Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Ergodic dynamics in iterated quantum protocols
Attila Portik, Orsolya Kálmán, Tamás Kiss·Dec 30, 2025
We study measurement-induced nonlinear dynamics generated by an iterated quantum protocol combining an entangling gate, a single-qubit rotation, and post-selection. For pure single-qubit inputs, a particular choice of the single-qubit unitary yields ...
Deterministic distribution of W-class states in quantum networks
Souvik Chatterjee, Prasenjit Deb, Chandan Datta +1 more·Dec 30, 2025
Multipartite entangled states possess a number of non-intuitive properties, making them a useful resource for various quantum information-processing tasks. The three-qubit W-state is one such example where every state is robust to single-qubit loss. ...
Using NV centers in diamond to detect DC to very-low frequency magnetic fields
Valts Krumins, Ivars Krastins, Oskars Rudzitis +3 more·Dec 30, 2025
In this work we present a compact and portable tabletop magnetometer that utilizes negatively charged nitrogen-vacancy (NV) centers in diamond. The magnetometer is operated using a dual microwave resonance detection approach in combination with an op...
The Quantum State Continuity Problem and Temporal Enforcement Against Fork Attacks
Samet Ünsal·Dec 30, 2025
We introduce the Quantum State Continuity Problem (QSCP), a security objective orthogonal to identity authentication that captures whether a systems current execution is a legitimate continuation of a unique past execution. We show that classical and...
Testing Noise Correlations by an AI-Assisted Two-Qubit Quantum Sensor
Dario Fasone, Shreyasi Mukherjee, Mauro Paternostro +3 more·Dec 30, 2025
We introduce and validate a machine learning-assisted protocol to classify time and space correlations of classical noise acting on a quantum system, using two interacting qubits as probe. We consider different classes of noise, according to their Ma...
One-Shot Structured Pruning of Quantum Neural Networks via $q$-Group Engineering and Quantum Geometric Metrics
Haijian Shao, Wei Liu, Xing Deng +1 more·Dec 30, 2025
Quantum neural networks (QNNs) suffer from severe gate-level redundancy, which hinders their deployment on noisy intermediate-scale quantum (NISQ) devices. In this work, we propose q-iPrune, a one-shot structured pruning framework grounded in the alg...
Quantum Error Mitigation with Attention Graph Transformers for Burgers Equation Solvers on NISQ Hardware
Seyed Mohamad Ali Tousi, Adib Bazgir, Yuwen Zhang +1 more·Dec 29, 2025
We present a hybrid quantum-classical framework augmented with learned error mitigation for solving the viscous Burgers equation on noisy intermediate-scale quantum (NISQ) hardware. Using the Cole-Hopf transformation, the nonlinear Burgers equation i...
Efficient simulation of logical magic state preparation protocols
Samyak Surti, Lucas Daguerre, Isaac H. Kim·Dec 29, 2025
Developing space- and time-efficient logical magic state preparation protocols will likely be an essential step towards building a large-scale fault-tolerant quantum computer. Motivated by this need, we introduce a scalable method for simulating logi...
DifGa: Differentiable Error Mitigation for Multi-Mode Gaussian and Non-Gaussian Noise in Quantum Photonic Circuits
Dennis Delali Kwesi Wayo, Rodrigo Alves Dias, Leonardo Goliatt +1 more·Dec 29, 2025
We introduce DifGa, a fully differentiable error-mitigation framework for continuous-variable (CV) quantum photonic circuits operating under Gaussian loss and weak non-Gaussian noise. The approach is demonstrated using analytic simulations with the d...
On the existence of the KMS spectral gap in Gaussian quantum Markov semigroups
Zheng Li·Dec 29, 2025
In arXiv:2405.04947, it was shown that the GNS spectral gap of a Gaussian quantum Markovian generator is strictly positive if and only if there exists a maximal number of linearly independent noise operators, under the assumption that the generated s...
Practical quantum teleportation with finite-energy codebooks
W. K. Yam, M. Renger, S. Gandorfer +2 more·Dec 29, 2025
Quantum communication exploits non-classical correlations to achieve efficient and unconditionally secure exchange of information. In particular, the quantum teleportation protocol allows for a deterministic and secure transfer of unknown quantum sta...
Novel qubits in hybrid semiconductor-superconductor nanostructures
Marta Pita-Vidal, Rubén Seoane Souto, Srijit Goswami +4 more·Dec 29, 2025
Hybrid semiconductor-superconductor qubits have recently emerged as a promising alternative to traditional platforms, combining material advantages with device-level tunability. A defining feature is their gate-tunable Josephson coupling, enabling su...
Towards a Faithful Quantumness Certification Functional for One-Dimensional Continuous-Variable Systems
Ole Steuernagel, Ray-Kuang Lee·Dec 29, 2025
If the phase space-based Glauber-Sudarshan distribution, $P_ρ$, has negative values the quantum state,~$ρ$, it describes is nonclassical. Due to $P$'s singular behaviour this simple criterion is impractical to use. Recent work [Bohmann and Agudelo, P...
Symmetry-Preserving Variational Quantum Simulation of the Heisenberg Spin Chain on Noisy Quantum Hardware
Rudraksh Sharma·Dec 28, 2025
Variational quantum algorithms are among the most promising approaches for simulating interacting quantum many-body systems on noisy intermediate-scale quantum (NISQ) devices. However, the practical success of variational quantum eigensolvers (VQE) c...
Error Resilience of Fracton Codes and Near Saturation of Code-Capacity Threshold in Three Dimensions
Giovanni Canossa, Lode Pollet, Miguel A. Martin-Delgado +2 more·Dec 28, 2025
Fracton codes have been intensively studied as novel topological states of matter, yet their fault-tolerant properties remain largely unexplored. Here, we investigate the optimal thresholds of self-dual fracton codes, in particular the checkerboard c...
Asymmetry effects in homodyne and heterodyne measurements: Positive operator-valued measures and asymptotic security of Gaussian continuous variable quantum key distribution
A. S. Naumchik, Roman K. Goncharov, Alexei D. Kiselev·Dec 27, 2025
We use the Gaussian approximation describing photocount statistics for both the homodyne and the double homodyne (heterodyne) measurements to study asymmetry effects arising from imbalance of the beam splitters and variations in quantum efficiencies ...
Modeling Noise in Quantum Computing of Scalar Convection
Jiahua Yang, Zhen Lu, Yue Yang·Dec 27, 2025
Quantum computing holds potential for accelerating the simulation of fluid dynamics. However, hardware noise in the noisy intermediate-scale quantum era significantly distorts simulation accuracy. Although error magnitudes are frequently quantified, ...
Experimental Joint Estimation of Phase and Phase Diffusion via Deterministic Bell Measurements
Ben Wang, Minghao Mi, Huangqiuchen Wang +2 more·Dec 27, 2025
Accurate phase estimation plays a pivotal role in quantum metrology, yet its precision is significantly affected by noise, particularly phase-diffusive noise caused by phase drift. To address this challenge, the joint estimation of phase and phase di...
Entanglement protection induced by mixed noise
Tengtao Guo, Yuxuan Zhou, Jiahui Feng +2 more·Dec 27, 2025
Contrary to the conventional view that noise is detrimental, we show that mixed noise can protect entanglement in a two-atom-cavity system. Specifically, the leakage of the cavity and the stochastic atom-cavity couplings are modeled as two types of n...
Operational entanglement of collective quantum modes at room temperature
Shalender Singh, Santosh Kumar·Dec 27, 2025
Quantum entanglement is commonly assumed to be fragile at ambient temperature and over macroscopic distances, where thermal noise and dissipation are expected to rapidly suppress nonclassical correlations. Here we show that this intuition fails for c...