Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Quantization of Physical Interaction Strengths via Singular Moduli
Prasoon Saurabh·Dec 25, 2025
Since the 2019 redefinition of the SI units, precision metrology has sought to anchor all physical quantities to fundamental constants and integer invariants. While the optical frequency comb revolutionized timekeeping by discretizing the continuum o...
Interaction-Resilient Scalable Fluxonium Architecture with All-Microwave Gates
Andrei A. Kugut, Grigoriy S. Mazhorin, Ilya A. Simakov·Dec 24, 2025
Fluxonium qubits demonstrate exceptional potential for quantum processing; yet, realizing scalable architectures using them remains challenging. We propose a fluxonium-based square-grid design with fast $\sim63$~ns controlled-Z (CZ) gates, achieving ...
Holonomic multi-controlled gates for single-photon states
Carlo Danieli, Valentina Brosco, Claudio Conti +1 more·Dec 24, 2025
Controlled and multi-controlled quantum gates, whose action on a target qubit depends on the state of multiple control qubits, represent a fundamental logical building block for complex quantum algorithms. We propose a scheme for realizing this class...
Using bosons to improve resource efficiency of quantum simulation of vibronic molecular dynamics
Henry L. Nourse, Vanessa C. Olaya-Agudelo, Ivan Kassal·Dec 23, 2025
Simulating chemical dynamics is computationally challenging, especially for nonadiabatic dynamics, where numerically exact classical simulations scale exponentially with system size, becoming intractable for even small molecules. On quantum computers...
Quantum Universality in Composite Systems: A Trichotomy of Clifford Resources
Alejandro Borda, Julian Rincon, César Galindo·Dec 23, 2025
The Clifford group is efficiently classically simulable, and universality is obtained by supplementing it with non-Clifford resources. We determine which single-qudit gates suffice to achieve universality. We show that the structure of such resources...
Quantum Gates from Wolfram Model Multiway Rewriting Systems
Furkan Semih Dündar, Xerxes D. Arsiwalla, Hatem Elshatlawy·Dec 23, 2025
We show how representations of finite-dimensional quantum operators can be constructed using nondeterministic rewriting systems. In particular, we investigate Wolfram model multiway rewriting systems based on string substitutions. Multiway systems we...
Hardware-aware and Resource-efficient Circuit Packing and Scheduling on Trapped-Ion Quantum Computers
Miguel Palma, Shuwen Kan, Wenqi Wei +4 more·Dec 23, 2025
The rapid expansion of quantum cloud services has led to long job queues due to single-tenant execution models that underutilize hardware resources. Quantum multi-programming (QMP) mitigates this by executing multiple circuits in parallel on a single...
Experimental characterization of the Toffoli gate via channel spectrum benchmarking
D. K. Korliakov, B. I. Bantysh, A. S. Borisenko +2 more·Dec 23, 2025
Channel spectrum benchmarking (CSB) provides a robust framework for characterizing quantum gate fidelities while remaining insensitive to state preparation and measurement (SPAM) errors. Yet, current CSB implementations encounter fundamental challeng...
Quantum State Preparation via Schmidt Spectrum Optimisation
Josh Green, Joshua Snow, Jingbo B Wang·Dec 23, 2025
We introduce an efficient algorithm for the systematic design of shallow-depth quantum circuits capable of preparing many-body quantum states represented as Matrix Product States (MPS). The proposed method leverages Schmidt spectrum optimization (SSO...
Exploring the nature of gravity with quantum information methods
Bruna Sahdo, Natália Salomé Móller·Dec 23, 2025
The aim of this article is to provide an introduction to the use of quantum information methods for investigating the interface between quantum theory and gravity. To this end, we discuss the basic principles of two current research streams that use ...
Profusion of Symmetry-Protected Qubits from Stable Ergodicity Breaking
Thomas Iadecola, Rahul Nandkishore·Dec 23, 2025
We show how combining a discrete symmetry with topological Hilbert space fragmentation can give rise to exponentially many topologically stable qubits protected by a single discrete symmetry. We illustrate this explicitly with the example of the $\ma...
Highly Tunable Two-Qubit Interactions in Si/SiGe Quantum Dots by Interchanging the Roles of Qubit-Defining Gates
Jaemin Park, Hyeongyu Jang, Hanseo Sohn +5 more·Dec 23, 2025
Silicon quantum dot spin qubits have become a promising platform for scalable quantum computing because of their small size and compatibility with industrial semiconductor manufacturing processes. Although Si/SiGe heterostructures are commonly used t...
Regression of Functions by Quantum Neural Networks Circuits
Fernando M. de Paula Neto, Lucas dos Reis Silva, Paulo S. G. de Mattos Neto +1 more·Dec 23, 2025
The performance of quantum neural network models depends strongly on architectural decisions, including circuit depth, placement of parametrized operations, and data-encoding strategies. Selecting an effective architecture is challenging and closely ...
Analytical blueprint for 99.999% fidelity X-gates on present superconducting hardware under strong driving
José Diogo Da Costa Jesus, Boxi Li, Yuan Gao +3 more·Dec 22, 2025
Achieving very fast gates that undercut the natural limits set by decoherence requires going into the strong driving limit. Realizing single-qubit control predicted beyond semi-classical, time-dependent modeling has yet to be experimentally realized ...
High-efficiency loading of 2,400 Ytterbium atoms in optical tweezer arrays
Jiawen Zhu, Changfeng Chen, Li Zhou +10 more·Dec 22, 2025
Neutral atom arrays have emerged as a powerful platform for quantum computation, simulation, and metrology. Among them, alkaline-earth-like atoms exhibit distinct advantages, including long coherence time and high-fidelity Rydberg gates. However, the...
Micromagnet-free operation of electron spin qubits in Si/Si$_{1-x}$Ge$_x$ vertical double quantum dots
Abhikbrata Sarkar, Daniel Loss·Dec 22, 2025
We study a vertical double quantum dot (DQD) in a Si/Si$_{1-x}$Ge$_x$/Si double-well heterostructure for full electrical control of electron Loss-DiVincenzo (LD) spin qubits, using realistic device modeling and numerical simulations. Due to the emerg...
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...
Optical parametric free-electron--photon quantum interaction
Zetao Xie, Zehai Pang, Yi Yang·Dec 22, 2025
Optical parametric processes underpin quantum photonics, while free-electron--photon interactions offer agile pathways to generate nontrivial quantum photonic states. These threads have so far largely progressed independently, whereas placing free el...
Hermitian Matrix Function Synthesis without Block-Encoding
Anuradha Mahasinghe, Kaushika De Silva, Xavier Cadet +3 more·Dec 20, 2025
Implementing arbitrary functions of Hermitian matrices on quantum hardware is a foundational task in quantum computing, critical for accurate Hamiltonian simulation, quantum linear system solving, high-fidelity state preparation, machine learning ker...
Real 3-qubit gate decompositions via triality
Brendan Pawlowski·Dec 19, 2025
We show that any unimodular real 3-qubit gate can be expressed as the product of at most 14 CNOT gates plus single-qubit gates, improving on the bound of 16 CNOTs due to Wei and Di. Our method uses the exotic triality symmetry of $\operatorname{PSO}(...