Papers
Polaron Transformed Canonically Consistent Quantum Master Equation
Juzar Thingna, Xiansong Xu, Daniel Manzano·Apr 3, 2026
A central challenge in the theory of open quantum systems is the development of theoretical frameworks capable of accurately describing large, strongly interacting quantum many-body systems in the regime of strong system-bath interaction. In this wor...
RFOX (Rotated-Field Oscillatory eXchange) quantum algorithm: Towards Parameter-Free Quantum Optimizers
Brian García Sarmina, Guo-Hua Sun, Shi-Hai Dong·Apr 2, 2026
We introduce RFOX (Rotated-Field Oscillatory eXchange), a parameter-free quantum algorithm for combinatorial optimization. RFOX combines an almost constant non-stoquastic $XX$ catalyst with a weak harmonic $ZX$ counter-diabatic term. Using the Floque...
Open-source implementation of the anti-Hermitian contracted Schrödinger equation for electronic ground and excited states
Daniel Gibney, Anthony W Schlimgen, Jan-Niklas Boyn·Apr 2, 2026
Efficient simulation of strongly correlated electrons has become a routine tool in molecular electronic structure theory due to recent advances in approximate configuration interaction (CI) techniques. Nonetheless, the quantitative and predictive des...
AQ-Stacker: An Adaptive Quantum Matrix Multiplication Algorithm with Scaling via Parallel Hadamard Stacking
Wladimir Silva·Apr 2, 2026
Matrix multiplication (MatMul) is the computational backbone of modern machine learning, yet its classical complexity remains a bottleneck for large-scale data processing. We propose a hybrid quantum-classical algorithm for matrix multiplication base...
Q2NS Demo: A Quantum Network Simulator Based on ns-3
Francesco Mazza, Adam Pearson, Marcello Caleffi +1 more·Apr 2, 2026
Q2NS is an open-source quantum network simulator built on ns-3, the de facto standard for classical network simulation. By inheriting ns-3's mature classical stack and event-driven execution model, Q2NS enables faithful co-simulation of quantum-netwo...
Constrained Quantum Optimization via Iterative Warm-Start XY-Mixers
David Bucher, Maximilian Janetschek, Michael Poppel +3 more·Apr 2, 2026
The Quantum Approximate Optimization Algorithm (QAOA) is a leading hybrid heuristic for combinatorial optimization, but efficiently handling hard constraints remains a significant challenge. XY-mixers successfully confine quantum state evolution to a...
Ultrafast Ionization Dynamics Encoded in a Photoelectron Spin Torus
Xiaodan Mao, Feng He, Pei-Lun He·Apr 2, 2026
We demonstrate that strong-field ionization of atoms in circularly polarized laser fields generates a photoelectron spin texture with toroidal topology in momentum space. Using time-dependent Schrödinger equation simulations, spin-resolved classical-...
Towards Chemically Accurate and Scalable Quantum Simulations on IQM Quantum Hardware: A Quantum-HPC Hybrid Approach
Anurag K. S. V., Ashish Kumar Patra, Manas Mukherjee +5 more·Apr 2, 2026
We present a large-scale experimental study of quantum-computing-based molecular simulation carried out on IQM's Sirius 24-qubit superconducting processor, utilizing up to 16 operational qubits. The work employs Sample-based Quantum Diagonalization (...
Efficient generation and explicit dimensionality of Lie group-equivariant and permutation-invariant bases
Eloïse Barthelemy, Geneviève Dusson, Camille Hernandez +1 more·Apr 2, 2026
In this article, we propose a practical construction of Lie group-equivariant and permutation-invariant functions of $N$ variables from the knowledge of a one-particle basis that is stable with respect to the group action. The construction is generic...
Quantum Networking Fundamentals: From Physical Protocols to Network Engineering
Athanasios Gkelias, Felix T. A. Burt, Kin K. Leung·Apr 2, 2026
The realization of the Quantum Internet promises transformative capabilities in secure communication, distributed quantum computing, and high-precision metrology. However, transitioning from laboratory experiments to a scalable, multi-tenant network ...
Collective quantum tunneling with time-dependent generator coordinate method
Wenmin Deng, Guangping Chen, Ganlong Ding +3 more·Apr 2, 2026
Inspired by the work of McGlynn and Simenel [Phys. Rev. C {\bf 102}, 064614 (2020)], this study investigates the quantum tunneling of two interacting distinguishable particles in two potential wells. We first benchmark the system by reproducing key e...
Curvature-induced bound states in quantum wires
Tim Bergmann, Benjamin Schwager, Jamal Berakdar·Apr 2, 2026
A classical particle under spatial constraints is strictly confined to live on a specific space manifold or path, but this assumption is incompatible with the zero-point fluctuations of a quantum particle. One way to describe quantum mechanics under ...
Single-shot measurement learning as a self-certifying estimator for quantum-enhanced sensing
Jeongho Bang·Apr 2, 2026
Single-shot measurement learning (SSML) learns a compensation unitary from a one-bit success/failure record and halts after a prescribed run of consecutive successes. We recast SSML as an adaptive estimator on a parameterized sensing manifold and ask...
Distributed Variational Quantum Linear Solver
Tong Shen, Zeru Zhu, Ji Liu·Apr 1, 2026
This paper develops a distributed variational quantum algorithm for solving large-scale linear equations. For a linear system of the form $Ax=b$, the large square matrix $A$ is partitioned into smaller square block submatrices, each of which is known...
Resource Estimation via Efficient Compilation of Key Quantum Primitives
Colin Campbell, Rich Rines, Victory Omole +6 more·Apr 1, 2026
Resource estimation is a significant challenge in evaluating fault tolerant quantum computers. Existing approaches often rely on either fixed architectural assumptions or coarse analytical models that fail to capture the interaction between hardware ...
High Performance Quantum Emulation for Chemistry Applications with Hyperion
Olivier Adjoua, Siwar Badreddine, César Feniou +4 more·Apr 1, 2026
The strategic demand for quantum hardware currently outpaces the availability of near-term devices, necessitating high-performance software emulators to validate novel protocols. We introduce Hyperion, a massively parallel, GPU-accelerated quantum em...
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...
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...
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 ...
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 ...