Papers
Locked Subharmonic Oscillations in the Entanglement Spectrum of a Periodically Driven Topological Chain
Rishabh Jha·Apr 8, 2026
Periodically driven quantum systems can exhibit subharmonic response, usually characterized through physical observables and often discussed in interacting settings. Here we show that a sharp subharmonic signature already appears in the entanglement ...
Observation of genuine $2+1$D string dynamics in a U$(1)$ lattice gauge theory with a tunable plaquette term on a trapped-ion quantum computer
Rohan Joshi, Yizhuo Tian, Kevin Hemery +5 more·Apr 8, 2026
Quantum simulations of high-energy physics in $2+1$D can probe dynamical phenomena nonexistent in one spatial dimension and access regimes that are challenging for existing classical simulation methods. For string dynamics -- relevant to hadronizatio...
Observation of glueball excitations and string breaking in a $2+1$D $\mathbb{Z}_2$ lattice gauge theory on a trapped-ion quantum computer
Kaidi Xu, Umberto Borla, Kevin Hemery +4 more·Apr 8, 2026
A major goal of the quantum simulation of high-energy physics (HEP) is to probe real-time nonperturbative far-from-equilibrium quantum processes underlying phenomena such as hadronization in quantum chromodynamics (QCD). The quantum simulation of the...
Interaction-Mediated Non-Reciprocal Dynamics in Open Quantum Systems: From an Exactly Solvable Model to Generic Behavior
Pietro Borchia, Johannes Knolle, Andreas Nunnenkamp·Apr 8, 2026
Reservoir engineering has emerged as a powerful paradigm to realize non-reciprocal dynamics in open quantum many-body systems. Here, we show that density-density interactions can transfer bath-induced non-reciprocity between different degrees of free...
Rotation of the Transition Dipole in Single hBN Quantum Emitters via Vibronic Coupling
Serkan Paçal, Chanaprom Cholsuk, Mouli Hazra +4 more·Apr 8, 2026
The design of polarization-encoded quantum interfaces relies on the assumption that solid-state emitters possess static transition dipoles defined by the host lattice symmetry. Here, we demonstrate the vibronic breakdown of this static dipole approxi...
Comment on "Quantum theory based on real numbers cannot be experimentally falsified": On the compatibility of physical principles with information theory for fermions
Fatemeh Moradi Kalarde, Xiangling Xu, Marc-Olivier Renou·Apr 8, 2026
The manuscript [arXiv:2603.19208] proposes a physically motivated postulate to select the appropriate formulation of quantum theory over real Hilbert spaces, ruling out the theory considered in [Nature 600, 625-629 (2021)] in favour of the alternativ...
Groenewold-Moyal twists, integrable spin-chains and AdS/CFT
Riccardo Borsato, Miguel García Fernández·Apr 8, 2026
We take the first steps to address via integrability the spectral problem of AdS/CFT dual pairs deformed by Groenewold-Moyal twists. In particular, we start by considering a twisted spin-chain that couples, through a Groenewold-Moyal twist deformatio...
Physics-Informed Discrete-Event Simulation of Polarization-Encoded Quantum Networks
Abderrahim Amlou, Amar Abane, Cory M. Nunn +4 more·Apr 8, 2026
We extend the SeQUeNCe discrete-event simulator with physics-based models for polarization-encoded photonic quantum networks. Our framework integrates Jones-calculus optical components, including an SPDC Bell-state source, wave plates, and polarizing...
Two-dimensional shelving spectroscopy of ultraviolet ground state transitions in dysprosium
Kevin S. H. Ng, Paul Uerlings, Fiona Hellstern +5 more·Apr 8, 2026
The open inner-shell electronic structure of lanthanides with large magnetic moments gives rise to a rich spectrum of transitions available for laser cooling, trapping, and coherent control. Despite this, the large number of ultraviolet (UV) transiti...
Quantifying and detecting quantum-state texture
Xiangyu Chen, Qiang Lei·Apr 8, 2026
Quantum-state texture is a recently proposed quantum resource that characterizes the inhomogeneity of a quantum state's matrix element distribution in the computational basis, enriching our understanding of quantum state structure. To expand its quan...
Fock State Generation and SWAP using a Rabi-Driven Qubit
Natan Karaev, Eliya Blumenthal, Shay Hacohen-Gourgy·Apr 8, 2026
The deterministic generation and SWAP of Fock states in isolated high-Q modes form a core foundation for architectures in bosonic quantum computing. Conventionally, these operations necessitate strong coupling to a qubit, which inherently compromises...
Improving Feasibility in Quantum Approximate Optimization Algorithm for Vehicle Routing via Constraint-Aware Initialization and Hybrid XY-X Mixing
Yuan-Zheng Lei, Yaobang Gong, Xianfeng Terry Yang +1 more·Apr 8, 2026
The Quantum Approximate Optimization Algorithm (QAOA) is a leading framework for quantum combinatorial optimization. The Vehicle Routing Problem (VRP), a core problem in logistics and transportation, is a natural application target, but it poses a ma...
Quantum Gibbs sampling through the detectability lemma
Di Fang, Jianfeng Lu, Yu Tong +1 more·Apr 8, 2026
Gibbs state preparation is an important subroutine in quantum computing. In this work we use the detectability lemma to improve Gibbs state preparation. Specifically, we design new Gibbs state preparation methods that do not rely on simulating Lindbl...
Defect-free arrays at the thousand-atom scale in a 4-K cryogenic environment
Desiree Lim, Hadriel Mamann, Grégoire Pichard +18 more·Apr 8, 2026
We report on a cryogenic platform at 4 K incorporating high numerical aperture optics for the generation of large-scale tweezers arrays, and compatible with Rydberg-state manipulation. We achieve trapping lifetimes of around 5000 s, significantly ext...
Beyond the Mean: Modelling Annotation Distributions in Continuous Affect Prediction
Kosmas Pinitas, Ilias Maglogiannis·Apr 8, 2026
Emotion annotation is inherently subjective and cognitively demanding, producing signals that reflect diverse perceptions across annotators rather than a single ground truth. In continuous affect prediction, this variability is typically collapsed in...
LaScA: Language-Conditioned Scalable Modelling of Affective Dynamics
Kosmas Pinitas, Ilias Maglogiannis·Apr 8, 2026
Predicting affect in unconstrained environments remains a fundamental challenge in human-centered AI. While deep neural embeddings dominate contemporary approaches, they often lack interpretability and limit expert-driven refinement. We propose a nov...
On the Computational Complexity of Geometrically Local QAC0 circuits
Yangjing Dong, Fengning Ou, Penghui Yao·Apr 8, 2026
The computational complexity of $\mathsf{QAC}^0$, which are constant-depth, polynomial-size quantum circuit families consisting of arbitrary single-qubit unitaries and $n$-qubit generalized Toffoli gates, has gained tremendous focus recently. In this...
Robust and High-Fidelity Controlled Two-Qubit Gates via Asymmetric Parallel Resonant Excitation
Licheng Lin, Jize Han, Peng Zhu +4 more·Apr 8, 2026
Implementing high-fidelity controlled two-qubit gates in dipole-dipole interacting systems, such as rare-earth-ion crystals, in hindered by spectral inhomogeneity and weak coupling. Existing method often rely on detuned pulses, making them susceptibl...
Overlapped groupings for quantum energy estimation: Maximal variance reduction and deterministic algorithms for reducing variance
Jeremiah Rowland, Rahul Sarkar, Nicolas PD Sawaya +2 more·Apr 8, 2026
Grouping-based measurement strategies are widely used to reduce measurement complexity in near-term quantum algorithms. While these schemes have typically produced disjoint groups, recently this has been relaxed in what is known as overlapped groupin...
Borns Rule from Reversible Evolution and Irreversible Outcomes
Oskar Axelsson·Apr 8, 2026
We show that the quadratic measure need not be postulated, but follows from the compatibility of two structural features of physical processes: linear reversible evolution prior to the formation of persistent records, and multiplicative composition o...