Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Distilling Unitary Operations: A No-Go Theorem and Minimal Realization
Jiayi Zhao, Yu-Ao Chen, Guocheng Zhen +3 more·Apr 1, 2026
Quantum gates executed on physical hardware are inevitably degraded by environmental noise. While state purification effectively distills static quantum resources, the dynamic execution of quantum algorithms requires a higher-order approach to mitiga...
Geometry-induced correlated noise in qLDPC syndrome extraction
Angelo Di Bella·Apr 1, 2026
With code and syndrome-extraction schedule fixed, can routed geometry alone change the correlated fault model enough to impact logical performance? Starting from a geometry-conditioned same-tick interaction Hamiltonian, we derive a controlled retaine...
Error bounds for splitting methods in unitary problems
Fernando Casas, Ander Murua·Apr 1, 2026
Splitting methods constitute a widely used class of numerical integrators for ordinary and partial differential equations, particularly well suited to problems that can be decomposed into simpler subproblems. High-order splitting schemes are availabl...
A Factorization Identity for Twisted Multinomial Coefficients with Application to Pilot States in Hamiltonian Decoded Quantum Interferometry
Pawel Wocjan·Apr 1, 2026
The $q$-multinomial coefficient, a classical object in enumerative combinatorics, counts permutations of multisets weighted by the number of inversions, with a single deformation parameter $q$. We introduce the twisted multinomial coefficient, in whi...
Properties of multiqubit variational quantum states representing weighted graphs and their computing with quantum programming
Kh. P. Gnatenko, A. Kaczmarek·Apr 1, 2026
We study multiqubit variational quantum states that can be considered as weighted quantum graph states. These states are constructed as single-layer variational circuits with $RX$ rotations and $RZZ$ entangling gates, corresponding to graphs of arbit...
Two-Qubit Implementation of QAOA for MAX-CUT on an NV-Center Quantum Processor
Leon E. Röscher, Talía L. M. Lezama, Luca Cimino +3 more·Apr 1, 2026
We report a proof-of-principle implementation of the quantum approximate optimization algorithm (QAOA) for the smallest nontrivial MAX-CUT instance on an NV-center-based quantum processor operating at room temperature. The two-qubit register is encod...
Two Problems on Quantum Computing in Finite Abelian Groups
Ulises Pastor-Díaz, José M. Tornero·Apr 1, 2026
In the context of finite Abelian groups two problems are presented and solved using quantum computing techniques. The first is the well--known Hidden Subgroup Problem, originally solved by Simon in a landmark work. The second is the Fully Balanced Im...
Multi-Mode Quantum Annealing for Variational Autoencoders with General Boltzmann Priors
Gilhan Kim, Daniel K. Park·Apr 1, 2026
Variational autoencoders (VAEs) learn compact latent representations of complex data, but their generative capacity is fundamentally constrained by the choice of prior distribution over the latent space. Energy-based priors offer a principled way to ...
Quantum walk on a random comb
François David, Thordur Jonsson·Apr 1, 2026
We study continuous time quantum walk on a random comb graph with infinite teeth. Due to localization effects along the spine, the walk cannot go to infinity in the spine direction, while it can escape to infinity along the teeth of the comb. Startin...
The effect of staggered nonlinearity on the Su-Schrieffer-Heeger model
Ahmed Alharthy, RW Bomantara·Apr 1, 2026
We investigate the spectral properties of the Su-Schrieffer-Heeger (SSH) model with sublattice-dependent onsite nonlinearity. Two complementary approaches are employed in our studies. First, Bloch state solutions under periodic boundary conditions ar...
Ground-state solution of quantum droplets in Bose-Bose mixtures
Wei Liu, Limin Xu·Apr 1, 2026
In this paper, we present a systematic study on the ground state computation of quantum droplets in homonuclear Bose-Bose mixtures, governed by the extended Gross-Pitaevskii equations (eGPEs) with Lee-Huang-Yang (LHY) corrections. This model captures...
Conditions for 3-partite and 4-partite genuine entanglement
Mark Hillery·Apr 1, 2026
A system of three or four particle can be entangled in a number of different ways. It may be the case that only subsets of the particles are entangled, and these subsets are not entangled with each other. It may also be the case that the state is the...
Quantum Simulation of Cranked Zirconium Isotopes: A Fixed-N Approach with a Structured Number-Conserving Ansatz
Abhishek, Nabeel Salim, P. Arumugam·Apr 1, 2026
We present a methodological study of quantum simulation of cranking in a Nilsson $+$ pairing Hamiltonian on a fixed deformation grid. The many-body Routhian is mapped to qubits via the Jordan--Wigner transformation and minimized using the Variational...
Highly-Parallel Atom-Detection Accelerator for Tweezer-Based Neutral Atom Quantum Computers
Jonas Winklmann, Yian Yu, Xiaorang Guo +2 more·Apr 1, 2026
Neutral atom quantum computers (NAQCs) are among the most promising computational platforms for quantum computing. Controlling and measuring individual atoms and their states, which often requires multiple imaging and image-analysis procedures, is ty...
Unitary Encoding of Thermal States via Thermofield Dynamics on Quantum Computers
G. X. A. Petronilo, M. R. Araújo, A. B. M. Souza +1 more·Apr 1, 2026
Quantum computing has attracted the attention of the scientific community in the past few decades. However, despite some relevant advantages, near-term quantum devices remain severely limited by thermal effects, which induce decoherence and restrict ...
Vibrationally Induced Resonances in Lasing
Kai Müller, Kimmo Luoma, Christian Schäfer·Apr 1, 2026
Optical circuits and light sources, such as lasers, undergo continuous miniaturization. In its extreme, nanolasers might be comprised of only a few molecules confined in plasmonic nanoresonators. Few-emitter lasers promise low energy requirements and...
Lower Bounds on Coherent State Rank
Florian Cottier, Ulysse Chabaud·Apr 1, 2026
The approximate coherent state rank is the minimal number of (classical) coherent states required to approximate a continuous-variable bosonic quantum state and directly relates to the classical complexity of simulating bosonic computations. Despite ...
Probing topological edge states in a molecular synthetic dimension
Adarsh P. Raghuram, Francesca M. Blondell, Jonathan M. Mortlock +7 more·Apr 1, 2026
Engineering synthetic dimensions, where the physics of additional spatial dimensions is simulated within the internal states of a quantum system, allows the realisation of phenomena not otherwise accessible in experiments. Ultracold ground-state pola...
Engineering a Phase-Noise-Based Quantum Random Number Generator for Real-Time Secure Applications: Design, Validation, and Scalability
Anurag K. S. V., Shubham Chouhan, K. Srinivasan +2 more·Apr 1, 2026
Random Number Generators (RNGs) are crucial for applications ranging from cryptography to simulations. Depending on the source of randomness, RNGs are classified into Pseudo-Random Number Generators (PRNGs), True Random Number Generators (TRNGs), and...
Tunable information insulation induced by constraint mismatch
Akshay Panda, Anwesha Chattopadhyay·Apr 1, 2026
We study a composite model of two $1D$ $PXP$ chains with dual constraints, forming a junction that acts as an infinite kinematic barrier to quantum information exchange. Moreover, the hard wall at the junction which acts as a perfect reflector, preve...