Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Spinor Double-Quantum Excitation in the Solution NMR of Near-Equivalent Spin-1/2 Pairs
Urvashi D. Heramun, Mohamed Sabba, Dolnapa Yamano +5 more·Feb 8, 2026
A family of double-quantum excitation schemes is described for the solution nuclear magnetic resonance (NMR) of near-equivalent spin-1/2 pairs. These new methods exploit the spinor behaviour of 2-level systems, whose signature is the change of sign o...
Improved entanglement-based high-dimensional optical quantum computation with linear optics
Huan-Chao Gao, Guo-Zhu Song, Hai-Rui Wei·Feb 8, 2026
Quantum gates are the essential block for quantum computer. High-dimensional quantum gates exhibit remarkable advantages over their two-dimensional counterparts for some quantum information processing tasks. Here we present a family of entanglement-b...
A gravitationally induced decoherence model for photons in the context of the relational formalism
Max Joseph Fahn, Kristina Giesel, Roman Kemper·Feb 7, 2026
We formulate a model of gravitationally induced decoherence for photons starting from Maxwell theory coupled to linearised gravity, expressed in terms of Ashtekar-Barbero variables and treated as an open quantum field theoretic system. In contrast to...
Turning non-superconducting elements into superconductors by quantum confinement and proximity
Giovanni A. Ummarino, Alessio Zaccone·Feb 7, 2026
Elemental good metals, including noble metals (Cu, Ag, Au) and several $s$-block elements, do not exhibit superconductivity in bulk at ambient pressure, mainly due to weak electron-phonon coupling that cannot overcome Coulomb repulsion. Quantum confi...
Structural Theory of Information Backflow in Non-Markovian Relaxation: TC/TCL Formalism and Minimal Phase Diagrams
Koichi Nakagawa·Feb 7, 2026
We develop a structural theory of information backflow in minimal non-Markovian relaxation processes within the framework of nonequilibrium statistical mechanics. The approach is based on the time-convolution (TC) and time-convolutionless (TCL) proje...
Quantum Many-Body Principles of Localized-State Ensemble Luminescence
Xinye Fan, Shijie Xu·Feb 7, 2026
Localized electron states induced by various disorders,including defects and impurities,usually exist in solids.Their optical properties,especially their luminescence properties,are of both scientific and technological significance.But a microscopic ...
Non-Hermitian physics in the many-body system of Rydberg atoms
Ya-Jun Wang, Jun Zhang, Dong-Sheng Ding·Feb 7, 2026
Non-Hermitian physics exhibits unique physical properties beyond those of traditional Hermitian systems, such as symmetry breaking, the emergence of exceptional points, topological phase transitions, and more. These phenomena have been extensively st...
Miniaturised multi-plane light converters via laser-written geometric phase holograms
Unė G. Būtaitė, Martynas Beresna, David B. Phillips·Feb 6, 2026
Multi-plane light converters (MPLCs) are an emerging 3D beam shaping technology capable of deterministically mapping a basis of input spatial light modes to a new basis of output modes. The ability to perform such spatial reformatting operations has ...
Zero-point energy of solids from vacuum fluctuation and quantum geometric force
Yugo Onishi, Liang Fu·Feb 6, 2026
We show that quantum fluctuations of electromagnetic fields induce an additional zero-point energy in solids, which scales with the volume. For insulators, the zero-point energy density is proportional to quantum fluctuation of electric polarization ...
Quasiperiodic nondipole ionization dynamics in the x-ray stabilization regime
Aleksandr V. Boitsov, Karen Z. Hatsagortsyan, Christoph H. Keitel·Feb 6, 2026
Recent advances in strong x-ray laser techniques enable the study of nonlinear multiphoton ionization in extreme high-frequency fields. Although the stabilization regime in such fields is theoretically established, its modified properties in the nond...
Disentanglement by means of action-induced representations
Gorka Muñoz-Gil, Hendrik Poulsen Nautrup, Arunava Majumder +4 more·Feb 6, 2026
Learning interpretable representations with variational autoencoders (VAEs) is a major goal of representation learning. The main challenge lies in obtaining disentangled representations, where each latent dimension corresponds to a distinct generativ...
Normal mode splitting induced synchronization blockade in coupled quantum van der Pol oscillators
Nissi Thomas, M. Senthilvelan·Feb 6, 2026
We report a normal-mode induced synchronization blockade in coupled quantum van der Pol oscillators under the influence of external drive. In this mechanism, the coupling hybridizes the oscillator modes into spectrally split normal modes. The destruc...
High-speed phase-encoded quantum secure direct communication over 11.4 km heterogeneous free-space and fiber links
Ze-Zhou Sun, Yuan-Bin Cheng, Yu-Chen Liu +5 more·Feb 6, 2026
Robust quantum transmission is driving a new paradigm in space-ground quantum networking. Although phase encoding has been widely adopted in terrestrial fiber channels, it has long been considered unsuitable for free-space quantum communication. Here...
Characterizing Quantum Error Correction Performance of Radiation-induced Errors
Paul G. Baity, Anuj K. Nayak, Lav R. Varshney +4 more·Feb 5, 2026
Radiation impacts are a current challenge with computing on superconducting-based quantum devices because they can lead to widespread correlated errors across the device. Such errors can be problematic for quantum error correction (QEC) codes, which ...
Quantum noise scaling in continuously operating multiparameter sensors
Aleksandra Sierant, Diana Méndez-Avalos, Santiago Tabares Giraldo +1 more·Feb 5, 2026
We experimentally investigate the quantum noise mechanisms that limit continuously operating multiparameter quantum sensors. Using a hybrid rf-dc optically pumped magnetometer, we map the photon shot noise, spin projection noise, and measurement back...
An Approach to Probing Particles and Quasi-particles in the Condensed Bose-Hubbard Model
Huy Nguyen, Yu-Xin Wang, Jacob M. Taylor·Feb 5, 2026
Measurement plays a crucial role in a quantum system beyond just learning about the system state: it changes the post-measurement state and hence influences the subsequent time evolution; further, measurement can even create entanglement in the post-...
Local measurements and the entanglement transition in quantum spin chains
Sven Bachmann, Mahsa Rahnama, Gabrielle Tournaire·Feb 5, 2026
We consider the transition between short-range entangled (SRE) and long-range ordered (and therefore long-range entangled) states of infinite quantum spin chains, which is induced by local measurements. Specifically, we assume that the initial state ...
Spontaneous Parity Breaking in Quantum Antiferromagnets on the Triangular Lattice
Songtai Lv, Yuchen Meng, Haiyuan Zou·Feb 5, 2026
Frustration on the triangular lattice has long been a source of intriguing and often debated phases in many-body systems. Although symmetry analysis has been employed, the role of the seemingly trivial parity symmetry has received little attention. I...
Assessing the Sensitivity of Niobium- and Tantalum-Based Superconducting Qubits to Infrared Radiation
Michael Kerschbaum, Felix Wagner, Uroš Ognjanović +7 more·Feb 5, 2026
The use of tantalum films for superconducting qubits has recently extended qubit coherence times significantly, primarily due to reduced dielectric losses at the metal-air interface. However, the choice of base material also influences the sensitivit...
Investigations on Quantum Correlations and Open Quantum System Dynamics Through Nuclear Spins
Arijit Chatterjee·Feb 5, 2026
Nuclear spins provide an ideal platform for studying quantum correlations and open quantum system dynamics across diverse areas, including quantum information, quantum foundations, and many-body physics. This is enabled by their long longitudinal (T1...