Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Genuine Global Kochen-Specker Contextuality as Classical Coordination Cost
Ming Yang·Jun 22, 2026
Classical simulations of quantum correlations can fail because no low-communication local hidden-variable model exists, or because no single noncontextual hidden state can explain all compatible measurement contexts. This manuscript studies a third r...
Structure-Aware Variance Reduction for Unbiased Randomized Hamiltonian Simulation
Joshua W. Dai, Fredrik Hasselgren, Chusei Kiumi·Jun 22, 2026
Randomized Hamiltonian simulation methods are often governed by a trade-off between systematic bias and sampling overhead. We study how classical variance-reduction techniques can be applied to such methods without changing their mean channel, and th...
Structure and information measures of few-electron systems under a spherically symmetric Gaussian potential within a density functional approach
Raveena Arya, Santanu Mondal, Amlan K. Roy·Jun 22, 2026
Energies of H, He-like ($Z=2-18$) ions, Li, and Be are investigated under a spherically symmetric Gaussian potential through a density functional formalism. The radial Kohn-Sham equation has been solved by invoking a work function-based exchange pote...
How Stark units enter SIC overlaps
Ingemar Bengtsson, Gary McConnell·Jun 22, 2026
It has been observed that the mutual scalar products of the vectors in a SIC-POVM are given by algebraic units, and at least in some cases by square roots of Stark units. The full picture is somewhat more complicated, especially if non-minimal SIC-PO...
An Open-Source LFSR-Based Stochastic Leaky Integrate-and-Fire Neuron in SkyWater 130 nm: Design, Stochastic Characterisation, and Rate Coding
Poornima Kumaresan, Santhosh Sivasubramani·Jun 22, 2026
Stochastic spiking neurons trade exact arithmetic for controlled randomness, lowering area and tolerating input noise, which suits event-driven edge hardware. We present a compact, configurable stochastic leaky integrate-and-fire neuron in standard-c...
Prethermal rotating-frame solid echo in a dipolar nuclear-spin network
Quentin Reynard-Feytis, William Beatrez, Leo Joon Il Moon +2 more·Jun 22, 2026
Floquet prethermalization can endow interacting quantum solids with long-lived, approximately conserved quantities, enabling Hamiltonian engineering and new dynamical probes. Using a hyperpolarized network of dipolar-coupled $^{13}$C nuclear spins in...
Improved State Readout in NV Centers using Regression Models and Rabi Driving
Fritz Haltenberger, Manpreet Singh Jattana·Jun 22, 2026
Readout of state populations in nitrogen-vacancy centers from fluorescence measurements at room-temperature is routinely achieved via contrast-based calibration. The fidelities achieved by this conventional approach are limited by reducing the dynami...
Dissipative preparation of Laughlin-like states
Tong Liu·Jun 22, 2026
Fractional quantum Hall (FQH) states are a central paradigm of strongly correlated quantum matter and a key platform for topological quantum computation. Here, we propose a purely dissipative protocol based on local loss and pump channels for prepari...
Full-Field Mode Sorter for Optical Knots
Tareq Jaouni, Roohollah Ghobadi, Ebrahim Karimi·Jun 22, 2026
Optical knots are topologically structured light fields whose phase or polarization singularities trace linked or knotted trajectories during propagation, making them promising candidates for high-dimensional optical information carriers. Their use i...
Quantum Convolutional Neural Networks for Groundwater Heat Plume Prediction: A Surrogate Modeling Approach
Danyal Maheshwari, Julia Pelzer, Miriam Schulte·Jun 22, 2026
Quantum machine learning methods are increasingly explored for modeling complex environmental systems, including groundwater heat plume dynamics. In this work, we explore a Quantum Convolutional Neural Network (QCNN) as a surrogate model for predicti...
On the cryptographic potential of single-qubit rotations
Alex B. Grilo, Lucas Hanouz, Anne Marin·Jun 22, 2026
In the domain of quantum communication, cryptographic protocols often require users to have access to trusted qubit sources or detectors. Recently, it was shown that on an architecture called the Qline, several protocols can equivalently be performed...
Bounding Classical and Quantum Correlations in Bayesian Networks with Quasiprobabilities
Paul Becsi, Matty J. Hoban·Jun 22, 2026
Bell's theorem reveals that quantum theory is in tension with classical causal reasoning and, in particular, the notion of local causality. This is now understood as a particular example of non-classicality in the study of correlations in (Bayesian) ...
Ultra-Peripheral Collisions as a Nuclear-Structure Interferometer with Interpretable Multitask Deep Learning
Jing-Zong Zhang, Wang-Mei Zha, Lingxiao Wang +1 more·Jun 22, 2026
Precise knowledge of nuclear structure is essential across fundamental physics, yet probing these structures is notoriously difficult. To address this challenge, ultra-peripheral collisions (UPCs) provide a femtoscopic tomography for imaging the atom...
Irreversibility Enhances Quantum-Enhanced Markov-Chain Monte Carlo
Kefan Cao, Zidong Cui, Lei Wang +1 more·Jun 22, 2026
Detailed balance underlies conventional Markov-chain Monte Carlo (MCMC) algorithms. Yet in classical systems, breaking detailed balance generates irreversible probability currents and can accelerate sampling. Whether irreversibility can similarly enh...
The adaptive nature of confirmation bias
Dorje C. Brody, Karl J. Friston, Bernhard K. Meister +1 more·Jun 22, 2026
In this paper, the phenomenon generally classified as confirmation bias is formulated on the space of square-root probabilities (or equivalently, using the structures of quantum probability). In this framework, observations are modelled by matrices, ...
Fast quantum-state transfer in Su-Schrieffer-Heeger chains beyond the noninteracting regime
François Impens, David Guéry-Odelin·Jun 22, 2026
Shortcuts to adiabaticity have made topological edge-state transfer fast in the single-particle regime, but their extension to interacting systems is obstructed by nonlinear phase accumulation. We show that this obstruction can be removed in Su-Schri...
Jacobi exceptional orthogonal polynomials for extended Scarf I potentials with position-dependent mass
Christiane Quesne·Jun 22, 2026
We show that the Scarf I potential problem in a position-dependent mass background of the type $m(α;x) = (1 + α\sin x)^{-2}$, $0<α<1$, can be solved by using a point canonical transformation mapping the corresponding Schr\" odinger equation onto that...
Tuning Quantum MPS
Anna Leonteva, Maxime Outteryck, Guido Masella·Jun 22, 2026
Matrix Product State (MPS) methods are among the most effective approaches for the classical simulation of quantum circuits, but their practical performance depends strongly on simulator hyperparameters, and default settings are often suboptimal. In ...
Quantum Key Distribution Without Shared Reference Frame Under Unital Noise
Junaid ur Rehman, Shehbaz Tariq, Symeon Chatzinotas·Jun 22, 2026
We consider a general and practical scenario of quantum key distribution (QKD) over an unknown, stationary, unital qubit channel. Furthermore, due to practical limitations, e.g., relative movement and rotation of communicating parties, a global share...
Wess-Zumino terms in 0+1 SU(N) superspin systems
J. S. Morales, M. N. Kiselev·Jun 22, 2026
These notes present a self-contained introduction to Wess-Zumino (WZ) terms in quantum systems with $SU(N)$ symmetry, emphasizing the interplay between geometry, topology, and condensed-matter applications. We begin with the $SU(2)$ spin coherent-sta...