90,429 research outputs found
Non-Markovian disentanglement dynamics of two-qubit system
We investigated the disentanglement dynamics of two-qubit system in
Non-Markovian approach. We showed that only the couple strength with the
environment near to or less than fine-structure constant 1/137, entanglement
appear exponential decay for a certain class of two-qubit entangled state.
While the coupling between qubit and the environment is much larger, system
always appears the sudden-death of entanglement even in the vacuum environment.Comment: 17 pages, 3 figure
Comparing the Tsallis distribution with and without thermodynamical description in p+p collisions
We compare two types of Tsallis distribution, i.e., with and without
thermodynamical description, using the experimental data from the STAR, PHENIX,
ALICE and CMS Collaborations on the rapidity and energy dependence of the
transverse momentum spectra in p+p collisions. Both of them can give us the
similar fitting power to the particle spectra. We show that the Tsallis
distribution with thermodynamical description gives lower temperatures than the
ones without it. The extra factor (transverse mass) in the Tsallis
distribution with thermodynamical description plays an important role in the
discrepancies between the two types of Tsallis distribution. But for the heavy
particles, the choice to use the or (transverse energy) in the
Tsallis distribution becomes more crucial.Comment: 9 pages, 5 figure
Canonical Formalism for Lagrangians of Maximal Nonlocality
A canonical formalism for Lagrangians of maximal nonlocality is established.
The method is based on the familiar Legendre transformation to a new function
which can be derived from the maximally nonlocal Lagrangian. The corresponding
canonical equations are derived through the standard procedure in local theory
and appear much like those local ones, though the implication of the equations
is largely expanded.Comment: 17 pages with 1 eps figur
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