3,299 research outputs found
Testing violation of the Leggett-Garg-type inequality in neutrino oscillations of the Daya Bay experiment
The Leggett-Garg inequality (LGI), derived under the assumption of realism,
acts as the temporal Bell's inequality. It is studied in electromagnetic and
strong interaction like photonics, superconducting qu-bits and nuclear spin.
Until the weak interaction two-state oscillations of neutrinos affirmed the
violation of Leggett-Garg-type inequalities (LGtI). We make an empirical test
for the deviation of experimental results with the classical limits by
analyzing the survival probability data of reactor neutrinos at a distinct
range of baseline dividing energies, as an analog to a single neutrino detected
at different time. A study of the updated data of Daya-Bay experiment
unambiguously depicts an obvious cluster of data over the classical bound of
LGtI and shows a significance of the violation of them.Comment: 11 pages, 6 figure
Dynamics of Order Parameter in Photoexcited Peierls Chain
The photoexcited dynamics of order parameter in Peierls chain is investigated
by using a microscopic quantum theory in the limit where the hot electrons may
establish themselves into a quasi-equilibrium state described by an effective
temperature. The optical phonon mode responsible for the Peierls instability is
coupled to the electron subsystem, and its dynamic equation is derived in terms
of the density matrix technique. Recovery dynamics of the order parameter is
obtained, which reveals a number of interesting features including the change
of oscillation frequency and amplitude at phase transition temperature and the
photo-induced switching of order parameter.Comment: 5 pages, 3 figure
Possible pi-phase shift at interface of two pnictides with antiphase s-wave pairing
We examine the nature of Josephson junction between two identical
Fe-pnictides with anti-phase s-wave pairing. pi-phase shift is found if the
junction barrier is thick and the two Fe-pnictides are oriented in certain
directions relative to the interface. Our theory provides a possible
explanation for the observed half integer flux quantum transitions in a
niobium/polycrystal NdFeAsO loop, and attributes the pi-phase shift to
intergrain junctions of Fe-pnictides.Comment: 4 pages, 2 figure
Holographic Schwinger effect with a moving D3-brane
We study the Schwinger effect with a moving D3-brane in a =4 SYM
plasma with the aid of AdS/CFT correspondence. We discuss the test particle
pair moving transverse and parallel to the plasma wind respectively. It is
found that for both cases the presence of velocity tends to increase the
Schwinger effect. In addition, the velocity has a stronger influence on the
Schwinger effect when the pair moves transverse to the plasma wind rather than
parallel.Comment: 8 pages, 6 figure
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