Papers
Qurator: Scheduling Hybrid Quantum-Classical Workflows Across Heterogeneous Cloud Providers
Sinan Pehlivanoglu, Ulrik de Muelenaere, Peter Kogge +1 more·Apr 7, 2026
As quantum computing moves from isolated experiments toward integration with large-scale workflows, the integration of quantum devices into HPC systems has gained much interest. Quantum cloud providers expose shared devices through first-come first-s...
Mass generation in graphs
Ioannis Kleftogiannis, Ilias Amanatidis·Apr 7, 2026
We demonstrate a mechanism for the production of massive excitations in graphs. We treat the number of neighbors at each vertex in the graph (degree) as a scalar field. Then we introduce a mechanism inspired by the Higgs mechanism in quantum field th...
Non-Markovian exceptional points in waveguide quantum electrodynamics
Stefano Longhi·Apr 7, 2026
Spontaneous emission of a quantum emitter, such as an excited atom, is a fundamental process in quantum electrodynamics (QED), typically associated with exponential decay to the ground state accompanied by irreversible photon emission. This simple Ma...
Accelerating Quantum State Encoding with SIMD: Design, Implementation, and Benchmarking
Riza Alaudin Syah, Irwan Alnarus Kautsar, Gunawan Witjaksono +1 more·Apr 7, 2026
Efficient data encoding is the main factor affecting how fast hybrid quantum-classical algorithms run, but traditional simulators spend most of their time changing classical features into quantum rotations. This work introduces Hybriqu Encoder, a Rus...
Phase-Fidelity-Aware Truncated Quantum Fourier Transform for Scalable Phase Estimation on NISQ Hardware
Akoramurthy B, Surendiran. B·Apr 7, 2026
Quantum phase estimation~(QPE) is central to numerous quantum algorithms, yet its standard implementation demands an $\calO(m^{2})$-gate quantum Fourier transform~(QFT) on $m$ control qubits-a prohibitive overhead on near-term noisy intermediate-scal...
Another Triumph of Locality: Colliding Histories Skew Handshakes
Charles Alexandre Bédard·Apr 7, 2026
From gravity to electromagnetism, apparent action at a distance has always been resolved by deeper, local explanations. Yet today, Bell's theorem is widely interpreted as the death knell for local reality. In this chapter, I present the theorem in ac...
A Digital Spreading Framework for Quantum Expectation Computation Without Rotation Gates or Arithmetic Circuits
Yu-Ting Kao, Yeong-Jar Chang·Apr 7, 2026
In the pursuit of quantum advantage for financial engineering, researchers face a critical dilemma: analog rotation gates suffer from inherent 'sine-to-square' biases and error magnification, while digital arithmetic circuits (e.g., WeightedAdder) in...
Decoherence-induced Multiphoton Interference
Yifan Du, Jiuyi Zhang, Daniel López Martínez +2 more·Apr 7, 2026
Decoherence is usually deemed detrimental to quantum information processing. Its control and minimization require significant costs and operating overheads, constituting a major hurdle to commercialize quantum technology. Yet, quantum mechanics provi...
Granularity Noise Limit in Atomic-Ensemble-Based Metrology
Chen-Rong Liu, Chuang Li, Runxia Tao +4 more·Apr 7, 2026
Conventional noise analysis in atomic-ensemble sensing assumes a continuous-medium approximation, thereby treating the atomic system as a deterministic dielectric. Here, we demonstrate that this assumption breaks down due to the discrete, particulate...
Molecular Excited States using Quantum Subspace Methods: Accuracy, Resource Reduction, and Error-Mitigated Hardware Implementation of q-sc-EOM
Srivathsan Poyyapakkam Sundar, Prince Frederick Kwao, Alexey Galda +1 more·Apr 7, 2026
Problems in quantum chemical simulations, especially achieving accurate excited-state potential energy surfaces, are among the primary applications to achieve quantum utility. On near-term quantum hardware, variants of the variational quantum eigenso...
Entanglement in the open XX chain: Rényi oscillations, hard-edge crossover, and symmetry resolution
Miguel Tierz·Apr 7, 2026
We derive closed-form asymptotic formulas for the Rényi entanglement entropies of the open XX spin-$1/2$ chain by mapping the underlying determinant of the boundary correlation matrix (which has Toeplitz-plus-Hankel structure) to a Hankel determinant...
SMT-AD: a scalable quantum-inspired anomaly detection approach
Apimuk Sornsaeng, Si Min Chan, Wenxuan Zhang +3 more·Apr 7, 2026
Quantum-inspired tensor networks algorithms have shown to be effective and efficient models for machine learning tasks, including anomaly detection. Here, we propose a highly parallelizable quantum-inspired approach which we call SMT-AD from Superpos...
Dynamics of Entanglement in Schwarzschild Black Holes
Fang Xie, Ying Yang, Tinggui Zhang +1 more·Apr 7, 2026
To characterize the effect of Hawking radiation induced by the quantum atmosphere beyond the event horizon on entanglement, we employ concurrence as the entanglement measure for a bipartite mixed state and investigate its evolution with Hawking tempe...
Noise is not always detrimental: the capacity of quantum batteries is enhanced in black holes
Xukun Wang, Xiaofen Huang, Zhihao Ma +2 more·Apr 7, 2026
Quantum battery capacity, as a critical metric for quantifying energy storage and release in quantum systems, exhibits complex behaviors in curved spacetime and noisy environments. This study focuses on bipartite mixed state, aiming to explore the mo...
Addressing a device in a quantum network: A quantum approach including routing
Alexander Pirker·Apr 7, 2026
In this work we propose an addressing scheme for quantum networks which relies on quantum states held by devices. Quantum network devices use their address state together with a request state that encodes the tasks to be executed. Our approach not on...
Square-root Time Atom Reconfiguration Plan for Lattice-shaped Mobile Tweezers
Koki Aoyama, Takafumi Tomita, Fumihiko Ino·Apr 7, 2026
This paper proposes a scalable planning algorithm for creating defect-free atom arrays in neutral-atom systems. The algorithm generates a $\mathcal{O}(\sqrt N)$ time plan for $N$ atoms by parallelizing atom transport using a two-dimensional lattice p...
Nonlinear signal enhancement of strongly-coupled molecules in pump-probe experiments
Alexander M. McKillop, Marissa L. Weichman·Apr 6, 2026
Nonlinear spectroscopy is widely used to study the transient dynamics of molecules under strong light-matter coupling, though it remains unclear to what extent uncoupled intracavity molecules obscure signals from the strongly-coupled species of inter...
Edge universality in Floquet sideband spectra
Miguel Tierz·Apr 6, 2026
We show that, for non-interacting fermions under a monochromatic phase drive (Tien--Gordon regime), the outgoing sideband occupations at a sharp Fermi edge are governed by the discrete Bessel kernel -- an exact result at any drive amplitude~$A$. In t...
Quantum Hilbert Space Fragmentation and Entangled Frozen States
Zihan Zhou, Tian-Hua Yang, Bo-Ting Chen·Apr 6, 2026
We find that rank deficiency of the local Hamiltonian in a classically fragmented model is the key mechanism leading to quantum Hilbert space fragmentation. The rank deficiency produces local null directions that can generate entangled frozen states ...
Approximate vortex lattices of atomic Fermi superfluid on a spherical surface
Keshab Sony, Yan He, Chih-Chun Chien·Apr 6, 2026
While planar Fermi superfluids form Abrikosov vortex lattices under magnetic or effective gauge fields, spherical geometry forbids perfect lattices above 20 vortices. We characterize approximate vortex structures of atomic Fermi superfluids under an ...