Condensed Matter Physics, 2007, vol. 10, No. 3(51), p. 425-432, English
DOI:10.5488/CMP.10.3.425
Title:
Emptiness formation probability for the spin-1/2 XX chain with three spin and uniform long-range interactions
Author(s):
 
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P.Lou
(Depament of Chemistry, Sungkyunkwan University,Suwon 440--746, Korea; Depament of Physics, Anhui University, Hefei 230039, Anhui, P.R. China)
,
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J.Y.Lee
(Depament of Chemistry, Sungkyunkwan University,Suwon 440--746, Korea)
,
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The emptiness formation probability (EFP) that the first n
spins of the chain are all aligned downwards is studied for
the one-dimensional spin-1/2 XX chain system with
both critical and non-critical regimes with three spin and
uniform long-range interactions. By using the emptiness
formation probability P(n), the block-block entanglement Sn
and the magnetization M z, the properties of the system are
also studied. It is worthy of note that when the quantum phase
transition from the phase III to the phase II occurs, the Emptiness
Formation Probability P(n) of the system decreases, but
the block-block entanglement Sn increases.
Key words:
emptiness formation probability, spin-1/2 XX
chain, three spin and uniform long-range interactions
PACS:
75.10.Jm, 75.40.Cx, 75.40.-s, 73.43.Nq
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