Physics – Quantum Physics
Scientific paper
2010-07-27
Phys.Rev.A82:042332,2010
Physics
Quantum Physics
revtex4, 3 figures, I.F. previously published as Fuentes-Guridi and Fuentes-Schuller. Minor changes and Journal reference adde
Scientific paper
10.1103/PhysRevA.82.042332
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.
Bruschi David Edward
Dragan Andrzej
Fuentes Ivette
Louko Jorma
Martin-Martinez Eduardo
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