2010/07/31 by D. E. Bruschi, J. Louko, E. Martin-Martinez +2 · 2 citations
Physics and Astronomy · #quant-ph #gr-qc
paper · pdf · doi:10.1103/physreva.82.042332
published as Phys. Rev. A 82:042332 (2010) · revtex4, 3 figures, I.F. previously published as Fuentes-Guridi and Fuentes-Schuller. Minor changes and Journal reference added
arxiv created 2010/10/26 · arxiv updated 2017/07/28
We address the validity of the single-mode approximation that is commonly invoked in the analysis of entanglement in non-inertial frames and in other relativistic quantum information scenarios. We show that the single-mode approximation is not valid for arbitrary states, finding corrections to previous studies beyond such approximation in the bosonic and fermionic cases. We also exhibit a class of wave packets for which the single-mode approximation is justified subject to the peaking constraints set by an appropriate Fourier transform.