Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Qubit discretizations of d=3 conformal field theories
Hansen S. Wu, Ribhu K. Kaul·Mar 8, 2026
We propose that scaling dimensions of d=3 conformal field theories can be studied on a system of qubits with near term quantum simulation platforms. Our proposal chooses couplings of quantum many-body problems on a polyhedral lattice at which the con...
Complexity Bounds for Hamiltonian Simulation in Unitary Representations
Naihuan Jing, Molena Nguyen·Mar 7, 2026
For any unitary representation $ρ$ on a finite-dimensional Hilbert space \(V\) with differential \(dρ: \mathfrak{g} \to \mathfrak{u}(V)\) for the Lie algebra $\mathfrak g$, we consider the Hamiltonian evolution \[ U_X(t) \coloneqq ρ(\exp(tX)) = e^{t\...
For molecular polaritons, disorder and phonon timescales control the activation of dark states in the thermodynamic limit
Tianchu Li, Pranay Venkatesh, Qiang Shi +1 more·Mar 6, 2026
Collective light-matter systems host an extensive manifold of dark states whose role in the emergence of thermodynamic behavior remains poorly understood, especially in the presence of disorder and structured environments. Here, we develop a hybrid m...
Efficient construction of time-invariant process tensors for simulating high-dimensional non-Markovian open quantum systems
Émile Cochin, Jonathan Keeling, Brendon W. Lovett +1 more·Mar 6, 2026
Numerical methods for obtaining exact dynamics of non-Markovian open quantum systems are mostly limited to either small systems or to short-time evolution only. Here, we propose a new algorithm for computing process tensors--matrix product operator (...
Hybrid quantum-classical simulations of semiclassical gravity
Carlos Fulgado-Claudio, Daniel González-Cuadra, Jose Beltrán Jiménez +1 more·Mar 6, 2026
We propose a hybrid quantum-classical algorithm for the simulation of real-time dynamics in interacting quantum field theories coupled to classical fields, focusing on the self-consistent estimation of semiclassical backreaction. By discretizing spac...
Unifying Graph Measures and Stabilizer Decompositions for the Classical Simulation of Quantum Circuits
Julien Codsi, Tuomas Laakkonen·Mar 6, 2026
Various algorithms have been developed to simulate quantum circuits on classical hardware. Among the most prominent are approaches based on \emph{stabilizer decompositions} and \emph{tensor network contraction}. In this work, we present a unified fra...
A Scheduler for the Active Volume Architecture
Sam Heavey, Athena Caesura·Mar 6, 2026
We improve the accuracy of Active Volume resource estimates by explicitly scheduling when Active Volume blocks execute. We present software that uses a greedy strategy to assign each logical qubit a role in each logical cycle (e.g., workspace, stale ...
Efficient Classical Simulation of Low-Rank-Width Quantum Circuits Using ZX-Calculus
Fedor Kuyanov, Aleks Kissinger·Mar 6, 2026
In this paper, we introduce a technique for contracting (i.e. numerically evaluating) ZX-diagrams whose complexity scales with their rank-width, a graph parameter that behaves nicely under ZX rewrite rules. Given a rank-decomposition of width $R$, ou...
Belief-Adaptive MAP Detection for Molecular ISI Channels with Heteroscedastic Noise
Erencem Ozbey, H. Birkan Yilmaz, Chan-Byoung Chae·Mar 6, 2026
Inter-symbol interference (ISI) with heteroscedastic, or state-dependent, noise is a defining feature of molecular communication via diffusion (MCvD). However, such noise variance dependency across ISI states has not been systematically considered in...
The stabilizer ground state and applications to quantum simulation
Yuping Mao, Chang Chen, Jiaxing Feng +2 more·Mar 6, 2026
The stabilizer ground state is defined is the lowest energy stabilizer state with respect to a given Hamiltonian. In many cases it is highly degenerate and does not give a unique stabilizer state. We define the optimal stabilizer ground state as the ...
Variational Quantum Operator Simulation
Satoru Shoji, Kosuke Ito, Yukihiro Shimizu +1 more·Mar 6, 2026
Implementing time-evolution operators in shallow quantum circuits is important for quantum simulations. The standard method of Trotterization requires a large number of gates to achieve practical accuracy. Variational Quantum Simulation (VQS) is an a...
Matchgate circuit representation of fermionic Gaussian states: optimal preparation, approximation, and classical simulation
Marc Langer, Raúl Morral-Yepes, Adam Gammon-Smith +2 more·Mar 5, 2026
Fermionic Gaussian states (FGSs) and the associated matchgate circuits play a central role in quantum information theory and condensed matter physics. Despite being possibly highly entangled, they can still be efficiently simulated on classical compu...
Hamiltonian Lattice QED$_3$ with One and Two Flavors of Wilson Fermions: Topological Structure and Response
Sriram Bharadwaj, Emil Rosanowski, Simran Singh +5 more·Mar 5, 2026
The quantum simulation of topological phases in (2+1)D quantum electrodynamics with Wilson fermions provides a promising route toward realizing topological phenomena in near-term lattice experiments. We show that the commonly used staggered-fermion d...
Core-bound waves on a Gross-Pitaevskii vortex
Evan Papoutsis, Nathan Apfel, Nir Navon·Mar 5, 2026
We find the dispersion relations of two elusive families of core-bound excitations of the Gross-Pitaevskii (GP) vortex, varicose (axisymmetric) and fluting (quadrupole) waves. For wavelengths of order the healing length, these two families -- and the...
Ansatz-Free Learning of Lindbladian Dynamics In Situ
Petr Ivashkov, Nikita Romanov, Weiyuan Gong +3 more·Mar 5, 2026
Characterizing the dynamics of open quantum systems at the level of microscopic interactions and error mechanisms is essential for calibrating quantum hardware, designing robust simulation protocols, and developing tailored error-correction methods. ...
Spin-resolved microscopy of $^{87}$Sr SU($N$) Fermi-Hubbard systems
Carlos Gas-Ferrer, Antonio Rubio-Abadal, Sandra Buob +3 more·Mar 5, 2026
Quantum-gas microscopes provide direct access to the phases of the Hubbard model, bringing microscopic insight into the complex competition between interactions, SU(2) magnetism, and doping. Alkaline-earth(-like) fermions extend this spin-1/2 paradig...
Quantum Simulation of Coupled Harmonic Oscillators: From Theory to Implementation
Viraj Dsouza, Weronika Golletz, Dimitrios Kranas +3 more·Mar 5, 2026
We investigate the quantum algorithm of Babbush et al. (arXiv:2303.13012v3) for simulating coupled harmonic oscillators, which promises exponential speedups over classical methods. Focusing on linearly connected oscillator chains, we bridge the gap b...
Spatiotemporal Pauli processes: Quantum combs for modelling correlated noise in quantum error correction
John F Kam, Angus Southwell, Spiro Gicev +2 more·Mar 5, 2026
Correlated noise is a critical failure mode in quantum error correction (QEC), as temporal memory and spatial structure concentrate faults into error bursts that undermine standard threshold assumptions. Yet, a fundamental gap persists between the st...
MQED-QD: An Open-Source Package for Quantum Dynamics Simulation in Complex Dielectric Environments
Guangming Liu, Siwei Wang, Hsing-Ta Chen·Mar 5, 2026
Simulating the dynamics of molecular excitons in complex nanophotonic environments requires integrating rigorous electromagnetic simulations with accurate treatments of open quantum system dynamics. In this work, we develop MQED-QD (Macroscopic Quant...
Constant-Depth Quantum Imaginary Time Evolution Using Dynamic Fan-out Circuits
Albert Lund, Erika Magnusson, Werner Dobrautz +1 more·Mar 5, 2026
Dynamic quantum circuits combine mid-circuit measurement with classical feed-forward, enabling circuit constructions with reduced entangling-gate depth. Here, we investigate their use in Quantum Imaginary Time Evolution (QITE), where circuit depth an...