2009/02/28 by J. Leon, J. León, Eduardo Martín-Martínez +1
Physics and Astronomy · #Mechanical and Optical Resonators #Quantum Electrodynamics and Casimir Effect #Quantum Mechanics and Applications #quant-ph
paper · pdf · doi:10.1103/physreva.80.012314
published as Phys. Rev. A, 80, 012314 (2009) · RevTex, 11 pages, 3 figures. The replacement is due to some minor misprints corrections
openalex publication_date 2009/07/16 · arxiv created 2010/03/01 · arxiv updated 2010/03/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We investigate the Unruh effect on entanglement taking into account the spin degree of freedom of the Dirac field. We analyze spin Bell states in this setting, obtaining their entanglement dependence on the acceleration of one of the partners. Then, we consider simple analogs to the occupation number entangled state |00⟩+|11⟩ but with spin quantum numbers for |11⟩. We show that, despite their apparent similitude, while the spinless case is always qubit\ifmmode×\else\texttimes\fiqubit, for the spin case acceleration produces a qubit\ifmmode×\else\texttimes\fifour-level quantum system state. We also introduce a procedure to consistently erase the spin information from our setting preserving occupation numbers. We show how the maximally entangled state for occupation number emerges from our setting. We as well analyze its entanglement dependence on acceleration, obtaining greater entanglement degradation than in the spinless case.