Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Reversing Heat Flow by Coherence in a Multipartite Quantum System
Keyi Huang, Qi Zhang, Xiangjing Liu +12 more·Jan 1, 2026
The second law of thermodynamics dictates that heat flows spontaneously from a high-temperature entity to a lower-temperature one. Yet, recent advances have demonstrated that quantum correlations between a system and its thermal environment can induc...
Towards a temperature-insensitive composite diamond clock
Sean Lourette, Andrey Jarmola, Jabir Chathanathil +8 more·Jan 1, 2026
Frequency references based on solid state spins promise simplicity, compactness, robustness, multifunctionality, ease of integration, and high densities of emitters. Nitrogen-vacancy (NV) centers in diamond are a natural candidate, but the electronic...
Toward $\textit{Ab Initio}$ Quantum Simulations of Atomic Nuclei Using Noisy Qubits
Chongji Jiang, Junchen Pei, R. Hu +4 more·Jan 1, 2026
Quantum computers are expected to provide a ultimate solver for quantum many-body systems, although it is a tremendous challenge to achieve that goal on current noisy quantum devices. This work illustrated quantum simulations of ab initio no-core she...
(PhD Thesis) The Information Locally Stored in Quantum Fields: From Entanglement to Gravity
T. Rick Perche·Dec 31, 2025
This is an updated version of my PhD thesis, defended at the University of Waterloo on the 2nd of April 2025, uploaded to the ArXiv with the goal of reaching a wider audience. The thesis is divided into 5 chapters, respectively containing (I) a brief...
A compellingly simple proof of the speed of sound for interacting bosons
J. Eisert·Dec 31, 2025
On physical grounds, one expects locally interacting quantum many-body systems to feature a finite group velocity. This intuition is rigorously underpinned by Lieb-Robinson bounds that state that locally interacting Hamiltonians with finite-dimension...
Double-Pumped Kerr Parametric Amplifier Beyond the Gain-Bandwidth Limit
Nicolas Zapata, Najmeh Etehadi Abari, Mitchell Field +5 more·Dec 31, 2025
Superconducting standing$-$wave parametric amplifiers are crucial for the readout of microwave quantum devices. Despite significant improvements in recent years, the need to operate near an instability point imposes a fundamental constraint: the inst...
Detection Efficiency Bounds in (Semi-)Device-Independent Scenarios
Tailan S. Sarubi, Santiago Zamora, Moisés Alves +3 more·Dec 31, 2025
This article provides a comprehensive review of the critical role of detection efficiency in demonstrating non-classicality across various device-independent and semi-device-independent scenarios. The central focus is the detection loophole, a challe...
Automated electrostatic characterization of quantum dot devices in single- and bilayer heterostructures
Merritt P. R. Losert, Dario Denora, Barnaby van Straaten +6 more·Dec 31, 2025
As quantum dot (QD)-based spin qubits advance toward larger, more complex device architectures, rapid, automated device characterization and data analysis tools become critical. The orientation and spacing of transition lines in a charge stability di...
Pauli stabilizer formalism for topological quantum field theories and generalized statistics
Yitao Feng, Hanyu Xue, Ryohei Kobayashi +2 more·Dec 31, 2025
Topological quantum field theory (TQFT) provides a unifying framework for describing topological phases of matter and for constructing quantum error-correcting codes, playing a central role across high-energy physics, condensed matter, and quantum in...
Classical vs quantum dynamics and the onset of chaos in a macrospin system
Haowei Fan, Vladimir Fal'ko, Xiao Li·Dec 31, 2025
We study a periodically driven macrospin system with anisotropic long-range interactions and collective dissipation, described by a Lindblad master equation. In the thermodynamic limit ($N\to\infty$), a mean-field treatment yields classical equations...
Thermalization in a closed quantum system from randomized dynamics
Nikolay V. Gnezdilov, Andrei I. Pavlov·Dec 31, 2025
The emergence of statistical mechanics from quantum dynamics is a central problem in quantum many-body physics. Deriving observables aligned with the prediction of the canonical ensemble for a quantum system relies on the presence of a bath provided ...
Randomization Times under Quantum Chaotic Hamiltonian Evolution
Souradeep Ghosh, Nicholas Hunter-Jones, Joaquin F. Rodriguez-Nieva·Dec 31, 2025
Randomness generation through quantum-chaotic evolution underpins foundational questions in statistical mechanics and applications across quantum information science, including benchmarking, tomography, metrology, and demonstrations of quantum comput...
No-cost Bell Nonlocality Certification from Quantum Tomography and Its Applications in Quantum Magic Witnessing
Pawel Cieslinski, Lukas Knips, Harald Weinfurter +1 more·Dec 31, 2025
Tomographic measurements are the standard tool for characterizing quantum states, yet they are usually regarded only as means for state reconstruction or fidelity measurement. Here, we show that the same Pauli-basis measurements (X, Y, Z) can be dire...
Parity order as a fundamental driver of bosonic topology
Ashirbad Padhan, Harsh Nigam·Dec 31, 2025
Symmetry-protected topological (SPT) phases in interacting bosonic systems have been widely explored, yet most realizations rely on fine-tuned interactions or enlarged symmetries. Here we show that a qualitatively simpler mechanism--parity order coup...
Strategies for Overcoming Gradient Troughs in the ADAPT-VQE Algorithm
Jonas Stadelmann, Julian Übelher, Mafalda Ramôa +3 more·Dec 31, 2025
The adaptive derivative-assembled problem-tailored variational quantum eigensolver (ADAPT-VQE) provides a promising approach for simulating highly correlated quantum systems on quantum devices, as it strikes a balance between hardware efficiency, tra...
Numerical study of boson mixtures with multi-component continuous matrix product states
Wei Tang, Benoît Tuybens, Jutho Haegeman·Dec 31, 2025
The continuous matrix product state (cMPS) ansatz is a promising numerical tool for studying quantum many-body systems in continuous space. Although it provides a clean framework that allows one to directly simulate continuous systems, the optimizati...
Mathieu Control of the Effective Coupling in Superconducting Qubits
Yi-Han Yu, Xin-Yi Li, Kai Xu +1 more·Dec 31, 2025
A common challenge in superconducting quantum circuits is the trade-off between strong coupling and computational subspace integrity. We present Mathieu control, which uses a non-resonant two-photon drive to create a selective nonlinear frequency shi...
Any Clifford+T circuit can be controlled with constant T-depth overhead
Isaac H. Kim, Tuomas Laakkonen·Dec 31, 2025
Since an n-qubit circuit consisting of CNOT gates can have up to $Ω(n^2/\log{n})$ CNOT gates, it is natural to expect that $Ω(n^2/\log{n})$ Toffoli gates are needed to apply a controlled version of such a circuit. We show that the Toffoli count can b...
Lindbladian PT phase transitions
Yuma Nakanishi, Tomohiro Sasamoto·Dec 31, 2025
A parity-time (PT) transition is a spectral transition characteristic of non-Hermitian generators; it typically occurs at an exceptional point, where multiple eigenvectors coalesce. The concept of a PT transition has been extended to Markovian open q...
GEQIE Framework for Rapid Quantum Image Encoding
Rafał Potempa, Michał Kordasz, Józef P. Cyran +2 more·Dec 31, 2025
This work presents a Python framework named after the General Equation of Quantum Image Encoding (GEQIE). The framework creates the image-encoding state using a unitary gate, which can later be transpiled to target quantum backends. The benchmarking ...