8,245 research outputs found
Erratum: Dynamics of the Bounds of Squared Concurrence [Phys. Rev. A 79, 032306 (2009)]
This is an erratum to our paper.Comment: a little different from the published versio
The Dynamics of the Bounds of Squared Concurrence
We study the dynamics of upper and lower bounds of squared concurrence.Our
results are similar to that of Konard et al. and can help the estimation of
high-dimension bipartite entanglement in experiments.Comment: 5 pages, 2 figures accepted by PR
Particle Entanglement in Rotating Gases
In this paper, we investigate the particle entanglement in 2D
weakly-interacting rotating Bose and Fermi gases. We find that both particle
localization and vortex localization can be indicated by particle entanglement.
We also use particle entanglement to show the occurrence of edge reconstruction
of rotating fermions. The different properties of condensate phase and vortex
liquid phase of bosons can be reflected by particle entanglement and in vortex
liquid phase we construct a trial wave function in the viewpoint of
entanglement to relate the ground state with quantum Hall state. Finally, the
relation between particle entanglement and interaction strength is studied.Comment: 7 pages, 9 figure
The Decay of Multiqudit Entanglement
We investigate the decay of entanglement of a generalized N-qudit GHZ state,
with each qudit passing through independently in a quantum noisy channel. By
studying the time at which the entanglement completely vanishes and the time at
which the entanglement becomes arbitrarily small, we try to find how the
robustness of entanglement is influenced by dimension d and the number of
particles N.Comment: 4 pages, 3 figure
Quantum Information Approach to Rotating Bose-Einstein Condensate
We investigate the 2D weakly interacting Bose-Einstein condensate in a
rotating trap by the tools of quantum information theory. The critical
exponents of the ground state fidelity susceptibility and the correlation
length of the system are obtained for the quantum phase transition when the
frst vortex is formed. We also find the single-particle entanglement can be an
indicator of the angular momentums for some real ground states. The
single-particle entanglement of fractional quantum Hall states such as Laughlin
state and Pfaffian state is also studied.Comment: 4 pages, 6 figures, minimal changes are mad
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