12,028 research outputs found
Chiral magnetic currents with QGP medium response in heavy ion collisions at RHIC and LHC energies
We calculate the electromagnetic current with a more realistic approach in
the RHIC and LHC energy regions in the article. We take the partons formation
time as the initial time of the magnetic field response of QGP medium. The
maximum electromagnetic current and the time-integrated current are two
important characteristics of the chiral magnetic effect (CME), which can
characterize the intensity and duration of fluctuations of CME. We consider the
finite frequency response of CME to a time-varying magnetic field, find a
significant impact from QGP medium feedback, and estimate the generated
electromagnetic current as a function of time, beam energy and impact
parameter.Comment: 10 pages, 12 figur
Topological phase in topological Kondo insulator: topological insulator, Haldane-like phase and Kondo breakdown
We have simulated a half-filled -wave periodic Anderson model with
numerically exact projector quantum Monte Carlo technique, and the system is
indeed located in the Haldane-like state as detected in previous works on the
-wave Kondo lattice model, though the soluble non-interacting limit
corresponds to the conventional topological insulator. The
site-resolved magnetization in an open boundary system and strange correlator
for the periodic boundary have been used to identify the mentioned topological
states. Interestingly, the edge magnetization in the Haldane-like state is not
saturated to unit magnetic moment due to the intrinsic charge fluctuation in
our periodic Anderson-like model, which is beyond the description of the Kondo
lattice-like model in existing literature. The finding here underlies the
correlation driven topological state in this prototypical interacting
topological state of matter and naive use of non-interacting picture should be
taken care. Moreover, no trace of the surface Kondo breakdown at zero
temperature is observed and it is suspected that frustration-like interaction
may be crucial in inducing such radical destruction of Kondo screening. The
findings here may be relevant to our understanding of interacting topological
materials like topological Kondo insulator candidate SmB.Comment: 11 pages, 9 figures, accepted by EPJ
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