Papers
Live trends in quantum computing research, updated daily from arXiv.
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13,405 papers in 12 months (-22% vs prior quarter)
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Hardware platform mentions in abstracts — Photonic leads
Maximum heralding probabilities of non-classical state generation from two-mode Gaussian state via photon counting measurements
Jaromír Fiurášek·Oct 2, 2025
Highly non-classical states of light - such as the approximate Gottesman-Kitaev-Preskill states or cat-like states - can be generated from experimentally accessible Gaussian states via photon counting measurements on selected modes, conditioned on sp...
The Constant Geometric Speed Schedule for Adiabatic State Preparation: Towards Quadratic Speedup without Prior Spectral Knowledge
Mancheon Han, Hyowon Park, Sangkook Choi·Oct 2, 2025
The efficiency of adiabatic quantum evolution is governed by the evolution time $T$, which typically scales as $\mathcal{O}(Δ^{-2})$ with the minimum energy gap $Δ$. However, the rigorous lower bound is $\mathcal{O}(LΔ^{-1})$, where $L$ is the adiaba...
Hybrid Quantum-Classical Walks for Graph Representation Learning in Community Detection
Adrián Marın, Mauricio Soto-Gomez, Giorgio Valentini +3 more·Oct 2, 2025
Graph Representation Learning (GRL) has emerged as a cornerstone technique for analysing complex, networked data across diverse domains, including biological systems, social networks, and data analysis. Traditional GRL methods often struggle to captu...
Temporal Pulse Origins in Atom Interferometric Quantum Sensors
Jack Saywell, Nikolaos Dedes, Max Carey +2 more·Oct 2, 2025
Quantum sensors based upon atom interferometry typically rely on radio-frequency or optical pulses to coherently manipulate atomic states and make precise measurements of inertial and gravitational effects. An advantage of these sensors over their cl...
Folding lattice proteins confined on minimal grids using a quantum-inspired encoding
Anders Irbäck, Lucas Knuthson, Sandipan Mohanty·Oct 2, 2025
Steric clashes pose a challenge when exploring dense protein systems using conventional explicit-chain methods. A minimal example is a single lattice protein confined on a minimal grid, with no free sites. Finding its minimum energy is a hard optimiz...
Counterfactual quantum measurements
Ingita Banerjee, Kiarn T. Laverick, Howard M. Wiseman·Oct 2, 2025
Counterfactual reasoning plays a crucial role in exploring hypothetical scenarios, by comparing some consequent under conditions identical except as results from a differing antecedent. David Lewis' well-known analysis evaluates counterfactuals using...
Comment on Marek Czachor article entitled "On Relativity of Quantumness as Implied by Relativity of Arithmetic and Probability"
Krzysztof Sienicki, Mikołaj Sienicki·Oct 2, 2025
Czachor's model of hierarchical arithmetics begins with a valid formal premise but fixes the key probability mapping g by importing the Born rule and Fubini-Study metric from standard quantum mechanics, where Born probabilities are Kolmogorov within ...
Purcell-enhanced single-photon generation from CsPbBr$_3$ quantum dots in in-situ selected Laguerre-Gaussian modes
Virginia Oddi, Darius Urbonas, Etsuki Kobiyama +9 more·Oct 2, 2025
Single photons in Laguerre-Gaussian (LG) beams, which carry orbital angular momentum (OAM), could enable more robust and efficient photonic quantum communication and information processing, as well as enhanced sensitivity in quantum metrology and ima...
Hybrid biphoton spectrometer for time-resolved quantum spectroscopy across visible and near-infrared regions
Ozora Iso, Koya Onoda, Nicola J. Fairbairn +4 more·Oct 2, 2025
Joint spectral measurements are a powerful tool for characterising biphoton spectral correlation, which is crucial for quantum information and communication technologies. In these applications, highly pure biphoton states are essential in any time- a...
Topological Hall effect in nonlinear optics
Soumik Nandi, Arannya Ghosh, Ashok K Mohapatra +1 more·Oct 2, 2025
We present an experimental evidence of \emph{topological} Hall-effect in an all-optical third-order nonlinear optical process via spatial symmetry-breaking in pseudo-spin textures created by a spatially-structured pump laser beam. The experimental co...
Three-Dimensional Niobium Coaxial Cavity with $\sim0.1\,$second Lifetime
Takaaki Takenaka, Takayuki Kubo, Imran Mahboob +4 more·Oct 2, 2025
We report on the internal quality factor of a three-dimensional niobium quarter-wave coaxial cavity, with mid-temperature annealing, exhibiting $Q_{\rm int} \gtrsim 3\times10^9$ at the single-photon level below 20\,mK, which corresponds to an interna...
Background Suppression in Quantum Sensing of Dark Matter via Collective Entangled-State Projection
Shion Chen, Hajime Fukuda, Yutaro Iiyama +5 more·Oct 2, 2025
We show that measuring dark matter signal by projecting quantum sensors in the collective excited state can highly suppress the non-collective noise background, hence improving the sensitivity significantly. We trace the evolution of the sensors' sta...
From quantum feature maps to quantum reservoir computing: perspectives and applications
Casper Gyurik, Filip Wudarski, Evan Philip +5 more·Oct 2, 2025
We explore the interplay between two emerging paradigms: reservoir computing and quantum computing. We observe how quantum systems featuring beyond-classical correlations and vast computational spaces can serve as non-trivial, experimentally viable r...
Tunable Wigner Molecules in a Germanium Quantum Dot
Chenggang Yang, Jun Lu, Hongzhang Wang +7 more·Oct 2, 2025
The interplay between Coulomb interactions and kinetic energy underlies many exotic phases in condensed matter physics. In a two-dimensional electronic system, If Coulomb interaction dominates over kinetic energy, electrons condense into a crystallin...
Self-Sustained Oscillations of a Nonlinear Optomechanical System in the Low-Excitation Regime
Shivangi Dhiman, K. Rubenbauer, T. Luschmann +3 more·Oct 2, 2025
Manifesting across all time, mass and length scales, nonlinearities lie at the core of numerous physical phenomena. Next-generation quantum applications, such as quantum sensing, require the combination of nonlinearity with non-classical correlations...
Emergence and localization of exceptional points in an exactly solvable toy model
Miloslav Znojil·Oct 2, 2025
The most elementary non-Hermitian quantum square-well problem with real spectrum is considered. The Schroedinger equation is required discrete and endowed with PT-symmetric Robin (i.e., two-parametric) boundary conditions. Some of the rather enigmati...
Extracting the photon indistinguishability error from measurable quantum observables
Franciscus H. B. Somhorst, Jason Saied, Eleanor G. Rieffel +1 more·Oct 2, 2025
We present a method to extract the photon indistinguishability error from Hong-Ou-Mandel interference measurements, accounting for the combined effects of loss and multiphoton noise that contaminate the single-photon Hilbert space. Our analysis resol...
Benchmarking Quantum Simulation Methods
Calvin Ku, Yu-Cheng Chen, Alice Hu +1 more·Oct 2, 2025
Quantum Phase Estimation (QPE) is a cornerstone algorithm for fault-tolerant quantum computation, especially for electronic structure calculations of chemical systems. To accommodate the diverse characteristics of quantum chemical systems, numerous v...
Exponential Quantum Advantage for Message Complexity in Distributed Algorithms
François Le Gall, Maël Luce, Joseph Marchand +1 more·Oct 2, 2025
We investigate how much quantum distributed algorithms can outperform classical distributed algorithms with respect to the message complexity (the overall amount of communication used by the algorithm). Recently, Dufoulon, Magniez and Pandurangan (PO...
Entanglement distribution via satellite: an evaluation of competing protocols assuming realistic free-space optical channels
Nicholas Zaunders, Timothy C. Ralph·Oct 2, 2025
A key technical requirement of any future quantum network is the ability to distribute quantum-entangled resources between two spatially separated points at a high rate and high fidelity. Entanglement distribution protocols based on satellite platfor...