Quantum Physics
[Submitted on 1 Mar 2011 (v1), last revised 8 Mar 2011 (this version, v2)]
Title:Tripartite Entanglements in Non-inertial Frames
View PDFAbstract:Entanglement degradation caused by the Unruh effect is discussed for the tripartite GHZ or W states constructed by modes of a non-interacting quantum field viewed by one inertial observer and two uniformly accelerated observers. For fermionic states, the Unruh effect even for infinite accelerations cannot completely remove the entanglement. However, for the bosonic states, the situation is different and the entanglement vanishes asymptotically. Also, the entanglement is studied for the bipartite subsystems. While for the GHZ states all the bipartite subsystems are identically disentangled, for the W states the bipartite subsystems are somewhat entangled, though, this entanglement can be removed for appropriately accelerated observers. Interestingly, logarithmic negativity as a measure for determining the entanglement of one part of the system relative to the other two parts, is not generally the same for different parts. This means that we encounter tripartite systems where each part is differently entangled to the other two parts.
Submission history
From: Bahram Nasr Esfahani [view email][v1] Tue, 1 Mar 2011 19:49:21 UTC (652 KB)
[v2] Tue, 8 Mar 2011 19:18:44 UTC (653 KB)
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