Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
In-Substrate Imaging of Diamond hBN FET Current via Widefield Quantum Diamond Microscopy
Anuj Bathla, Subrat Kumar Pradhan, Ajit Kumar Dash +7 more·Jan 21, 2026
We demonstrate widefield magnetic imaging of current flow in hydrogen terminated diamond field effect transistors (FETs) through in-substrate nitrogen vacancy (NV) centers. Hydrogen termination of the diamond surface induces a two dimensional hole ga...
Scaling Enhancement in Distributed Quantum Sensing via Causal Order Switching
Binke Xia, Zhaotong Cui, Jingzheng Huang +2 more·Jan 21, 2026
Sensing networks underpin applications from fundamental physics to real-world engineering. Recently, distributed quantum sensing (DQS) has been investigated to boost the sensing performance, yet current schemes typically rely on entangled probes that...
Precision limit under weak-coupling with ancillary qubit
Peng Chen, Jun Jing·Jan 21, 2026
We propose a measurement-based quantum metrology protocol in a composite model, where the probe system (a spin ensemble) is coupled to an ancillary two-level system (qubit) with a general Heisenberg XXZ interaction. With an optimized and weak probe-a...
Quantum Interference Needs Convention: Overlap-Determinability and Unified No-Superposition Principle
Jeongho Bang, Kyoungho Cho, Ki Hyuk Yee·Jan 21, 2026
Quantum superposition is often phrased as the ability to add state vectors. In practice, however, the physical quantity is a ray (a rank-one projector), so each input specifies only a projector and leaves a gauge freedom in the phases of its vector r...
Programming Quantum Measurements of Time inside a Complex Medium
Dylan Danese, Vatshal Srivastav, Will McCutcheon +2 more·Jan 21, 2026
The temporal degree-of-freedom of light is incredibly powerful for modern quantum technologies, enabling large-scale quantum computing architectures and record key-rates in quantum key distribution. However, the generalized measurement of large and c...
Self-Aligned Heterogeneous Quantum Photonic Integration
Kinfung Ngan, Yeeun Choi, Chun-Chieh Chang +2 more·Jan 21, 2026
Integrated quantum photonics holds significant promise for scalable photonic quantum information processing, quantum repeaters, and quantum networks, but its development is hindered by the mismatch between materials hosting high-quality quantum emitt...
Active interference suppression in frequency-division-multiplexed quantum gates via off-resonant microwave tones
Haruki Mitarai, Yukihiro Tadokoro, Hiroya Tanaka·Jan 21, 2026
The increasing number of control lines connecting quantum processors to external electronics constitutes a major bottleneck in the realization of large-scale quantum computers. Frequency-division multiplexing is expected to enable control of multiple...
On the quantum separability of qubit registers
Szymon Lukaszyk·Jan 21, 2026
I show that the bipartite separability of a pure qubit state hinges critically on the combinatorial structure of its computational-basis support. Boolean cube geometry is used to introduce a taxonomy that distinguishes support-guaranteed separability...
Spin-$s$ $U(1)$-eigenstate preparation
Nabi Zare Harofteh, Rafael I. Nepomechie·Jan 20, 2026
We formulate a deterministic algorithm for preparing a general $U(1)$-eigenstate of a spin-$s$ chain of length $n$. These states consist of linear combinations of computational basis states $|\vec{m}\rangle$ of $n$ qudits, each with $(2s+1)$ levels a...
A Modulated Electron Lattice (MEL) Criterion for Metallic Superconductivity
Jaehwahn Kim, Davis A. Rens, Waqas Khalid +1 more·Jan 20, 2026
A central unresolved question in the theory of superconductivity is why only a small subset of metallic elements exhibit a superconducting state, whereas many others remain strictly normal. Neither the conventional Bardeen Cooper Schrieffer (BCS) fra...
Quantum Super-resolution by Adaptive Non-local Observables
Hsin-Yi Lin, Huan-Hsin Tseng, Samuel Yen-Chi Chen +1 more·Jan 20, 2026
Super-resolution (SR) seeks to reconstruct high-resolution (HR) data from low-resolution (LR) observations. Classical deep learning methods have advanced SR substantially, but require increasingly deeper networks, large datasets, and heavy computatio...
Quantum state exclusion with many copies
Debanjan Roy, Tathagata Gupta, Pratik Ghosal +2 more·Jan 20, 2026
Quantum state exclusion is the task of identifying at least one state from a known set that was not used in the preparation of a quantum system. A set of quantum states is said to admit state exclusion if there exists a measurement whose outcomes can...
Pauli Propagation for Imaginary-Time Evolution
Rafael Gómez-Lurbe, Armando Pérez·Jan 20, 2026
We extend the Pauli Propagation framework to simulate imaginary-time evolution. By deriving explicit update rules for the propagation of Pauli operators under imaginary-time evolution generated by Pauli strings, we introduce an imaginary-time Pauli P...
Differentiable quantum-trajectory simulation of Lindblad dynamics for QGP transport-coefficient inference
Lukas Heinrich, Tom Magorsch·Jan 20, 2026
We study parameter estimation for the transport coefficients of the quark-gluon plasma by differentiating open-quantum-system-based Monte Carlo simulations of quarkonium suppression. The underlying simulator requires solving a Lindblad equation in a ...
Non-zero Momentum Implies Long-Range Entanglement When Translation Symmetry is Broken in 1D
Amanda Gatto Lamas, Taylor L. Hughes·Jan 20, 2026
A result by Gioia and Wang [Phys Rev X 12, 031007 (2022)] showed that translationally symmetric states having nonzero momentum are necessarily long range entangled (LRE). Here, we consider the question: can a notion of momentum for non-translation sy...
Entanglement scaling and dynamics in the Sauter-Schwinger effect
S. Mahesh Chandran, Karthik Rajeev·Jan 20, 2026
In quantum field theory, entanglement entropy under spatial bipartitioning serves as a powerful information-theoretic probe of quantum correlations. In this work, we present the first comprehensive numerical study of the dynamical evolution and geome...
Vanishing correlations in (bi)stochastic controlled circuits
Pavel Kos, Bruno Bertini, Tomaž Prosen·Jan 20, 2026
We study the dynamics of circuits composed of stochastic and bistochastic controlled gates. This type of dynamics arises from quantum circuits with random controlled gates, as well as in stochastic circuits and deterministic classical cellular automa...
Vacuum Torque Without Anisotropy: Switchable Casimir Torque Between Altermagnets
Zixuan Dai, Qing-Dong Jiang·Jan 20, 2026
Casimir torque is conventionally associated with explicit breaking of rotational symmetry, arising from material dielectric anisotropy, geometric asymmetry, or externally applied fields that themselves break rotational invariance. Here we demonstrate...
Towards Device-Independent Quantum Key Distribution with Photonic Devices
Corentin Lanore, Xavier Valcarce, Jean Etesse +2 more·Jan 20, 2026
Quantum Key Distribution (QKD) protocols enable two distant parties to communicate with information-theoretically proven secrecy. However, these protocols are generally vulnerable to potential mismatches between the physical modeling and the implemen...
Deep Learning Approaches to Quantum Error Mitigation
Leonardo Placidi, Ifan Williams, Enrico Rinaldi +4 more·Jan 20, 2026
We present a systematic investigation of deep learning methods applied to quantum error mitigation of noisy output probability distributions from measured quantum circuits. We compare different architectures, from fully connected neural networks to t...