Papers
Live trends in quantum computing research, updated daily from arXiv.
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12,429 papers in 12 months (-19% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Robust GHZ State Preparation via Majority-Voted Boundary Measurements
Jean-Baptiste Waring, Sébastien Le Beux, Christophe Pere·Feb 23, 2026
Preparing high-fidelity Greenberger-Horne-Zeilinger (GHZ) states on noisy quantum hardware remains challenging due to cumulative gate errors and decoherence. We introduce Group-Majority-Voting (Group-MV), a dynamic-circuit protocol that partitions ar...
Eigenstate-assisted realization of general quantum controlled unitaries with a fixed cost
Carlos Navas-Merlo, Juan Carlos García-Escartín·Feb 22, 2026
Controlled unitary gates are a basic element in many quantum algorithms. Converting a general unitary $U$ with a known decomposition into its controlled version, controlled-$U$, can introduce a large overhead in terms of the depth of the circuit. We ...
Towards scalable multi-qubit optimal control via interaction decomposition in the diagonal frame
Bora Baran, Tommaso Calarco, Matthias M. Mueller +1 more·Feb 20, 2026
In this work, we introduce a general n-qubit formulation of control objectives that allows a control target to be specified in a diagonal frame, so that only the diagonal entries must be characterized, thus quadratically reducing the complexity of th...
Exact quantum decision diagrams with scaling guarantees for Clifford+$T$ circuits and beyond
Arend-Jan Quist, Tim Coopmans, Alfons Laarman·Feb 19, 2026
A decision diagram (DD) is a graph-like data structure for homomorphic compression of Boolean and pseudo-Boolean functions. Over the past decades, decision diagrams have been successfully applied to verification, linear algebra, stochastic reasoning,...
A Shadow Enhanced Greedy Quantum Eigensolver
Jona Erle, Balint Koczor·Feb 19, 2026
While ground-state preparation is expected to be a primary application of quantum computers, it is also an essential subroutine for many fault-tolerant algorithms. In early fault-tolerant regimes, logical measurements remain costly, motivating adapti...
Phase-sensitive representation of Majorana stabilizer states
Tomislav Begušić, Garnet Kin-Lic Chan·Feb 19, 2026
Stabilizer states hold a special place in quantum information science due to their connection with quantum error correction and quantum circuit simulation. In the context of classical simulations of many-body physics, they are an example of states th...
Single-Photon Motion in a Two-Dimensional Plane: Confinement and Boundary Escape
Hui-hui Miao·Feb 19, 2026
This paper investigates the motion of a single photon in a two-dimensional plane under closed and open boundary conditions. We employ two methods to construct the Hilbert space: Method A, based on the standard second-quantization formalism, and Metho...
Amplification of bosonic interactions through squeezing in the presence of decoherence
Ankit Tiwari, Cecilia Cormick, Christian Arenz·Feb 18, 2026
We consider the amplification of bosonic interactions through parametric control that implements squeezing along orthogonal quadratures. We show that bosonic interactions described by certain classes of quadratic and quartic Hamiltonians can be enhan...
Illustration of Barren Plateaus in Quantum Computing
Gerhard Stenzel, Tobias Rohe, Michael Kölle +3 more·Feb 18, 2026
Variational Quantum Circuits (VQCs) have emerged as a promising paradigm for quantum machine learning in the NISQ era. While parameter sharing in VQCs can reduce the parameter space dimensionality and potentially mitigate the barren plateau phenomeno...
Edge-Local and Qubit-Efficient Quantum Graph Learning for the NISQ Era
Armin Ahmadkhaniha, Jake Doliskani·Feb 17, 2026
Graph neural networks (GNNs) are a powerful framework for learning representations from graph-structured data, but their direct implementation on near-term quantum hardware remains challenging due to circuit depth, multi-qubit interactions, and qubit...
Nonlinear Phase Gates Beyond the Lamb-Dicke Regime
Akram Kasri, Kimin Park, Radim Filip·Feb 17, 2026
Nonlinear phase gates are essential to achieve the universality of continuous-variable quantum processing and its applications. We present a deterministic protocol for generating nonlinear phase gates in trapped ion systems using simultaneous two-ton...
Self-dual Stacked Quantum Low-Density Parity-Check Codes
Ze-Chuan Liu, Chong-Yuan Xu, Yong Xu·Feb 17, 2026
Quantum low-density parity-check (qLDPC) codes are promising candidates for fault-tolerant quantum computation due to their high encoding rates and distances. However, implementing logical operations using qLDPC codes presents significant challenges....
Realizing a Universal Quantum Gate Set via Double-Braiding of SU(2)k Anyon Models
Jiangwei Long, Zihui Liu, Yizhi Li +2 more·Feb 17, 2026
We systematically investigate the implementation of a universal gate set via double-braiding within SU(2)k anyon models. The explicit form of the double elementary braiding matrices (DEBMs) in these models are derived from the F-matrices and R-symbol...
Tensor Decomposition for Non-Clifford Gate Minimization
Kirill Khoruzhii, Patrick Gelß, Sebastian Pokutta·Feb 17, 2026
Fault-tolerant quantum computation requires minimizing non-Clifford gates, whose implementation via magic state distillation dominates the resource costs. While $T$-count minimization is well-studied, dedicated $CCZ$ factories shift the natural targe...
Efficient quantum circuits for high-dimensional representations of SU(n) and Ramanujan quantum expanders
Vishnu Iyer, Siddhartha Jain, Stephen Jordan +1 more·Feb 16, 2026
We present efficient quantum circuits that implement high-dimensional unitary irreducible representations (irreps) of $SU(n)$, where $n \ge 2$ is constant. For dimension $N$ and error $ε$, the number of quantum gates in our circuits is polynomial in ...
Beyond Reinforcement Learning: Fast and Scalable Quantum Circuit Synthesis
Lukas Theißinger, Thore Gerlach, David Berghaus +1 more·Feb 16, 2026
Quantum unitary synthesis addresses the problem of translating abstract quantum algorithms into sequences of hardware-executable quantum gates. Solving this task exactly is infeasible in general due to the exponential growth of the underlying combina...
Scaling QAOA: transferring optimal adiabatic schedules from small-scale to large-scale variational circuits
Ugo Nzongani, Dylan Laplace Mermoud, Arthur Braida·Feb 16, 2026
The Quantum Approximate Optimization Algorithm (QAOA) is a leading approach for combinatorial optimization on near-term quantum devices, yet its scalability is limited by the difficulty of optimizing \(2p\) variational parameters for a large number \...
Scalable Multi-Robot Path Planning via Quadratic Unconstrained Binary Optimization
Javier González Villasmil·Feb 16, 2026
Multi-Agent Path Finding (MAPF) remains a fundamental challenge in robotics, where classical centralized approaches exhibit exponential growth in joint-state complexity as the number of agents increases. This paper investigates Quadratic Unconstraine...
The Signal Horizon: Local Blindness and the Contraction of Pauli-Weight Spectra in Noisy Quantum Encodings
Ait Haddou Marwan·Feb 16, 2026
The performance of quantum classifiers is typically analyzed through global state distinguishability or the trainability of variational models. This study investigates how much class information remains accessible under locality-constrained measureme...
Geometry of Quantum Logic Gates
M. W. AlMasri·Feb 16, 2026
In this work, we investigate the geometry of quantum logic gates within the holomorphic representation of quantum mechanics. We begin by embedding the physical qubit subspace into the space of holomorphic functions that are homogeneous of degree one ...