Papers
Live trends in quantum computing research, updated daily from arXiv.
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Separate Control of Transient Leakage Exposure and Endpoint Leakage in Fast Transmon Gates
Haoran Yang, Fudong Liu, Weilong Wang +2 more·Jul 7, 2026
Leakage to noncomputational states limits the speed of single-qubit gates in weakly anharmonic transmons. Conventional pulse-shaping methods, including derivative removal by adiabatic gate (DRAG), primarily suppress the leakage remaining at the end o...
Many-body quantum optics in a cascaded chiral network
Frank Yang, Parth S. Shah, Chaitali Joshi +1 more·Jul 7, 2026
Chiral quantum emitters interact with light only in one propagation direction, allowing them to be linked into cascaded systems in which photons mediate ordered, long-range interactions. Such systems are predicted to host novel regimes of many-body p...
Enhanced phase estimation with coherently boosted two-mode squeezed beams and its application to optical gyroscopes
Xiao-Qi Xiao, Elisha S. Matekole, Jiankang Zhao +3 more·Jul 7, 2026
Quantum techniques, developed in recent decades, provide new approaches to achieving high-precision measurements beyond the classical bounds. In this paper, we theoretically demonstrate a metrology method for improving the sensitivity of the interfer...
Low-Overhead Error-Corrected QCNNs Using Bivariate Bicycle Codes
Alejandro Rosales, Animesh Yadav·Jul 7, 2026
Quantum convolutional neural networks (QCNNs) combine the power of quantum computing and classical CNN for computational speedup in classification tasks. However, noise levels on state-of-the-art quantum devices remain too high for practical QCNN exe...
Entangled quantum clocks as operational probes of spacetime curvature
Ivana Đorđević, Aleksandra Gočanin, Dragoljub Gočanin·Jul 7, 2026
Building on the framework developed by Perche [Phys. Rev. D 106, 025018 (2022)], we study two localized nonrelativistic quantum particles propagating along timelike geodesics in a curved spacetime background. Each particle is coupled to a quantum clo...
Free Multiplicative Convolution and Erlang Moments in Monitored Quantum Transport
Joon Hyung Lee·Jul 6, 2026
We study the transmission eigenvalues of monitored Haar products \[ B_L=(PS_L)(PS_{L-1})\cdots(PS_1), \] where the $S_i$ are independent Haar unitaries and $P$ is a deterministic projection. For fixed $L$, we prove that the empirical eigenvalue distr...
Interplay Between Quantum Coherence and Multiparameter Quantum Estimation in Graphene
Younes Moqine, Brahim Adnane, Abdelilah El Rhazali +1 more·Jul 6, 2026
In this work, we investigate the relationship between quantum coherence and multiparameter quantum estimation in a graphene-based system. We focus on the estimation of two relevant physical parameters, namely the temperature $T$ and the wave vector $...
Verifiable blind quantum computing: Comparative analysis and design considerations for client architectures
Janice van Dam, Jeroen Grimbergen, Stephanie D. C. Wehner·Jul 6, 2026
Blind quantum computing (BQC) allows a client to delegate quantum computations to a remote server without revealing the input, computation, or output. In addition to being blind, the client can sometimes also verify that the server has performed thei...
Coherent Control of Channel Dilations Activate Temporal Bell Nonclassicality
H S Karthik, Akshata Shenoy H, A R Usha Devi +1 more·Jul 6, 2026
The temporal Clauser-Horne-Shimony-Holt (CHSH) inequality witnesses the nonclassicality of temporal correlations, but its violation is generally degraded by environmental noise. Here, we show that violation of the temporal CHSH inequality can be revi...
Towards Quantum Network Performance Metrics: Challenges and Demonstration
Mohamed Shaban, Mariam Kiran, Muhammad Ismail·Jul 6, 2026
As quantum networks move toward practical deployment, standardized performance monitoring becomes essential. This article proposes a structured monitoring framework for quantum networks with performance metrics, including quality (e.g., entanglement ...
Spin-1 teleportation-based quantum state tomography
Gustavo Rigolin·Jul 6, 2026
We show that the teleportation-based quantum state tomography (QST) protocol, originally built to reconstruct qubits (spin-1/2 systems), can be extended to deal with qutrits (spin-1 systems) as well. Similarly to the original proposal, only two resou...
Contractivity of the Hilbert--Schmidt Speed and Unitality--Divisibility-Based Witnesses in Finite-Dimensional Quantum Dynamics
Hossein Rangani Jahromi·Jul 6, 2026
We investigate the Hilbert--Schmidt speed as a witness of non-Markovianity in finite-dimensional quantum dynamics. For a differentiable one-parameter family of quantum states, the Hilbert--Schmidt speed is defined, up to a conventional factor, as the...
Entanglement Entropy of Free Fermions on Random Fractal Lattices
Arkadiusz Kosior, Jia Wang·Jul 6, 2026
Random fractal lattices provide a geometrically disordered setting in which quantum correlations can be shaped by noninteger dimensionality rather than onsite randomness. We investigate the entanglement properties of noninteracting fermions on random...
Wilczek-Zee Realization of Uhlmann Parallel Transport
Yu-Huan Huang, Xu-Yang Hou, Jia-Chen Tang +1 more·Jul 6, 2026
The Uhlmann phase extends geometric phases to mixed quantum states via a parallel-transport condition on purification amplitudes, yet its direct implementation under standard Hamiltonian dynamics is obstructed by the non-Hermitian nature of the purif...
Nonlocal transfer of quantized toroidal magnetic flux
Adel Ali, Alexey Belyanin·Jul 6, 2026
We propose a nonlocal flux-transfer experiment in which a quantized magnetic-field excitation confined within one toroidal superconducting structure is coherently transferred to a spatially separated toroid without magnetic-field occupation of the in...
Reduced Quantum-Reference-Frame Channels for Open Quantum Systems
Paolo Luppi, Viktoria Kabel, Flaminia Giacomini +1 more·Jul 6, 2026
When reference frames are treated quantum mechanically, the subsystem structure of quantum systems is no longer absolute, but depends on the choice of the quantum reference frame (QRF). This raises a basic question: which dynamical properties are pre...
Low-depth simulation of non-Markovianity under quantum hardware noise
Diana A. Chisholm·Jul 6, 2026
Simulating open quantum systems on digital quantum computers typically relies on the use of auxiliary qubits, resulting in overheads of noisy multi-qubit gates, that severely limit execution on near-term hardware. In this work, we explore the simulat...
Higher-dimensional chaotic features and random matrix signatures following a local quench
Dmitry S. Ageev, Jacob Sonnenschein·Jul 6, 2026
We study the multidimensional erratic structure of correlation functions produced by local operator quenches in finite-volume free massive scalar field theory in dimensions 2 and 3. The basic observable is the subtracted equal-time two-point function...
Anomalous suppression of quantum chaos between two integrable limits
Roopayan Ghosh, Henry Davenport, Frank Schindler·Jul 6, 2026
Level statistics in non-integrable quantum many-body systems with time reversal symmetry are expected to follow the Gaussian Orthogonal Ensemble (GOE), a hallmark of quantum chaos. However, we show that the interacting Su-Schrieffer-Heeger model exhi...
Towards Lattice Surgery Compilation for the Color Code Using Pipe Diagrams
Laura S. Herzog, Gilad Kishony, Robert Wille +1 more·Jul 6, 2026
Pipe diagrams have emerged as a powerful framework for flexible lattice surgery compilation and spacetime optimization for the surface code. In contrast, analogous compilation techniques for color code architectures remain largely unexplored, despite...