Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Generation of Large Coherent-State Superpositions in Free-Space Optical Pulses
Lucas Caron, Hector Simon, Hugo Basset +2 more·Jan 14, 2026
The generation of non-Gaussian quantum states is a key requirement for universal continuous-variable quantum information processing. We report the experimental generation of large-amplitude squeezed coherent-state superpositions (squeezed cat states)...
A perturbative non-Markovian treatment to low-temperature spin decoherence
Timothy J. Krogmeier, Anthony W. Schlimgen, Kade Head-Marsden·Jan 14, 2026
Molecular spins are promising candidates for quantum information science, leveraging coherent electronic spin states for quantum sensing and computation. However, the practical application of these systems is hindered by electronic spin decoherence, ...
Light-induced Magnetization by Quantum Geometry
Hiroki Yoshida, Takehito Yokoyama·Jan 14, 2026
We propose a mechanism for the inverse Faraday and the inverse Cotton--Mouton effects arising from quantum geometry, characterized by the quantum metric quadrupole and the weighted quantum metric. Within a semiclassical framework based on the Boltzma...
Characterization of Silicon-Membrane TES Microcalorimeters for Large-Format X-ray Spectrometers with Integrated Microwave SQUID Readout
Avirup Roy, Robinjeet Singh, Joel C. Weber +17 more·Jan 14, 2026
We present the electro-thermal characterization of transition-edge sensor (TES) detectors suspended on Si membranes fabricated using a silicon-on-insulator (SOI) wafer. The use of an all-silicon fabrication platform, in contrast to the more commonly ...
Spectral Distribution of Exceptional Points in Lattices with Localized Loss
J. R. Silva·Jan 14, 2026
We explore the existence and stability of exceptional points (EPs) in finite waveguide arrays subject to single-site dissipation. We show that the EP landscape is dictated by a geometry-dependent parity effect, leading to strictly distinct spectral b...
Dissipative State Engineering of Complex Entanglement with Markovian Dynamics
Manish Chaudhary·Jan 14, 2026
Highly multipartite entangled states play an important role in various quantum computing tasks. We investigate the dissipative generation of a complex entanglement structure as in a cluster state through engineered Markovian dynamics in the spin syst...
Genuine multipartite Rains entanglement
Hailey S. Murray, Sagnik Bhattacharya, M. Cerezo +2 more·Jan 14, 2026
We introduce the genuine multipartite Rains entanglement (GMRE) as a measure of genuine multipartite entanglement that can be computed using semi-definite programming. Similar to the Rains relative entropy (its bipartite counterpart), the GMRE is mon...
High-Resolution Spectroscopy of $^{173}$Yb$^{+}$ Ions
J. Jiang, A. V. Viatkina, Saaswath JK +7 more·Jan 14, 2026
Compared to other stable isotopes of $\rm{Yb}^+$, $^{173}\rm{Yb}^+$ has a richer hyperfine structure, which leads to more favorable clock transitions, spectroscopic techniques for probing new physics, and more sophisticated quantum computing architec...
Lattice fermion simulation of spontaneous time-reversal symmetry breaking in a helical Luttinger liquid
V. A. Zakharov, J. Sánchez Fernán, C. W. J. Beenakker·Jan 14, 2026
We extend a recently developed "tangent fermion" method to discretize the Hamiltonian of a helical Luttinger liquid on a one-dimensional lattice, including two-particle backscattering processes that may open a gap in the spectrum. The fermion-doublin...
Is it possible to determine unambiguously the Berry phase solely from quantum oscillations?
Bogdan M. Fominykh, Valentin Yu. Irkhin, Vyacheslav V. Marchenkov·Jan 14, 2026
The Berry phase, a fundamental geometric phase in quantum systems, has become a crucial tool for probing the topological properties of materials. Quantum oscillations, such as Shubnikov-de Haas (SdH) oscillations, are widely used to extract this phas...
Quantum properties of heavy-fermion pairs at a lepton collider with polarised beams
Mohammad Mahdi Altakach, Priyanka Lamba, Fabio Maltoni +1 more·Jan 14, 2026
We investigate the quantum properties of heavy-fermion pairs, such as $t\bar t$ or $τ^+τ^-$, produced in lepton-lepton collisions with polarised beams. Focusing on spin correlations, entanglement, Bell-inequality violation, and quantum-information-th...
Geometry- and Topology-Informed Quantum Computing: From States to Real-Time Control with FPGA Prototypes
Gunhee Cho·Jan 14, 2026
This book gives a geometry-first, hardware-aware route through quantum-information workflows, with one goal: connect states, circuits, and measurement to deterministic classical pipelines that make hybrid quantum systems run. Part 1 develops the back...
Non-invertible circuit complexity from fusion operations
Saskia Demulder·Jan 14, 2026
Modern understanding of symmetry in quantum field theory includes both invertible and non-invertible operations. Motivated by this, we extend Nielsen's geometric approach to quantum circuit complexity to incorporate non-invertible gates. These arise ...
Reservoir-Engineered Refrigeration of a Superconducting Cavity with Double-Quantum-Dot Spin Qubits
Daryoosh Vashaee, Jahanfar Abouie·Jan 14, 2026
We present an analytically tractable theory of reservoir-engineered refrigeration of a superconducting microwave cavity and map it onto a realistic solid-state implementation based on gate-defined double-quantum-dot (DQD) spin qubits. Treating the DQ...
Toward Spectral Engineering of Squeezed Light in High-Gain PDC
Jatin Kumar, Aleksa Krstić, Sina Saravi +1 more·Jan 14, 2026
We investigated the spectral properties of squeezed light generated via parametric down-conversion in the high-gain regime, considering both unapodized and apodized dispersion-engineered waveguides. The gain-dependent evolution of these states is exa...
Three questions on the future of quantum science and technology
S. Radenkovic, M. Dugic, I. Radojevic·Jan 14, 2026
The answers on the current status and future development of Quantum Science and Technology are presented.
Stationary perturbation theory without sums over intermediate states: Supersymmetric Expansion Algorithm
M. Napsuciale, S. Rodríguez·Jan 14, 2026
In this work we show that results of Rayleigh-Schrödinger perturbation theory can be easily obtained using the recently proposed supersymmetric expansion algorithm. Our formalism avoids the sums over intermediate states and yield directly corrections...
A measurement-based protocol for the generation of delocalised quantum states of a mechanical system
Matteo Bordin·Jan 14, 2026
Non-Gaussian mechanical states are a key resource for quantum-enhanced sensing and tests of macroscopic quantum physics. We propose a measurement-based protocol to herald delocalized, nonclassical states of a mechanical oscillator in cavity optomecha...
Emergence of Rich Dissipative Phases in the Anisotropic Quantum Rabi Model Driven by the $\mathbf{A}^{2}$ Term
Jun-Ling Wang, Yi-bo Liu, Qing-Hu Chen·Jan 14, 2026
The open quantum Rabi model is studied in this work, with the explicit $\mathbf{A}^{2}$ term incorporated. It is shown that anisotropy provides a generic and robust mechanism for establishing a genuine platform for observing dissipative phase transit...
Sparse quantum state preparation with improved Toffoli cost
Felix Rupprecht, Sabine Wölk·Jan 14, 2026
The preparation of quantum states is one of the most fundamental tasks in quantum computing, and a key primitive in many quantum algorithms. Of particular interest to areas such as quantum simulation and linear-system solvers are sparse quantum state...