Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Beyond critical coupling: optimal design considerations for spontaneous four-wave mixing in microring resonators
Joseph M. Lukens, Karthik V. Myilswamy, Alexander Miloshevsky +1 more·Nov 11, 2025
We present a self-contained analytical model for biphoton generation in microring resonators. Encompassing both all-pass and add-drop geometries, identical and distinct pump and biphoton coupling coefficients, and continuous-wave and pulsed pumping, ...
Bootstrapping Euclidean Two-point Correlators
Minjae Cho, Barak Gabai, Henry W. Lin +2 more·Nov 11, 2025
We develop a bootstrap approach to Euclidean two-point correlators, in the thermal or ground state of quantum mechanical systems. We formulate the problem of bounding the two-point correlator as a semidefinite programming problem, subject to the cons...
Design boosters: from constant-time quantum chaos to $\infty$-designs and beyond
Soumik Ghosh, Arjun Mirani, Yihui Quek +1 more·Nov 11, 2025
We study a counterintuitive property of 'conditioning' on the result of measuring a subsystem of a quantum state: such conditioning can boost design quality, at the cost of increased system size. We work in the setting of deep thermalization from man...
The FLuid Allocation of Surface code Qubits (FLASQ) cost model for early fault-tolerant quantum algorithms
William J. Huggins, Tanuj Khattar, Amanda Xu +6 more·Nov 11, 2025
Holistic resource estimates are essential for guiding the development of fault-tolerant quantum algorithms and the computers they will run on. This is particularly true when we focus on highly-constrained early fault-tolerant devices. Many attempts t...
Dynamical Chaos in a Dissipative Driven Quantum Soft Impact Oscillator
Titir Mukherjee, Arnab Acharya, Soumitro Banerjee +1 more·Nov 11, 2025
Dynamical chaos in a periodically driven, dissipative soft impact oscillator is investigated in the quantum regime using the complex-number quantum Langevin equation (c-number QLE). The averaged system dynamics are analyzed through a comprehensive su...
Reinforcement Learning Control of Quantum Error Correction
Volodymyr Sivak, Alexis Morvan, Michael Broughton +296 more·Nov 11, 2025
The promise of fault-tolerant quantum computing is challenged by environmental drift that relentlessly degrades the quality of quantum operations. The contemporary solution, halting the entire quantum computation for recalibration, is unsustainable f...
A Quantum Non-Gaussianity Criterion Based on Photon Correlations $g^{(2)}$ and $g^{(3)}$
Christoph Hotter, Clara Henke, Cornelis Jacobus van Diepen +2 more·Nov 11, 2025
Quantum non-Gaussian states, which cannot be written as mixtures of Gaussian states, are necessary to achieve a quantum advantage in continuous variable systems. They represent an important benchmark for the realization of an advanced quantum light s...
Comment on "Role of Matter Interactions in Superradiant Phenomena"
Max Hörmann, Anja Langheld, Jonas Leibig +2 more·Nov 11, 2025
Recently, Mendonça et al. [arXiv:2503.04961] investigated the Dicke-XXZ model and the Dicke-Ising model. For the latter model, their calculated quantum phase diagram contradicts claims about the existence of an intermediate phase with superradiant an...
Comparison of Two Optimization Methods for a Rydberg Quantum Gate
Luis S. Yagüe Bosch, Sandro Wimberger·Nov 11, 2025
A shortcut-to-adiabaticity is compared with a numerically optimized protocol for implementing a high-fidelity quantum gate on Rydberg atoms. The counterdiabatic method offers an analytical framework for accelerating high-fidelity gates by mimicking t...
Surprising applications of Newton's hyperbolism transform of curves in Fourier-transform spectroscopy
Dennis Huber, Steffen J. Glaser·Nov 11, 2025
The Fourier transform (FT) represents a key tool in modern spectroscopy which drastically reduces measurement times and helps to improve the signal-to-noise ratio in spectra. Fourier transforming exponentially decaying time domain signals gives Loren...
Exploring the performance of superposition of product states: from 1D to 3D quantum spin systems
Apimuk Sornsaeng, Itai Arad, Dario Poletti·Nov 11, 2025
Tensor networks (TNs) are one of the best available tools to study many-body quantum systems. TNs are particularly suitable for one-dimensional local Hamiltonians, while their performance for generic geometries is mainly limited by two aspects: the l...
Stacking and the triviality of invertible phases
Sven Bachmann, Alan Getz, Pieter Naaijkens +1 more·Nov 11, 2025
We study the superselection sectors of two quantum lattice systems stacked onto each other in the operator algebraic framework. We show in particular that all irreducible sectors of a stacked system are unitarily equivalent to a product of irreducibl...
An Information-Minimal Geometry for Qubit-Efficient Optimization
Gordon Ma, Dimitris G. Angelakis·Nov 11, 2025
Qubit-efficient optimization studies how large combinatorial problems can be addressed with quantum circuits whose width is far smaller than the number of logical variables. In quadratic unconstrained binary optimization (QUBO), objective values depe...
Hybrid Quantum-Classical Selective State Space Artificial Intelligence
Amin Ebrahimi, Farzan Haddadi·Nov 11, 2025
Hybrid Quantum Classical (HQC) algorithms constitute one of the most effective paradigms for exploiting the computational advantages of quantum systems in large-scale numerical tasks. By operating in high-dimensional Hilbert spaces, quantum circuits ...
Quantum annealing for lattice models with competing long-range interactions
Jan Alexander Koziol, Kai Phillip Schmidt·Nov 11, 2025
We use superconducting qubit quantum annealing devices to determine the ground state of Ising models with algebraically decaying competing long-range interactions in the thermodynamic limit. This is enabled by a unit-cell-based optimization scheme, i...
Dynamic Depth Quantum Approximate Optimization Algorithm for Solving Constrained Shortest Path Problem
Rakesh Saini, Nora Mohamed, Saif Al-Kuwari +1 more·Nov 11, 2025
The Quantum Approximate Optimization Algorithm (QAOA) has emerged as a promising approach for solving NP hard combinatorial optimization problems on noisy intermediate-scale quantum (NISQ) hardware. However, its performance is critically dependent on...
Comprehensive Analysis of Geometric Phase for SU(3) Representations
Abhirup Chatterjee, Sobhan Kumar Sounda·Nov 11, 2025
Geometric Phase in Quantum Mechanics is generally formulated entirely in terms of geometric structure of the Complex Hilbert Space. We will exploit this fact in case of mixed states for three level open systems undergoing depolarization using the eig...
Cryogenic source of atomic tritium for neutrino-mass measurements and precision spectroscopy
Aleksei Semakin, Janne Ahokas, Tom Kiilerich +9 more·Nov 11, 2025
We propose a concept for a cryogenic source of atomic tritium at sub-Kelvin temperatures and energies suitable for magnetic trapping. The source is based on the dissociation of solid molecular T2 films below 1 K by electrons from a pulsed RF discharg...
Excited $Σ$ states of the hydrogen-antihydrogen molecule
L. Brumm, J. Schürmann, A. Saenz·Nov 11, 2025
Adopting explicitly correlated Kolos-Wolniewicz-type basis functions, the Born-Oppenheimer potential curves of a number of excited $Σ$ states of the hydrogen-antihydrogen system ($\bar{\rm H}$) were calculated for both, even and odd, Q symmetries, in...
Quantum-driven sampling of the quasi-uniform distribution via quantum walks
Marco Radaelli, Claudia Benedetti, Stefano Olivares·Nov 11, 2025
We investigate the use of discrete-time quantum walks to sample from an almost-uniform distribution, in the absence of any external source of randomness. Integers are encoded on the vertices of a cycle graph, and a quantum walker evolves for a fixed ...