Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Dynamic Entanglement Distribution for Multi-User and Multi-Protocol Quantum Networking
Rui Wang, Marcus J. Clark, Obada Alia +8 more·Jul 16, 2026
Dynamic entanglement distribution is a key requirement for scalable, multi-user and multi-protocol quantum networks. We demonstrate a metropolitan-scale entanglement-based quantum communication network enabled by a quantum reconfigurable optical add-...
Coulomb blockade in microscopic material defects as a source of decoherence and noise in solid-state quantum circuits
R. Banerjee, L. P. Lindoy, M. Hegedus +9 more·Jul 16, 2026
A critical limitation of solid-state quantum devices arises from the materials from which they are fabricated: uncontrolled surfaces, interfaces, and structural imperfections introduce numerous sources of loss and decoherence. Despite extensive effor...
Stochastic binary networks with asymmetric and time-delayed interactions
Hantao Zhang, Sidra Gibeault, Matthew W. Daniels +4 more·Jul 16, 2026
Stochastic binary networks are widely used to describe collective dynamics in complex systems and to perform neuromorphic computation, yet realistic networks often contain both asymmetric interactions and finite signal propagation times that fall out...
Counterexamples to additivity of minimum output $p$-Rényi entropy of quantum channels for $p>3/4$ and $0\leq p<1/4$
Debbie Leung, Benjamin Lovitz, Peixue Wu·Jul 16, 2026
Additivity of minimum output entropies is a central problem in quantum information theory. Nonadditivity is known for every Rényi order $p>1$, at the von Neumann point $p=1$, and near $p=0$, while most of the interval $0<p<1$ has remained open. We pr...
Entanglement Detection for Two-Qubit and Three-Qubit Pure States via Unitary Transformations and Ancilla State Measurements
Yu-Hang Liu, Yuan-Hong Tao, Yi-Wen Liu +2 more·Jul 16, 2026
Quantum entanglement is the fundamental hallmark of quantum mechanics and a core resource for realizing long-distance quantum communication and scalable linear quantum computing. Accordingly, the precise detection and quantitative quantification of e...
Backpropagating Pauli Propagation
Sheng-Hsuan Lin, Etienne Granet, Kevin Hémery +1 more·Jul 16, 2026
We develop a backpropagation algorithm for evaluating parameter gradients in quantum circuits using Pauli propagation simulation. The method has computational complexity comparable to that of standard sparse Pauli simulation techniques, while produci...
Driven-dissipative superconductivity in moiré heterostructure without attraction
Tsung-Sheng Huang, Atac Imamoglu, Mohammad Hafezi +1 more·Jul 16, 2026
Dissipative preparation of quantum order offers a route to superconductivity that does not rely on enhancing attractive interactions. Here we propose a driven-dissipative protocol to prepare superconductivity as a stationary state of a two-dimensiona...
Parameter-Shift Rules for Gradients in Boson Sampling Experiments
Marius Trudeau, Pierre-Emmanuel Emeriau, Nicolás Quesada·Jul 16, 2026
Using a robust photon loss model for photonic quantum experiments, we derive $n-$th order parameter-shift rules for computing gradients of Fock boson sampling transition probabilities where $n$ photons are sent into a lossy interferometer. We also sh...
LDGM-Based Quantum Codes for Fault-Tolerant Quantum Computation
Yumin Li, Kejing Liu, Hanqing Lou +1 more·Jul 16, 2026
We construct a new family of Calderbank-Shor-Steane (CSS) codes using the generator and parity-check matrices of Low-Density Generator Matrix (LDGM) codes, with row operations applied to both matrices in order to achieve the desired quantum rate. Dec...
Fast two-dimensional tensor-network contraction via subspace iteration
Yining Zhang, Philippe Corboz·Jul 16, 2026
The corner transfer matrix renormalization group (CTMRG) is one of the standard contraction methods for infinite projected entangled-pair states (iPEPS), but its computational cost is dominated by repeated truncated singular value decompositions (SVD...
Superadditivity for Entanglement-Assisted Communication
Hao-Chung Cheng, Mario Berta·Jul 16, 2026
The entanglement-assisted capacity of a quantum channel admits an additive single-letter characterization, implying that joint encodings across channel uses cannot increase the ultimate communication rate. Here, we show that this additive picture doe...
Periodic orbits and quantum many-body scars in integrable spin chains
Elena Petrova, Maksym Serbyn, Marko Ljubotina·Jul 16, 2026
Quantum many-body scars provide an exception to generic thermalising dynamics, but their relation to integrability remains unclear. Here we apply the periodic-orbit framework to the integrable XYZ/XXZ spin-1/2 chain, developing an energy-resolved app...
On the origin of finite entanglement scaling
Luke Hodgkiss, Laurens Lootens, Atsushi Ueda +2 more·Jul 16, 2026
The concept of finite entanglement scaling forms one of the pillars on which the tensor network ecosystem is built. In this paper, we resolve the open problem of determining the actual perturbations induced by matrix product state approximations of c...
Quantum Lock-In Detection via Successive Adiabatic Evolution
Kangze Li, Siqi Chen, Hao Zhang +3 more·Jul 16, 2026
In recent years, quantum lock-in detection has emerged as a promising technique to accurately detect weak signals submerged in background noise. However, the signal-to-noise ratio of existing protocols is severely limited by spectral leakage resultin...
A magnetic monopole in a superfluid bubble
Marianna Sorba, Andrea Richaud·Jul 16, 2026
Magnetic monopoles lie at the crossroads of gauge fields, topology, geometric phases, and charge quantization, yet they remain elusive as fundamental particles. Here we show that an emergent Dirac-monopole framework arises naturally from the dynamics...
An experimental pathway towards an exact theory of strong coupling
Eugenia Pyurbeeva, Ronnie Kosloff·Jul 16, 2026
We employ a mathematically equivalent form of the GKLS master equation to arrive at an exact theoretical description of a two-level system strongly coupled to the environment. The framework, while intuitive, shedding light on the physics of the probl...
Residual-Based Time Discretization on Nonlinear Approximation Manifolds: Analysis and Gaussian Applications
Eddy de Leon, Caroline Lasser·Jul 16, 2026
We study time-discrete parametric approximations of evolution equations in Hilbert spaces based on residual minimization. The solution is represented by a parametrized ansatz belonging to a low-dimensional nonlinear manifold, and time stepping is per...
SQD-Enabled Circuit Compression for Resource-Efficient Quantum Chemistry
Kangyu Zheng, Yidong Zhou, Jinglei Cheng +3 more·Jul 16, 2026
Subspace Quantum Diagonalization (SQD) recovers ground-state energies by classically diagonalizing a Hamiltonian in the subspace spanned by quantum samples, requiring only bitstrings with sufficient ground-state overlap rather than an accurate variat...
Casimir effect for a massive scalar field confined between parallel plates with a spatially varying effective mass
R. L. Araújo Xavier, M. H. B. Chaves, E. R. Bezerra de Mello +1 more·Jul 16, 2026
We investigate the Casimir effect for a massive real scalar field confined between two perfectly reflecting parallel plates in the presence of a position-dependent effective mass, a mechanism for coupling a scalar background to a scalar field. Exact ...
Towards logical entanglement creation in trivalent planar architectures
Lukas Bödeker, Luis Colmenarez, Sergey Blinov +3 more·Jul 16, 2026
Low-overhead quantum error-correction schemes are essential for enabling quantum computation on registers containing multiple logical qubits. For planar architectures with limited nearest-neighbor qubit connectivity, the surface code has emerged as t...