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quant-ph2026

Extending the Bloch sphere model to an N-qubit system

Francisco Piñero, Cristian Franco, Hernán I. de la Cruz +5

The Bloch sphere is an elegant tool for representing single-qubit states. However, a widely accepted generalization for multi-qubit systems with entanglement remains absent. We pro…

quant-ph2026

Photon position eigenstates in configuration space

Artemio González-López, Luis Martínez Alonso

The expressions of the eigenfunctions of the Hawton photon position operator in configuration space are derived for several classes of wave function, including the Riemann--Silbers…

quant-ph2026

Decoherence in matter-wave Talbot interference: A hydrodynamic probability-flow analysis

David Navia, Ángel S. Sanz

We investigate the suppression of matter-wave Talbot interference under environmentally induced decoherence. The system is modeled as an atomic beam diffracted by a periodic gratin…

quant-ph2026★ 32 cited

Spectroscopy of the Dirac oscillator perturbed by a surface delta potential

J. Munárriz, F. Domínguez-Adame, R. P. A. Lima

We study theoretically the level shift of the Dirac oscillator perturbed by any sharply peaked potential approaching a surface delta potential. A Green function method is used to o…

quant-ph2026

Benchmarking quantum phase-space methods for near-resonant light propagation

Mojdeh S. Najafabadi, Joel F. Corney, Luis Sanchez Soto +1

We study the dynamics of light interacting with a near-resonant atomic medium using the truncated Wigner and positive P phase-space representations. The atomic degrees of freedom a…

quant-ph2026★ 1 cited

Experimental characterization of the hierarchy of quantum correlations in top quark pairs

Yoav Afik, Regina Demina, Alan Herrera +3

Recent results from the Large Hadron Collider have demonstrated quantum entanglement of top quark-antiquark pairs using the spin degrees of freedom. Based on the doubly differentia…

quant-ph2026

From Superradiance to Superabsorption: An Exact Treatment of Non-Markovian Cooperative Radiation

Ignacio González, Ángel Rivas

We investigate the emergence of cooperative radiation phenomena in ensembles of two-level atoms coupled to a lossy resonant cavity beyond the Markovian and mean-field approximation…

quant-ph2026

Chaos, thermalization and breakdown of quantum-classical correspondence in a collective many-body system

Ángel L. Corps, Sebastián Gómez, Pavel Stránský +2

We investigate thermalization and the quantum-classical correspondence in the collective Bose-Hubbard model, focusing on the four-site case. Our analysis of the classical phase-spa…