Unruh effect in quantum information beyond the single-mode approximation

作者：Bruschi David E^*; Louko Jorma; Martin Martinez Eduardo; Dragan Andrzej; Fuentes Ivette

来源：Physical Review A, 2010, 82(4): 042332.

DOI：10.1103/PhysRevA.82.042332

We address the validity of the single-mode approximation that is commonly invoked in the analysis of entanglement in noninertial 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 approximations 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.

• 出版日期2010-10-26