Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
BPBO: Blindness-Preserving Brickwork Optimization by Certified Region Resynthesis
Youngkyung Lee, Juyoung Kim, Doyoung Chung·Jun 29, 2026
Universal blind quantum computation (UBQC) hides a client's computation by using a computation-independent BFK09 brickwork graph and encoding the computation in measurement angles, which limits the use of graph-changing optimizations. We study blindn...
Soft-Radiation-Induced Decoherence of Heavy-Quark Spin Entanglement at the Electron-Ion Collider
Sanskriti Agrawal, Muneeb Zahoor, Raktim Abir·Jun 29, 2026
Using the soft-gluon theorem, we identify a soft-recoil mechanism by which unresolved gluon radiation induces decoherence in the spin correlations of heavy quark-antiquark pairs produced in deep-inelastic scattering. We show the eikonal soft contribu...
Finite-key security analysis of decoy-state QKD with source and detector imperfections
Xoel Sixto, Guillermo Currás-Lorenzo, Margarida Pereira +3 more·Jun 29, 2026
Decoy-state quantum key distribution (QKD) is the most widely adopted approach for overcoming the limitations of imperfect single-photon sources. However, existing security proofs typically either neglect important device imperfections or rely on ass...
Preparation-Space Diagnostics and Logical Information Loss in a Driven Kerr-Cat Qubit
Stephen Wiggins·Jun 29, 2026
A Kerr-cat qubit encodes a logical bit in the two wells of a parametrically driven nonlinear oscillator, and a logic gate is a transient change of the drive. In the phase plane the gate deforms the double well and can split its separatrix into a turn...
Nonperturbative Leakage Elimination Operator-Based Quantum Control Pulse Design Beyond the High Frequency Driving Regime
Hang Yu, Kai-Yu Yuan, Feng-Hua Ren +1 more·Jun 29, 2026
Precise quantum pulse design is central to achieving high precision quantum control, while level leakage induced by system environment coupling is the bottleneck limiting control precision. The leakage elimination operator (LEO) approach is highly ef...
Quantum Eigenvalue Transformation via Linear Combination of Hamiltonian Simulation: A Weyl Calculus Approach
Hongkang Ni, Lexing Ying·Jun 29, 2026
Linear combination of Hamiltonian simulation (LCHS) provides an efficient method for implementing matrix exponentials $e^{-tA}$ on quantum computers. In this paper, we develop LCHS formulas for computing general matrix functions $f(A)$ when $f$ is an...
Spin-1 Dirac dispersion and Chern insulating phases in 2D honeycomb Sierpiński fractal
Shneha Biswas, Shouya Yoshida, Katsunori Wakabayashi +1 more·Jun 29, 2026
Graphene-based Sierpiński fractals host a zero-energy chiral mode and spin-1 Dirac dispersions within the nearest-neighbor tight-binding model. However, the presence of complex next-nearest neighbor hopping arising from the local flux and the stagger...
Infrared Safety from ZX-Diagrams: A Categorical Proof of Soft-QED as Open Quantum System
Soo-Jong Rey·Jun 29, 2026
The discard ZX-calculus, a diagrammatic language for mixed-state quantum mechanics, is used to give a nonperturbative, categorical proof of the Bloch-Nordsieck cancellation of infrared divergences in QED. Soft photons are treated as an open quantum s...
Nonlocal effects via Local Quantum Fisher Information: Characterizations and Interpretations
R. Muthuganesan·Jun 29, 2026
We introduce a quantum Fisher information based measurement-induced nonlocality (QFI-MIN), which quantifies the maximal statistical distinguishability induced by locally invariant unitary dynamics. The proposed measure inherits desirable properties i...
Multipartite quantum resource distillation through local measurement programs
Yan Wang, Shao-Qi Lin, Xi-Nuo Tao +6 more·Jun 29, 2026
Distributed quantum resources in practical multi-user quantum networks are inevitably degraded by environmental noise, channel loss, and device-induced imperfections. To address these issues, quantum resource distillation offers a fundamental approac...
Krylov Complexity in Non-Inertial Quantum Systems
Ming-Qi Ma, Shi-Cheng Liu, Lei-Hua Liu +1 more·Jun 29, 2026
In this work, we formulate the Krylov complexity in non-In an inertial quantum system, the direct emergence of the $SU(1,1)$ sector from the Klein-Gordon symplectic form dictates that the Rindler pair-number sector naturally forms the Krylov basis fo...
Quantum Circuit Realization of the PPT and CCNR Criteria
Jihui Mo, Yuanhong Tao·Jun 29, 2026
The efficient detection of quantum entanglement is a central problem in quantum information processing. This paper systematically proposes a quantum circuit implementation scheme based on the Positive Partial Transpose (PPT) and the Computable Cross-...
Coherent manipulation of the biphoton generation in cavity-QED system
Jia-Ni Yang, Xin-Yi Ling, Yuan Feng +2 more·Jun 29, 2026
We theoretically investigate the coherent manipulation of biphoton generation via spontaneous four-wave mixing in a cavity-QED system with a single atom. The atom is driven by pumping, coupling, and driving fields, and the generation of the Stokes an...
Unbiased Hamiltonian Simulation by Reversing Trotter Error Dynamics
Keisuke Murota, Yuta Kikuchi, Enrico Rinaldi +2 more·Jun 29, 2026
Owing to their simplicity and low overhead, Suzuki--Trotter formulas remain the de facto Hamiltonian simulation methods on current quantum computing platforms. Systematic Trotter errors, however, will quickly become limiting when scaling to larger pr...
Quantum complexity resource in Gaussian boson sampling: Core structure of the semidefinite program
Kunwar Kalra, Vitaly Kocharovsky·Jun 29, 2026
We present a rigorous analysis of the algebraic and geometric structure of the quantum complexity resource of a system of bosonic modes in Gaussian boson sampling. This resource underlies the quantum advantage of the system: its photon-counting stati...
Alleviating the Sparse Matrix Scaling Bottleneck in Adaptive VQE via High-Order Taylor State Evolution
Hermawan Kresno Dipojono·Jun 29, 2026
The Variational Quantum Eigensolver (VQE) is a leading algorithm for noisy intermediate-scale quantum (NISQ) devices, but its adaptive variants (e.g., ADAPT-VQE) suffer from severe classical simulation bottlenecks during the ansatz growth phase. Repr...
A Machine-Verified Proof of a Quantum-Optimization Conjecture
Uri Kol, Maor Ben-Shahar, Kfir Sulimany +1 more·Jun 29, 2026
We report a machine-verified resolution of a problem open for over a decade in quantum optimization: the Farhi, Goldstone and Gutmann (FGG) conjecture that depth-$p$ Quantum Approximate Optimization Algorithm (QAOA) on the ring of disagrees attains a...
Hybrid Quantum Neighborhood Selection: NISQ-Compatible Combinatorial Optimization via Stochastic Frontier Decomposition
Nicolas Mendes de Araujo, Lester de Abreu Faria·Jun 28, 2026
Large-scale combinatorial optimization is a challenge for near-term quantum computing because dense Quadratic Unconstrained Binary Optimization (QUBO) formulations yield interaction graphs that exceed the limits of NISQ processors. This work introduc...
Characterization of Unlearnable Noise with Mid-Circuit-Measurement-Based Cycle Benchmarking
M. H. Cheng, Stefano Mangini, V. Bartsch +4 more·Jun 28, 2026
Noise characterization of multi-qubit entangling Clifford operations is a key practical bottleneck for quantum error mitigation and for the calibration, validation, and optimization of quantum error-correction protocols, especially in the presence of...
Lie Group Diffusion Models for Hardware-Aware Quantum Circuit Synthesis
Jyotirmai Singh·Jun 28, 2026
An important task in quantum computing is unitary circuit synthesis compatible with physical hardware constraints. This problem has a natural hybrid structure as local single-qubit gates are continuous variables on the Lie group $SU(2)$ while the ent...