Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Exponential-to-polynomial scaling of measurement overhead in circuit knitting via quantum tomography
Hiroyuki Harada, Kaito Wada, Naoki Yamamoto +1 more·Dec 22, 2025
Circuit knitting is a family of techniques that enables large quantum computations on limited-size quantum devices by decomposing a target circuit into smaller subcircuits. However, it typically incurs a measurement overhead exponential in the number...
Quantifying Decoherence
Mohd Shoaib Qureshi, Tabish Qureshi·Dec 22, 2025
Quantum decoherence refers to the phenomenon when the interaction of a quantum system with its environment results in the degradation of quantum coherence. Decoherence is considered to be the most popular mechanism responsible for the emergence of cl...
Quantum circuit algorithm for topological invariants of second order topological many-body quantum magnets
Sebastián Domínguez-Calderón, Marcel Niedermeier, Jose L. Lado +1 more·Dec 22, 2025
Topological quantum matter represents a flexible playground to engineer unconventional excitations. While non-interacting topological single-particle systems have been studied in detail, topology in quantum many-body systems remains an open problem. ...
Higher lattice gauge theory from representations of 2-groups and 3+1D topological phases
Latévi M. Lawson, Prince K. Osei·Dec 22, 2025
We construct a higher lattice gauge theory based on the representation of 2-groups described by a category of crossed modules on a lattice model described by path 2-groupoids. Using these lattice gauge representations, an exactly solvable Hamiltonian...
Nonequilibrium quantum thermometry with noncommutative system-bath couplings
Youssef Aiache, Abderrahim El Allati, İlkay Demir +1 more·Dec 22, 2025
Accurate temperature estimation in the quantum and cryogenic regimes remains a fundamental challenge. Here, we investigate nonequilibrium quantum thermometry using a single-qubit probe coupled to a bosonic bath through noncommuting interaction operat...
Input phase noise in Gaussian Boson sampling
Magdalena Parýzková, Craig S. Hamilton, Igor Jex +2 more·Dec 22, 2025
Gaussian boson sampling is an important protocol for testing the performance of photonic quantum simulators. As such, various noise sources have been investigated that degrade the operation of such devices. In this paper, we examine a situation with ...
Extracting quantum field theory dynamics from an approximate ground state
Sophie Mutzel, Antoine Tilloy·Dec 22, 2025
We develop a linear-programming method to extract dynamical information from static ground-state correlators in quantum field theory. We recast the Källén-Lehmann inversion as a convex optimization problem, in a spirit similar to the recent approach ...
Trigonometric continuous-variable gates and hybrid quantum simulations of the sine-Gordon model
Tommaso Rainaldi, Victor Ale, Matt Grau +5 more·Dec 22, 2025
Hybrid qubit-qumode quantum computing platforms provide a natural setting for simulating interacting bosonic quantum field theories. However, existing continuous-variable gate constructions rely predominantly on polynomial functions of canonical quad...
A Spin-Photon Interface in the Telecom C-Band with Long Hole Spin Dephasing Time
Johannes M. Michl, Reza Hekmati, Mohamed Helal +9 more·Dec 22, 2025
Matter qubits that maintain coherence over extended timescales are essential for many pursued applications in quantum communication and quantum computing. Significant progress has already been made on extending coherence times of spins in semiconduct...
$W$- and Dicke-state engineering using optimal global control in nearest-neighbor coupled ring-shaped qubit arrays
Andrea Muratori, Vladimir M. Stojanovic, Eloisa Cuestas +2 more·Dec 22, 2025
Motivated by a compelling need for time-efficient and robust schemes for quantum-state engineering in systems of neutral atoms in optical tweezers, we consider a ring-shaped array of qubits with nearest-neighbor Ising-type ($zz$) coupling and transve...
Spin Response of a Magnetic Monopole and Quantum Hall Response in Topological Lattice Models through Local Invariants and Light
Karyn Le Hur, Andrea Baldanza·Dec 22, 2025
Here, we elaborate on and develop the geometrical approach introduced in K. Le Hur, Physics Reports 1104 1-42 (2025) between the magnetic monopole created from a radial field, quantum physics and topological lattice models through quantum phase trans...
Harnessing non-Hermiticity for efficient quantum state transfer
Sejal Ahuja, Keshav Das Agarwal, Aditi Sen De·Dec 22, 2025
The non-Hermitian Hamiltonian describes the effective dynamics of a system coupled to a continuously measured bath, and can exhibit anti-unitary symmetries that give rise to exceptional points and broken phases with complex eigenvalues, features uniq...
Open Quantum Systems as Regular Holonomic $\mathcal{D}$-Modules: The Mixed Hodge Structure of Spectral Singularities
Prasoon Saurabh·Dec 22, 2025
The geometric description of open quantum systems via the Quantum Geometric Tensor (QGT) traditionally relies on the assumption that the physical states form a differentiable vector bundle over the parameter manifold. This framework becomes ill-posed...
Analytical study of birefringent cavities for axion-like dark matter search
Tadashi Kuramoto, Yasutaka Imai, Takahiko Masuda +3 more·Dec 22, 2025
Light polarization plays a crucial role in optical-cavity experiments; however, mirror birefringence presents a significant challenge that must be addressed carefully. In this study, a rigorous, nonperturbative framework is developed to quantify bire...
Holographic Tensor Networks as Tessellations of Geometry
Qiang Wen, Mingshuai Xu, Haocheng Zhong·Dec 22, 2025
Holographic tensor networks serve as toy models for the Anti-de Sitter/Conformal Field Theory (AdS/CFT) correspondence, capturing many of its essential features in a concrete manner. However, existing holographic tensor network models remain far from...
Generative Krylov Subspace Representations for Scalable Quantum Eigensolvers
Changwon Lee, Daniel K. Park·Dec 22, 2025
Predicting ground state energies of quantum many-body systems is one of the central computational challenges in quantum chemistry, physics, and materials science. Krylov subspace methods, such as Krylov Quantum Diagonalization and Sample-based Krylov...
Clifford Volume and Free Fermion Volume: Complementary Scalable Benchmarks for Quantum Computers
Attila Portik, Orsolya Kálmán, Thomas Monz +1 more·Dec 22, 2025
As quantum computing advances toward the late-NISQ and early fault-tolerant eras, scalable and platform-independent benchmarks are essential for quantifying computational capacity in a classically verifiable manner. We introduce two volumetric benchm...
Ab initio prediction of strain-tunable spin defects in quasi-1D TiS3 and NbS3 nanowires
Jordan Chapman, Arindom Nag, Thang Pham +1 more·Dec 22, 2025
Defects in atomically thin van der Waals materials have recently been investigated as sources of spin-photon entanglement with sensitivity to strain tuning. Unlike many two-dimensional materials, quasi-one-dimensional materials such as transition met...
A deterministic approach for integrating an emitter in a nanocavity with subwavelength light confinement
Valdemar Bille-Lauridsen, Rasmus Ellebæk Christiansen, Yi Yu +1 more·Dec 22, 2025
We introduce a novel light-matter interface that integrates a nanoscale buried heterostructure emitter into a dielectric bowtie cavity, co-localising the optical hotspot and the electronic wavefunction. This platform enables strong light-matter inter...
Talking with a ghost: semi-virtual coupled levitated oscillators
Ronghao Yin, Yugang Ren, Deok Young Seo +4 more·Dec 22, 2025
Mesoscopic particles levitated by optical, electrical or magnetic fields act as mechanical oscillators with a range of surprising properties, such as tuneable oscillation frequencies, access to rotational motion, and remarkable quality factors. Coupl...