Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Symmetry breaking transforms strong to normal correlation and false metals to true insulators
Alex Zunger, Jia-Xin Xiong, John P. Perdew·Dec 20, 2025
Material scientists and condensed matter physicists have long been divided on the issue of choosing the conceptual framework for explaining why open-shell transition-metal oxides tend to be insulators, whereas otherwise successful theories such as DF...
Benchmarking the Impact of Active Space Selection on the VQE Pipeline for Quantum Drug Discovery
Zhi Yin, Xiaoran Li, Zhupeng Han +6 more·Dec 20, 2025
Quantum computers promise scalable treatments of electronic structure, yet applying variational quantum eigensolvers (VQE) on realistic drug-like molecules remains constrained by the performance limitations of near-term quantum hardwares. A key strat...
High-Throughput Microwave Package for Precise Superconducting Device Measurement
Wei-Ren Syong, Allie Miller, Emma Davis +6 more·Dec 20, 2025
Cryogenic microwave measurement of superconducting quantum devices is complicated by the packaging required to connect devices to control and readout circuitry. In this work, we outline the design and experimental demonstration of a wirebond-free, PC...
Superconducting qubit decoherence correlated with detected radiation events
A. R. Castelli, K. M. Beck, L. D. H. Alegria +6 more·Dec 20, 2025
Most quantum error correction (QEC) protocols for superconducting qubits assume spatially and temporally uncorrelated decoherence events; however, recent evidence suggests that cosmic radiation induces spatially correlated errors. We present a platfo...
Lattice-Renormalized Tunneling Models for Superconducting Qubit Materials
P. G. Pritchard, James M. Rondinelli·Dec 20, 2025
We present a lattice-renormalized formalism for configurational tunneling two-level systems (TLS) that overcomes limitations of minimum-energy-path and light-particle models. Derived from the nuclear Hamiltonian, our formulation introduces composite ...
Crosstalk Dispersion and Spatial Scaling in Superconducting Qubit Arrays
Mohammed Alghadeer, Simon Pettersson Fors, Shuxiang Cao +5 more·Dec 20, 2025
Crosstalk between qubits fundamentally limits the scalability of quantum processors, necessitating physics-based models that can handle the complexity of large qubit arrays. Here, we develop a comprehensive theoretical and experimental framework that...
QLink: Quantum-Safe Bridge Architecture for Blockchain Interoperability
Joao Vitor Barros Da Silva, Arsh Gupta, Madhusudan Singh·Dec 20, 2025
Secure interoperability across heterogeneous blockchains remains one of the most pressing challenges in Web3 with existing bridge protocols vulnerable to both classical exploits and emerging quantum threats. This paper introduces QLink a quantum-safe...
Optimizing Epsilon Security Parameters in QKD
Alexander G. Mountogiannakis, Stefano Pirandola·Dec 19, 2025
We investigate the optimization of epsilon-security parameters in quantum key distribution (QKD), aiming to improve the achievable secure key rate under a fixed overall composable security level. For this purpose, we employ a continuous genetic algor...
Exploring polymer classification with a hybrid single-photon quantum approach
Alexandrina Stoyanova, Bogdan Penkovsky·Dec 19, 2025
Polymers exhibit complex architectures and diverse properties that place them at the center of contemporary research in chemistry and materials science. As conventional computational techniques, even multi-scale ones, struggle to capture this complex...
Quantum thermodynamics, quantum correlations and quantum coherence in accelerating Unruh-DeWitt detectors in both steady and dynamical state
Omar Bachain, Mohamed Amazioug, Rachid Ahl Laamara·Dec 19, 2025
We investigate the interplay between quantum thermodynamics, quantum correlations, and quantum coherence within the framework of the Unruh-DeWitt (UdW) detector model. By analyzing both the steady and dynamical states of various quantum resources (in...
The CHSH Game, Tsirelson's Bound, and Causal Locality
Jacob A. Barandes, Mahmudul Hasan, David Kagan·Dec 19, 2025
We reformulate the CHSH game in terms of indivisible stochastic processes. Using Barandes's stochastic-quantum correspondence and its associated definition of causal locality, we present a novel proof of the Tsirelson bound. In particular, we show th...
Composable, unconditional security without a Quantum secret key: public broadcast channels and their conceptualizations, adaptive bit transmission rates, fidelity pruning under wiretaps
Pete Rigas·Dec 19, 2025
We examine public broadcast, forward conceptual, and backward conceptual, Quantum channels in the context of communication protocols that are independent of secret keys. Given research directions of interest previously identified in arXiv: 1804.01797...
Loschmidt Echo and Classicality of the Gamma Model
Gilson V. Soares, Mauricio Reis, Adelcio C. Oliveira·Dec 19, 2025
The classicality of the Gamma Model, an analytically solvable quantum oscillator with non-linear dynamics, is investigated using the overlap dynamics, also known as the Loschmidt Echo, and roughness, a classicality measure based on the Wigner represe...
Simulation of depolarizing channel exploring maximally non separable spin-orbit mode
G. Tiago, V. S. Lamego, M. H. M. Passos +2 more·Dec 19, 2025
The Depolarizing channel is one of the most important noise models and constitutes a reliable benchmark for the quantum information field. In this work, we present a simple way to emulate a Depolarizing channel by exploring a maximally non separable ...
Optimization of Si/SiGe Heterostructures for Large and Robust Valley Splitting in Silicon Qubits
Abel Thayil, Lasse Ermoneit, Lars R. Schreiber +2 more·Dec 19, 2025
The notoriously low and fluctuating valley splitting is one of the key challenges for electron spin qubits in silicon (Si), limiting the scalability of Si-based quantum processors. In silicon-germanium (SiGe) heterostructures, the problem can be addr...
Quantum simulation of deep inelastic scattering in the Schwinger model
Kazuki Ikeda, Zhong-Bo Kang, Dmitri E. Kharzeev +1 more·Dec 19, 2025
Hadronic tensors encode the nonperturbative structure of hadrons probed in deep inelastic scattering (DIS), yet their direct evaluation requires real-time evolution that presents a challenge for traditional Euclidean lattice approaches. In this work,...
Correcting quantum errors one gradient step at a time
Manav Seksaria, Anil Prabhakar·Dec 19, 2025
In this work, we introduce a general, gradient-based method that optimises codewords for a given noise channel and fixed recovery. We do so by differentiating fidelity and descending on the complex coefficients using finite-difference Wirtinger gradi...
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}(...
Stability studies on subtractively-fabricated CMOS-compatible superconducting transmon qubits
Chawki Dhieb, Johannes Weber, Samuel Taubenberger +12 more·Dec 19, 2025
Developing fault-tolerant quantum processors with error correction demands large arrays of physical qubits whose key performance metrics (coherence times, control fidelities) must remain within specifications over both short and long timescales. Here...
Shuttling Compiler for Trapped-Ion Quantum Computers Based on Large Language Models
Fabian Kreppel, Reza Salkhordeh, Ferdinand Schmidt-Kaler +1 more·Dec 19, 2025
Trapped-ion quantum computers based on segmented traps rely on shuttling operations to establish long-range connectivity between sub-registers. Qubit routing dynamically reconfigures qubit positions so that all qubits involved in a gate operation are...