaussian state generation via spontaneous parametric down-conversion (SPDC) in InGaP microring resonators. The nonlinear Hamiltonian is written in terms of the asymptotic fields for the system, which includes a phantom chan...
High-dimensional detection-loophole-free measurement-device-independent quantum random number generator
Joakim Argillander, Daniel Spegel-Lexne, Martin Clason +4 more·Oct 7, 2025
Certifying random number generators is challenging, especially in security-critical fields like cryptography. Here, we demonstrate a measurement-device-independent quantum random number generator (MDI-QRNG) using high-dimensional photonic path states...
Optimised spectral purity of unfiltered photons via pump and nonlinearity shaping
Tommaso Faleo, Christopher L. Morrison, Roméo Beignon +6 more·Oct 7, 2025
Photonic quantum technologies rely on the efficient generation and interference of indistinguishable photons. Exceptional achievements in this respect have been obtained by domain engineering of quasi-phase-matched parametric down-conversion sources,...
Quantumness and its hierarchies in PT-symmetric down-conversion models
Jan Peřina, Karol Bartkiewicz, Grzegorz Chimczak +4 more·Oct 7, 2025
We investigate the hierarchy of quantum correlations in a quadratic bosonic parity-time-symmetric system (PTSS) featuring distinct dissipation and amplification channels. The hierarchy includes global nonclassicality, entanglement, asymmetric quantum...
Quantum Strategies to Overcome Classical Multiplexing Limits
Tzula B. Propp, Jeroen Grimbergen, Emil R. Hellebek +5 more·Oct 7, 2025
Near-term quantum networks face a bottleneck due to low quantum communication rates. This degrades performance both by lowering operating speeds and increasing qubit storage time in noisy memories, making some quantum internet applications infeasible...
Entanglement dynamics and performance of two-qubit gates for superconducting qubits under non-Markovian effects
Kiyoto Nakamura, Joachim Ankerhold·Oct 7, 2025
Within a numerically exact simulation technique, the dissipative dynamics of a two-qubit architecture is considered in which each qubit couples to its individual noise source (reservoir). The goal is to reveal the role of subtle qubit-reservoir corre...
Efficient Post-Selection for General Quantum LDPC Codes
Seok-Hyung Lee, Lucas H. English, Stephen D. Bartlett·Oct 7, 2025
Post-selection strategies that discard low-confidence computational results can significantly improve the effective fidelity of quantum error correction at the cost of reduced acceptance rates, which can be particularly useful for offline resource st...
Observation of Genuine Tripartite Non-Gaussian Entanglement from a Superconducting Three-Photon Spontaneous Parametric Down-Conversion Source
Benjamin Jarvis-Frain, Andy Schang, Fernando Quijandría +5 more·Oct 6, 2025
The generation of entangled photons through Spontaneous Parametric Down-Conversion (SPDC) is a critical resource for many key experiments and technologies in the domain of quantum optics. Historically, SPDC was limited to the generation of photon pai...
Quantum Concept Music Score from Quantum Picturalism: Musical Incarnation of a Bell-Pair under Measurements
Rakhat-Bi Abdyssagin, Bob Coecke·Oct 6, 2025
We initiate the development of a new language and theory for quantum music, to which we refer as Quantum Concept Music (QCM). This new music formalism is based on Categorical Quantum Mechanics (CQM), and more specifically, its diagrammatic incarnatio...
Peaked quantum advantage using error correction
Abhinav Deshpande, Bill Fefferman, Soumik Ghosh +2 more·Oct 6, 2025
A key issue of current quantum advantage experiments is that their verification requires a full classical simulation of the ideal computation. This limits the regime in which the experiments can be verified to precisely the regime in which they are a...
Randomness from causally independent processes
Martin Sandfuchs, Carla Ferradini, Renato Renner·Oct 6, 2025
We consider a pair of causally independent processes, modelled as the tensor product of two channels, acting on a possibly correlated input to produce random outputs X and Y. We show that, assuming the processes produce a sufficient amount of randomn...
Leveraging Analog Neutral Atom Quantum Computers for Diversified Pricing in Hybrid Column Generation Frameworks
Cédrick Perron, Yves Bérubé-Lauzière, Victor Drouin-Touchette·Oct 6, 2025
In this work, we develop new pulse designs and embedding strategies to improve the analog quantum subroutines of hybrid column generation (CG) algorithms based on neutral-atoms quantum computers (NAQCs). These strategies are designed to improve the q...
Efficient three-qubit gates with giant atoms
Guangze Chen, Anton Frisk Kockum·Oct 6, 2025
Three-qubit gates are highly beneficial operations in quantum computing, enabling compact implementations of quantum algorithms and efficient generation of multipartite entangled states. However, realizing such gates with high fidelity remains challe...
Integrated photonic platform with high-speed entanglement generation and witnessing
Gong Zhang, Chao Wang, Koon Tong Goh +10 more·Oct 6, 2025
High-speed generation and efficient entanglement detection on a photonic chip are essential for quantum information applications but hard to achieve due to common photonic chips' material properties and limited component performance. In this work, we...
Black-Box Separation Between Pseudorandom Unitaries, Pseudorandom Isometries, and Pseudorandom Function-Like States
Aditya Gulati, Yao-Ting Lin, Tomoyuki Morimae +1 more·Oct 6, 2025
Pseudorandom functions (PRFs) are one of the most fundamental primitives in classical cryptography. On the other hand, in quantum cryptography, it is possible that PRFs do not exist but their quantum analogues could exist, and still enabling many app...
Time-resolved characterization of pulsed squeezed light from a strongly driven silicon nitride microresonator
Emanuele Brusaschi, Marco Liscidini, Matteo Galli +2 more·Oct 5, 2025
Silicon nitride microresonators driven by strong pump pulses can generate squeezed light in a dominant spectral-temporal mode, a central resource for continuous-variable quantum computation. In the high parametric gain regime, several effects, includ...
From Qubits to Rhythm: Exploring Quantum Random Walks in Rhythmspaces
María Aguado-Yáñez, Karl Jansen, Daniel Gómez-Marín +1 more·Oct 4, 2025
A quantum computing algorithm for rhythm generation is presented, which aims to expand and explore quantum computing applications in the arts, particularly in music. The algorithm maps quantum random walk trajectories onto a rhythmspace -- a 2D inter...
Broadband Quantum Photon Source in Step-Chirped Periodically Poled Lithium Niobate Waveguide
Xiao-Xu Fang, Guoliang Shentu, He Lu·Oct 4, 2025
Broadband nonlinear optical devices play a critical role in both classical and quantum optics. Here, we design and fabricate a 6.82-mm-long step-chirped periodically poled lithium niobate~(CPPLN) waveguide on lithium niobate on insulator, which enabl...