Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Communicating Properties of Quantum States over Classical Noisy Channels
Nikhitha Nunavath, Jiechen Chen, Osvaldo Simeone +2 more·Dec 4, 2025
Transmitting information about quantum states over classical noisy channels is an important problem with applications to science, computing, and sensing. This task, however, poses fundamental challenges due to the exponential scaling of state space w...
PVLS: A Learning-based Parameter Prediction Technique for Variational Quantum Linear Solvers
Youla Yang·Dec 4, 2025
Variational Quantum Linear Solvers (VQLS) are a promising method for solving linear systems on near-term quantum devices. However, their performance is often limited by barren plateaus and inefficient parameter initialization, which significantly hin...
Instantons meet resonances: Unifying two seemingly distinct approaches to quantum tunneling
Björn Garbrecht, Nils Wagner·Dec 4, 2025
In the study of quantum-mechanical tunneling processes, numerous approaches have been developed to determine the decay rate of states initially confined within a metastable potential region. Virtually all analytical treatments, however, fall into one...
Multiphoton interference outperforms pairwise overlaps for distinguishability characterization
S. N. van den Hoven, M. C. Anguita, S. Marzban +1 more·Dec 4, 2025
We propose a protocol that characterizes the pairwise overlaps of the internal modes of single photons more efficiently than pairwise Hong-Ou-Mandel characterization experiments. This protocol exploits multiphoton interference. We experimentally impl...
Bayesian stepwise estimation of qubit rotations
Mylenne Manrique, Marco Barbieri, Assunta Di Vizio +4 more·Dec 4, 2025
This work investigates Bayesian stepwise estimation (Se) for measuring the two parameters of a unitary qubit rotation. While asymptotic analysis predicts a precision advantage for SE over joint estimation (JE) in regimes where the quantum Fisher info...
Mitigating Residual Exchange Coupling in Resonant Singlet-Triplet Qubits
Jiheng Duan, Fernando Torres-Leal, John M. Nichol·Dec 4, 2025
We propose methods to mitigate single- and two-qubit control errors due to residual exchange coupling in systems of exchange-coupled resonant singlet-triplet qubits. Commensurate driving, where the pulse length is an integer multiple of the drive per...
Hybrid VQE-CVQE algorithm using diabatic state preparation
John P. T. Stenger, C. Stephen Hellberg, Daniel Gunlycke·Dec 4, 2025
We propose a hybrid variational quantum algorithm that has variational parameters used by both the quantum circuit and the subsequent classical optimization. Similar to the Variational Quantum Eigensolver (VQE), this algorithm applies a parameterized...
From Kinematics to Interference: Operational Requirements for the Quantum Principle of Relativity
Mikołaj Sienicki, Krzysztof Sienicki·Dec 4, 2025
The quantum principle of relativity (QPR) puts forward an ambitious idea: extend special relativity with a formally superluminal branch of Lorentz-type maps, and treat the resulting consistency constraints as hints about why quantum theory has the st...
A quantitative Hohenberg-Kohn theorem and the unexpected regularity of density functional theory in one spatial dimension
Thiago Carvalho Corso, Andre Laestadius·Dec 4, 2025
In this paper we investigate the (Kohn-Sham) density-to-potential map in the case of spinless fermions in one spatial dimension, whose existence has been rigorously established by the first author in [arXiv:2504.05501 (2025)]. Here, we focus on the r...
Quantum-Inspired Optimization through Qudit-Based Imaginary Time Evolution
Erik M. Åsgrim, Ahsan Javed Awan·Dec 4, 2025
Imaginary-time evolution has been shown to be a promising framework for tackling combinatorial optimization problems on quantum hardware. In this work, we propose a classical quantum-inspired strategy for solving combinatorial optimization problems w...
Robust, fast, and efficient formation of stable tetratomic molecules from ultracold atoms via generalized stimulated Raman exact passage
Jia-Hui Zhang, Wen-Yuan Wang, Fu-Quan Dou·Dec 4, 2025
The study of the conversion of ultracold atoms into molecules has long remained a hot topic in atomic, molecular, and optical physics. However, most prior research has focused on diatomic molecules, with relatively scarce exploration of polyatomic mo...
Watt-level coherent microwave emission from dissipation engineered solid-state quantum batteries
Yuanjin Wang, Hao Wu, Mark Oxborrow +1 more·Dec 4, 2025
Recently proposed metastability-induced quantum batteries have shown particular promise for coherent microwave generation. However, achieving high-power coherent microwave generation in quantum batteries remains fundamentally challenging due to quant...
Fermionic neural Gibbs states
Jannes Nys, Juan Carrasquilla·Dec 4, 2025
We introduce fermionic neural Gibbs states (fNGS), a variational framework for modeling finite-temperature properties of strongly interacting fermions. fNGS starts from a reference mean-field thermofield-double state and uses neural-network transform...
Collective cluster nucleation dynamics in quantum magnets
Philip Osterholz, Fabio Bensch, Shuanghong Tang +4 more·Dec 4, 2025
Strongly interacting many-body systems exhibit collective properties that emerge from complex correlations among microscopic degrees of freedom. These cooperative phenomena govern the non-equilibrium response of quantum systems, with relevance rangin...
Probing chiral topological states with permutation defects
Yarden Sheffer, Ruihua Fan, Ady Stern +2 more·Dec 4, 2025
The hallmark of two-dimensional chiral topological phases is the existence of anomalous gapless modes at the spatial boundary. Yet, the manifestation of this edge anomaly within the bulk ground-state wavefunction itself remains only partially underst...
Probing False Vacuum Decay and Bubble Nucleation in a Rydberg Atom Array
Yu-Xin Chao, Peiyun Ge, Zhen-Xing Hua +8 more·Dec 4, 2025
In quantum field theory (QFT), the "vacuum" is not just empty space but the lowest-energy state of a quantum field. If the energy landscape has multiple local minima, the local ground states are the false vacuum (FV) which can tunnel towards the glob...
Ground state energy and phase transitions of Long-range XXZ using VQE
Mrinal Dev, Shraddha Sharma·Dec 4, 2025
The variational quantum eigen solver (VQE), has been widely used to find the ground state energy of different Hamiltonians with no analytical solutions and are classically difficult to compute. In our work, we have used VQE to identify the phase tran...
Phase noise characterisation of a 2-km Hollow-Core Nested Antiresonant Nodeless Fibre for Twin-Field Quantum Key Distribution
Mariella Minder, Sophie Albosh, Obada Alia +5 more·Dec 4, 2025
The performance of quantum key distribution (QKD) is heavily dependent on the physical properties of the channel over which it is executed. Propagation losses and perturbations in the encoded photons' degrees of freedom, such as polarisation or phase...
Supramolecular approach-based intermolecular interaction energy calculations using quantum phase estimation algorithm
Yuhei Tachi, Akihiko Arakawa, Taisei Osawa +2 more·Dec 4, 2025
Accurate computation of non-covalent, intermolecular interaction energies is important to understand various chemical phenomena, and quantum computers are anticipated to accelerate it. Although the state-of-the-art quantum computers are still noisy a...
A Qudit-native Framework for Discrete Time Crystals
Wei-Guo Ma, Heng Fan, Shi-Xin Zhang·Dec 4, 2025
We introduce a qudit-native framework for engineering robust discrete time crystals (DTCs) by leveraging their internal multilevel structure. Our approach confines the periodic drive to specified on-site subspaces, creating an embedded kick that supp...