Papers
Per-Shot Evaluation of QAOA on Max-Cut: A Black-Box Implementation Comparison with Goemans-Williamson
Evgenii Dolzhkov, Franz G. Fuchs, Dirk Oliver Theis·Apr 9, 2026
The Quantum Approximate Optimization Algorithm (QAOA) has emerged as a promising approach for addressing combinatorial optimization problems on near-term quantum hardware. In this work, we conduct an empirical evaluation of QAOA on the Max-Cut proble...
Evaluating the performance of a weak-field homodyne receiver in quadrature phase-shift keying optical communication
Silvia Cassina, Alex Pozzoli, Michele N. Notarnicola +3 more·Apr 9, 2026
Quantum communication protocols require efficient detection schemes to maximize the information transfer rate between the sender and the receiver. To this aim, we have demonstrated that weak-field receivers, merging wave-like and particle-like featur...
Simultaneous ground-state cooling of six mechanical modes of two levitated nanoparticles
Qian Zhang, Yi Xu, Jie-Qiao Liao·Apr 9, 2026
Ground-state cooling is a prerequisite for exploring macroscopic quantum effects in mechanical motion of massive objects. Here we construct a polarization-angle-controllable coupled cavity-levitated-nanoparticle system in which two nanoparticles trap...
Informational Mpemba Effect for Fast State Purification in Non-Hermitian System
C. G. Feyisa, Huan-YuKu, J. -S. You +1 more·Apr 9, 2026
Quantum systems are inherently fragile to environmental fluctuations or decoherence, limiting their advantages in applications of quantum information and quantum computation. State purification offers a route to recover the purity of system under noi...
A Review of Variational Quantum Algorithms: Insights into Fault-Tolerant Quantum Computing
Zhirao Wang, Junxiang Huang, Runyu Ye +8 more·Apr 9, 2026
Variational quantum algorithms (VQAs) have established themselves as a central computational paradigm in the Noisy Intermediate-Scale Quantum (NISQ) era. By coupling parameterized quantum circuits (PQCs) with classical optimization, they operate effe...
Operational criteria for quantum advantage in latency-constrained nonlocal games
Changhao Li, Seigo Kikura, Akihisa Goban +2 more·Apr 8, 2026
Remote entanglement enables coordinated decision making without communication and produces correlations beyond those achievable by any classical strategy, representing a practical quantum advantage in time-critical distributed decision-making problem...
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...
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...
Assessing the Added Value of Onboard Earth Observation Processing with the IRIDE HEO Service Segment
Parampuneet Kaur Thind, Charles Mwangi, Giovanni Varetto +3 more·Apr 8, 2026
Current operational Earth Observation (EO) services, including the Copernicus Emergency Management Service (CEMS), the European Forest Fire Information System (EFFIS), and the Copernicus Land Monitoring Service (CLMS), rely primarily on ground-based ...
AV-SQL: Decomposing Complex Text-to-SQL Queries with Agentic Views
Minh Tam Pham, Trinh Pham, Tong Chen +3 more·Apr 8, 2026
Text-to-SQL is the task of translating natural language queries into executable SQL for a given database, enabling non-expert users to access structured data without writing SQL manually. Despite rapid advances driven by large language models (LLMs),...
Telecom C-band single-photon sources with a semiconductor-dielectric microresonator
Yuriy Serov, Aidar Galimov, Sergey Sorokin +19 more·Apr 8, 2026
Secure communications with quantum key distribution over fiber-optic links is one of the few recognized applications of quantum physics at the level of individual quanta -- single C-band photons. Currently, the widely used sources of such photons are...
Attosecond quantum spectroscopy with entangled photon pairs
Zijian Lyu, Fengxiao Sun, Sili Yi +6 more·Apr 8, 2026
Bright squeezed light from parametric down-conversion in the infrared (IR) frequency range has triggered the emergence of attosecond quantum optics -- a new research field at the interface of quantum optics, strong-field physics, and attosecond techn...
Magnon harmonic generation in antiferromagnets: Dynamical symmetry enriched by symmetry breaking
Yuto Jita, Minoru Kanega, Takumi Ogawa +2 more·Apr 8, 2026
In recent years, techniques of intense THz laser have enabled us to experimentally observe nonlinear spin dynamics in antiferromagnets since the elementary excitations such as magnons reside on a THz to GHz range in antiferromagnets and THz laser thu...
High-Dimensional Quantum Photonics: Roadmap
Mehul Malik, Micheal Kues, Takuya Ikuta +30 more·Apr 7, 2026
The field of high-dimensional quantum photonics involves the use of multimode photonic degrees-of-freedom such as the spatial, temporal, or spectral structure of light to encode multi-level quantum states. Recent years have seen rapid progress in the...
Fault-Tolerant One-Shot Entanglement Generation with Constant-Sized Quantum Devices in the Plane
Dylan Harley, Robert Koenig·Apr 7, 2026
Consider a rectangular grid of qubits in 2D with single-qubit and nearest-neighbor two-qubit operations subject to local stochastic Pauli noise. At different length scales, this setup describes both a single quantum computing device with geometricall...
Experimental predictions of the $E_8 \times ωE_8$ octonionic unification program : A falsification-oriented catalogue for quantum foundations, particle physics, gravitation, and cosmology
Tejinder P. Singh·Apr 7, 2026
The $E_8 \times ωE_8$ octonionic program aims at a deliberately ambitious synthesis: quantum theory without external classical time, objective collapse, emergent classical space-time, exceptional Jordan-algebra flavor structure, and an exceptional-gr...
Deviations from thermal light statistics in ensembles of independent two-level emitters
Manuel Bojer, André Cidrim, Romain Bachelard +1 more·Apr 7, 2026
We investigate the light statistics of an ensemble of independent motionless two-level atoms in a product state. We identify the conditions under which the cold atomic ensemble emits thermal light statistics characterized by the Gaussian Moment Theor...
Quantum-Boosted Nonlinear Tunneling Driven by a Bright Squeezed Vacuum
Zhejun Jiang, Shengzhe Pan, Jianqi Chen +12 more·Apr 7, 2026
Nonlinear processes, mediated by multiphoton interactions rather than single-photon response, drive numerous fundamental phenomena and momentous applications in modern physics. Among these processes, tunneling ionization plays a pivotal role as it dr...
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...
Quantum state randomization constrained by non-Abelian symmetries
Yuhan Wu, Joaquin F. Rodriguez-Nieva·Apr 6, 2026
The emergence of randomness from unitary quantum dynamics is a central problem across diverse disciplines, ranging from the foundations of statistical mechanics to quantum algorithms and quantum computation. Physical systems are invariably subject to...