Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Directional telecom photons from a chirally coupled quantum dot
Kristina Bodiroga, Jacob Ewaniuk, Andrew N. Wakileh +7 more·Jul 23, 2026
Chiral quantum light-matter interfaces, where the internal spin state of a quantum emitter determines the direction in which it emits, are essential building blocks of non-reciprocal quantum devices, deterministic quantum logical gates and entangleme...
QuantumChain: Blockchain-Backed Quantum Federated Learning for Financial Fraud Detection
Epameinondas Douros, Konstantinos Dalampekis, Nouhaila Innan +2 more·Jul 23, 2026
Financial fraud detection is challenged by decentralized data, severe class imbalance, and privacy constraints. This paper presents QuantumChain, a secure Quantum Federated Learning (QFL) framework that combines hybrid quantum-classical neural networ...
Exponentially enhanced two-mode multiboson entanglement via phase-modulated tunneling
Pritam Chattopadhyay, A. G. Kofman, Gershon Kurizki·Jul 23, 2026
The entanglement of quantum systems is commonly restricted by their coupling Hamiltonian and initial state properties. Here, we prove by exact analysis of tunnel-coupled bosonic field modes, that factorized multi-boson two-mode states can become full...
QSTAR: Quantum Selective Transfer with Adaptive Routing
Saim Rehman, Nouhaila Innan, Muhammad Shafique·Jul 23, 2026
Quantum transfer learning (QTL) is often evaluated by replacing a classical classifier with a fixed variational quantum head, but this hides a key question: when is the quantum branch actually useful? We propose QSTAR: Quantum Selective Transfer with...
Cautious optimism for deep parameterized quantum circuits
Marie Kempkes, Elies Gil-Fuster, Carlos Bravo-Prieto +5 more·Jul 23, 2026
A central challenge in quantum machine learning is understanding the scaling behavior of parameterized quantum circuits (PQCs). In particular, it remains unclear how their performance on unseen data changes as the number of trainable parameters incre...
Towards more accurate natural orbital functional approximations: including 4-index cumulant contributions
Valerii Chuiko, Paul W. Ayers, Eduard Matito·Jul 23, 2026
Accurate modeling of bond breaking remains a central challenge for reduced density matrix functional theory (RDMFT). Although some modern functionals can yield reasonably accurate dissociation energies, they often fail to reproduce key properties of ...
A solution to 2-copy distillability of Werner states
Jinshi Fu, Li Gao, Sang-Jun Park·Jul 23, 2026
Entanglement distillation is a fundamental task in quantum information theory. In this work, we prove that Werner states in arbitrary dimension are 2-copy distillable if and only if they are 1-copy distillable. This answers the longstanding open ques...
Floquet Reservoir Engineering for Remote Logical Entanglement
Mingxing Yao, Aashish A. Clerk·Jul 23, 2026
Implementing controlled dissipative dynamics is a powerful approach for state preparation in a variety of contexts, including the preparation of remote entangled states. Here, we show that by going beyond the standard setting of time-independent diss...
Efficient classical simulation of large-scale unitary cluster Jastrow circuits
Hrishikesh Belagali, Thomas Van Camp, R. Pradeep +3 more·Jul 23, 2026
Recent experiments on quantum computers have challenged the limits of classical computation in chemistry, simulating ground states of strongly correlated molecules. Many of these experiments have utilized the unitary cluster Jastrow ansatz, a quantum...
Quasiparticle-induced transitions in a fluxonium qubit
Maksim Litskevich, Kesavan Manivannan, Benjamin Byrd +4 more·Jul 23, 2026
Quasiparticles are a prominent decoherence source in superconducting qubits, but their effects are notoriously difficult to isolate in fluxonium. Unlike a transmon, fluxonium is insensitive to offset charge, precluding charge-parity detection of quas...
Scaling Up Formal Representation of Clinical Trial Protocols in Ensemble Logic Using LLMs: A Preliminary Study
Yan Huang, Xubing Hao, Xiaojin Li +4 more·Jul 23, 2026
The reliance on unstructured free text for documenting clinical trial protocols creates a significant barrier to automated reasoning, cohort discovery, and trial simulation. The lack of formal structure obscures critical temporal phenotypes, such as ...
Classifying Topology via Edge-State Pure Thermalization
Fatih Ozaydin, Haydar Sahin, Armando Perez-Leija +4 more·Jul 23, 2026
Repeated-interaction machines distinguish heat-like from work-like resources through the steady states they generate, but whether topology can control this distinction remains unknown. Here we reveal the role of topology in the process by showing tha...
Fluctuation-Induced Bistability in the Dissipative Dynamics of Generic Cavity-Matter Quantum Systems
Luisa Tolle, Simon B. Jäger, Ameneh Sheikhan +2 more·Jul 23, 2026
We demonstrate that fluctuation-induced bistability is a robust and generic phenomenon in strongly interacting many-body systems with strong light-matter coupling. We identify a common microscopic mechanism based on resonances between photonic transi...
Device-Independent Self-Testing of the Three-Qubit CCZ Hypergraph State
Yunguang Han, Xin Kuang, Xingyuan Bu +1 more·Jul 23, 2026
The three-qubit CCZ state is the smallest rank-three hypergraph state and an elementary entangled magic resource. Its cubic phase is governed by generalized stabilizers that are not Pauli strings, so standard graph-state self-testing arguments do not...
Mixed-Binary Quadratic Programming via QUBO Sampling without Continuous-Variable Binarization
Taisei Takabayashi, Masayuki Ohzeki·Jul 23, 2026
Quantum annealing and related combinatorial optimization methods typically accept quadratic unconstrained binary optimization (QUBO) problems as input, whereas many practical models include constraints and continuous variables. Standard QUBO conversi...
Representation of the causal logic for the Dirac system and the electron
Domenico P. L. Castrigiano, Carmine De Rosa, Valter Moretti·Jul 23, 2026
We construct a covariant representation of the causal logic for the Dirac system and the electron, based on the conserved Dirac probability current and a general current-to-localization procedure for achronal regions. A polynomial decay estimate, der...
Space-division multiplexed quantum key distribution exploiting multi-plane light conversion for few-mode fibers
Qian Zhang, Stefan Krause, Felix Kunzmann +1 more·Jul 23, 2026
As quantum key distribution (QKD) progresses from laboratory demonstrations toward practical deployment, quantum communi- cation networks increasingly require higher key rates and the ability to distribute independent secret keys among multiple users...
Tailoring optical Schrödinger cat states via orientation-dependent high-harmonic generation in $\rm{H}_2^+$
Ziyang Gan, Wei-Chao Jiang, Ahai Chen +1 more·Jul 23, 2026
We theoretically demonstrate that the molecular orientation angle $θ$ provides a structurally intrinsic, continuously tunable control parameter for engineering optical Schrödinger cat states via high-harmonic generation (HHG) in H$_2^+$. Coupling tim...
Why Some Quantum States Cannot Be Recovered
Yuan Liu, Linhan Lin, Ke-Mi Xu·Jul 23, 2026
The recovery of quantum information after subsystem loss is a central challenge in quantum information processing. However, some states remain beyond the reach of any recovery strategies. Here we identify the algebraic origin of irrecoverability, the...
Entanglement asymmetry and quantum Mpemba effect for Kramers-Wannier duality
Milo Vescovo, Pasquale Calabrese, Filiberto Ares·Jul 23, 2026
The Kramers-Wannier duality is the prototypical example of a non-invertible symmetry, yet little is known about its fate away from criticality and out of equilibrium. We introduce the Kramers-Wannier entanglement asymmetry, a quantum-information meas...