Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Impossibility of superluminal signalling rules out causal loops in conical spacetimes
Maarten Grothus, V. Vilasini·Jun 18, 2026
In PRL 129, 110401 it was shown that it is theoretically possible to have operationally detectable causal loops without violating the principle of no superluminal signalling (NSS) in (1+1)-Minkowski spacetime. Whether or not such causal loops are als...
Many-body chirality of topological stabilizer states
Tyler D. Ellison, Dongjin Lee, Zhi Li +3 more·Jun 18, 2026
A defining feature of chirality is the distinction between a system and its mirror image. Despite extensive experimental observations of chiral phases and theoretical advances, a quantum-information theoretic characterization of chirality based solel...
Space-time duality approach to (inhomogeneous) integrable quenches
Riccardo Travaglino, Pasquale Calabrese, Katja Klobas +1 more·Jun 18, 2026
Characterising the universal aspects of non-equilibrium quantum many-body dynamics is one of the key goals of this century's physics research. Progress, however, is hindered by the lack of general theoretical frameworks for studying interacting quant...
Computing noise-canceling observables via Pauli propagation
Andrew Eddins, Caleb Johnson, Alberto Baiardi +8 more·Jun 18, 2026
The pursuit of quantum advantage is driving the co-evolution of quantum processors and classical simulation methods. Despite advances in scale and quality, the accuracy of quantum simulation is ultimately limited by error rates and sampling overheads...
Eigenvector Varieties
Sandra Di Rocco, Bernd Sturmfels, Svala Sverrisdóttir·Jun 18, 2026
Any linear space of square matrices has an associated eigenvector variety. Its points are eigenvectors of matrices from that linear space. We present a systematic study of eigenvector varieties, with focus on Lie algebras and Hamiltonians of quantum ...
Quantum Kernels are Spectral Tensor Networks
Erik M. Åsgrim, Stefano Markidis·Jun 18, 2026
Quantum kernels admit Fourier representations whose frequencies are determined by the data-encoding gates of the underlying feature map. We show that entangling tensor kernels are matrix product operator factorizations of the corresponding Fourier co...
Faking entanglement with imperceptible measurement deviations
Jaime Moreno, Elna Svegborn, Simon Morelli +4 more·Jun 18, 2026
Quantum entanglement is a central resource underpinning emerging quantum technologies, enabling capabilities beyond those of classical systems. Accurate verification of entanglement is therefore crucial. However, experimental schemes usually rely on ...
Interaction geometry and ground-state properties of sparse quantum lattice models
Alex Gunning, Sebastian Schmid, Zhengxiao Liu +3 more·Jun 18, 2026
We investigate how interaction geometry shapes the low-energy phases of sparse tunable long-range quantum models. We focus on a class of graphs whose degree grows logarithmically with system size, and show how symmetry and frustration in graph connec...
Sparse Configuration Interaction for the Electronic Schrödinger Equation Revisited: Complete Basis Set Limit Complexity and Quantum-Encoding Impact
Michael Griebel, Jan Hamaekers·Jun 18, 2026
In this article we revisit regularity results for eigenfunctions in the discrete spectrum of the electronic Schrödinger equation and study their consequences for approximation complexity. In particular, for the convergence to the complete basis set l...
Discrimination of genuinely nonlocal sets without entanglement in multipartite systems
Ziying Hou, Huaqi Zhou, Limin Gao·Jun 18, 2026
Genuine nonlocality arises when a set of multipartite orthogonal states is locally indistinguishable under any bipartition of the subsystems. The entanglement-assisted discrimination of such genuinely nonlocal orthogonal product sets has attracted si...
Attosecond Path Qubits in High-Harmonic Generation: Classical Dephasing and Trace-Out Decoherence
A. Marchisio, C. Granados, M. F. Ciappina +1 more·Jun 18, 2026
High-harmonic generation (HHG) is governed by interference between electron trajectories. We propose that the dominant short and long trajectories define an experimentally addressable two-level subsystem: an attosecond path qubit (APQ). We formulate ...
Effective discrete-modulated continuous variable QKD under general attacks
Mariana Navarro, Antonio Acín, Carlos Pascual-García·Jun 18, 2026
Continuous variable quantum key distribution via discrete modulations ensures information-theoretic security using standard telecom technologies, providing affordable and scalable quantum communications with simplified classical postprocessing. Howev...
Quantum ring all-reduce: communication and privacy advantages for distributed learning
María Gragera Garcés, Lirandë Pira·Jun 18, 2026
Machine learning models have scaled to unprecedented sizes, making training across distributed devices the de facto standard in the field. In this work, we explore how quantum communications can make distributed training both more communication-effic...
Phase locking nuclear spins in silicon with spin-orbit coupling
Habitamu Y. Walelign, Manas Ranjan Sahu, John M. Nichol·Jun 18, 2026
Because they have such long coherence times, nuclear spins have extraordinary potential for use in quantum information processing devices. However, coherent nuclear spin control generally requires external phase references, such as microwave control ...
Observation of alignment tensor effects in metastability-exchange collisions with highly polarized 3He ensembles
Yida Sha, Kaiwen Yi, Xingqing Jin +2 more·Jun 18, 2026
Highly polarized 3He ensembles prepared by metastability-exchange optical pumping (MEOP) have been widely used in precision measurements and fundamental physics. Metastability-exchange (ME) collisions, serving as the basis of MEOP, are traditionally ...
Effective Faraday interaction between light and Helium-3 nuclear spins in a multi-pass cell
Kaiwen Yi, Yida Sha, Zejia Lin +2 more·Jun 18, 2026
Helium-3 nuclear spins form an exceptionally stable quantum system with extremely long coherence time, offering exciting opportunities for quantum technologies. In particular, nuclear spin-squeezed states promise enhanced precision for sensing tasks ...
Exploiting More Than Symmetry in Variational Quantum Machine Learning
Markus Baumann, Claudia Linnhoff-Popien·Jun 18, 2026
The success of variational quantum learning models crucially depends on choosing parametrizations that reflect the structure of the problem at hand. Symmetries provide one of the clearest such structures: whenever transformations of the input leave t...
Entanglement structure of the dynamical phases in the sub-Ohmic spin-boson model
Cunxi Gong, Zirui Sheng, Weitang Li·Jun 18, 2026
The sub-Ohmic spin-boson model exhibits three distinct dynamical regimes in its spin population dynamics, classified as coherent, incoherent, and pseudo-coherent. Whether these regimes correspond to distinct spin-bath entanglement structures remains ...
Quantum Batteries as Work Sources for Phase-Locked Parametric Amplification
Borhan Ahmadi·Jun 18, 2026
Quantum batteries have been proposed as locally precharged work sources for superconducting quantum technologies, suggesting a route to reduce continuously supplied microwave drives. Here we ask whether the pump tone of a quantum-limited parametric a...
Arrival times of an atomic Bose-Einstein condensate
Pascal Naidon, Lucas Happ, Denis Boiron·Jun 18, 2026
The times of flight of an atomic Bose-Einstein condensate are theoretically investigated in the experimentally unexplored regime corresponding to detection close to the trap of the condensate. In this regime, there is no consensus on how to calculate...