Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Efficient state estimation on quantum processors
Victor Gonzalez Avella, Abraham Vega Vargas, Tomas Merlo Vergara +6 more·Oct 17, 2025
We present two scalable and entanglement-free methods for estimating the collective state of an n-qubit quantum computer. The first method consists of a fixed set of five quantum circuits-regardless of the number of qubits-that avoid the use of entan...
Out-of-Equilibrium Dynamics in a U(1) Lattice Gauge Theory via Local Information Flows: Scattering and String Breaking
Claudia Artiaco, João Barata, Enrique Rico·Oct 17, 2025
We introduce local information flows as a diagnostic tool for characterizing out-of-equilibrium quantum dynamics in lattice gauge theories. We employ the information lattice framework, a local decomposition of total information into spatial- and scal...
Artificial Transmission Line Synthesis Tailored for Traveling-Wave Parametric Processes
M. Malnou·Oct 17, 2025
Artificial transmission lines built with lumped-element inductors and capacitors form the backbone of broadband, nearly quantum-limited traveling-wave parametric amplifiers (TWPAs). When tailoring these transmission lines for parametric processes, no...
Spectral statistics and energy-gap scaling in $k-$local spin Hamiltonians
Sasanka Dowarah·Oct 17, 2025
We investigate the spectral properties of all-to-all interacting spin Hamiltonians acting on exactly $k$ spins, whose coupling coefficients are drawn from a normal distribution with mean $μ$ and variance $σ^2$. For $μ= 0$, we demonstrate that the ran...
Operator Commutativity Screening and Progressive Operator Block Reordering toward Many-body Inspired Quantum State Preparation
Dibyendu Mondal, Debaarjun Mukherjee, Rahul Maitra·Oct 17, 2025
In the field of quantum chemistry, the variational quantum eigensolver (VQE) has emerged as a highly promising approach to determine molecular energies and properties within the noisy intermediate-scale quantum (NISQ) era. The central challenges of t...
Role of exceptional points in the dynamics of the Lindblad Sachdev-Ye-Kitaev model
Jie-ping Zheng, Jorge Dukelsky, Rafael A. Molina +1 more·Oct 17, 2025
The out of equilibrium dynamics of the Sachdev-Ye-Kitaev model (SYK), comprising $N$ Majoranas with random all-to-all four-body interactions, minimally coupled to a Markovian bath modeled by the Lindblad formalism, displays intriguing nontrivial feat...
Adaptive time Compressed QITE (ACQ) and its geometrical interpretation
Alberto Acevedo Meléndez, Carmen G. Almudéver, Miguel Angel Garcia-March +8 more·Oct 17, 2025
Imaginary Time Evolution (QITE) approximates this evolution on quantum hardware but suffers from high circuit depth and numerous measurements. In this work we introduce Adaptive-time Compressed QITE (ACQ), a novel algorithm that reduces resource-cost...
Flexible Qubit Allocation of Network Resource States
Francesco Mazza, Jorge Miguel-Ramiro, Jessica Illiano +4 more·Oct 17, 2025
The Quantum Internet is still in its infancy, yet identifying scalable and resilient quantum network resource states is an essential task for realizing it. We explore the use of graph states with flexible, non-trivial qubit-to-node assignments. This ...
Hybrid Path-Transverse Electric Mode Qudit Encoding on an Integrated Photonic Chip
Imogen Forbes, Patrick Yard, Martin Bielak +5 more·Oct 17, 2025
Hybrid encodings, where multiple degrees of freedom are used to encode quantum information, can increase the size of the Hilbert space with minimal increase to hardware requirements. We show a reprogrammable integrated photonic device, with multimoda...
Subdimensional Entanglement Entropy: From Geometric-Topological Response to Mixed-State Holography
Meng-Yuan Li, Peng Ye·Oct 17, 2025
We introduce the subdimensional entanglement entropy (SEE), defined on subdimensional entanglement subsystems (SESs) embedded in the bulk, as an entanglement-based probe of how geometry and topology jointly shape universal properties of quantum matte...
A source of heralded atom-photon entanglement for quantum networking
Gianvito Chiarella, Tobias Frank, Leart Zuka +2 more·Oct 17, 2025
Communication in quantum networks suffers notoriously from photon loss. Resulting errors can be mitigated with a suitable measurement herald at the receiving node. However, waiting for a herald and communicating the measurement result back to the sen...
A Gauss-Bonnet Theorem for Quantum States: Gauss Curvature and Topology in the Projective Hilbert Space
Shin-Ming Huang·Oct 17, 2025
Geometry and topology are fundamental to modern condensed matter physics, but their precise connection in quantum systems remains incompletely understood. Here, we develop an analytical scheme for calculating the curvature of the quantum metric of Bl...
Scalar fields with power-law potentials in quantum cosmology
V. E. Kuzmichev, V. V. Kuzmichev·Oct 17, 2025
A homogeneous and isotropic quantum cosmological system (universe) initially filled with a uniform scalar field that has a potential in the power law representation is considered. Depending on the epoch, this scalar field yields barotropic matter in ...
Emergence of irreversible decoherence from unitary dynamics
Ri-Hua Zheng, Jia-Hao Lü, Fan Wu +4 more·Oct 17, 2025
The decoherence of superpositions of classically distinguishable states (cat states) is crucial for understanding quantum-to-classical transitions and quantum measurements. So far, decoherence processes of mesoscopic cat states have been demonstrated...
The Geometry of Qubit Decoherence: Linear vs. Nonlinear Dynamics in the Bloch Ball
Alan C. Maioli, Evaldo M. F. Curado, Jean-Pierre Gazeau +1 more·Oct 17, 2025
We present two complementary approaches to the GKSL equation for an open qubit. The first, based on linearity, yields solutions illustrated by mixed states trajectories in the Bloch ball, including non-random asymptotic fixed points, and exceptional ...
Optomechanical crystal in light-resilient quantum ground state
Johan Kolvik, Paul Burger, David Hambraeus +4 more·Oct 17, 2025
Interaction between light and high-frequency sound is a key area in integrated photonics, quantum and nonlinear optics, and quantum science. However, the typical suspended optomechanical structures suffer from poor thermal anchoring, making them susc...
Quantum Worst-Case to Average-Case Reduction for Matrix-Vector Multiplication
Divesh Aggarwal, Dexter Kwan·Oct 17, 2025
Worst-case to average-case reductions are a cornerstone of complexity theory, providing a bridge between worst-case hardness and average-case computational difficulty. While recent works have demonstrated such reductions for fundamental problems usin...
Near-Equilibrium Propagation training in nonlinear wave systems
Karol Sajnok, Michał Matuszewski·Oct 17, 2025
Backpropagation learning algorithm, the workhorse of modern artificial intelligence, is notoriously difficult to implement in physical neural networks. Equilibrium Propagation (EP) is an alternative with comparable efficiency and strong potential for...
Globalizing the Carleman linear embedding method for nonlinear dynamics
Ivan Novikau, Ilon Joseph·Oct 17, 2025
The Carleman embedding method is a widely used technique for linearizing a system of nonlinear differential equations, but fails to converge in regions where there are multiple fixed points. We propose and test three different versions of a global pi...
Generation of multipartite photonic entanglement using a trapped-ion quantum processing node
Marco Canteri, James Bate, Ida Mishra +3 more·Oct 17, 2025
The ability to establish entanglement between the nodes of future quantum networks is essential for enabling a wide range of new applications in science and technology. A promising approach involves the use of a powerful central node capable of deter...