215,423 research outputs found
Chiral geometry and rotational structure for Cs in the projected shell model
The projected shell model with configuration mixing for nuclear chirality is
developed and applied to the observed rotational bands in the chiral nucleus
Cs. For the chiral bands, the energy spectra and electromagnetic
transition probabilities are well reproduced. The chiral geometry illustrated
in the and the is confirmed to be stable against the
configuration mixing. The other rotational bands are also described in the same
framework
On the critical point of the Random Walk Pinning Model in dimension d=3
We consider the Random Walk Pinning Model studied in [3,2]: this is a random
walk X on Z^d, whose law is modified by the exponential of \beta times
L_N(X,Y), the collision local time up to time N with the (quenched) trajectory
Y of another d-dimensional random walk. If \beta exceeds a certain critical
value \beta_c, the two walks stick together for typical Y realizations
(localized phase). A natural question is whether the disorder is relevant or
not, that is whether the quenched and annealed systems have the same critical
behavior. Birkner and Sun proved that \beta_c coincides with the critical point
of the annealed Random Walk Pinning Model if the space dimension is d=1 or d=2,
and that it differs from it in dimension d\ge4 (for d\ge 5, the result was
proven also in [2]). Here, we consider the open case of the marginal dimension
d=3, and we prove non-coincidence of the critical points.Comment: 23 pages; v2: added reference [4], where a result similar to Th. 2.8
is proven independently for the continuous-time mode
Five-quark components in decay
Five-quark components in the are shown to
contribute significantly to decay through
quark-antiquark annihilation transitions. These involve the overlap between the
and components and may be triggered by the confining
interaction between the quarks. With a 10% admixture of five-quark
components in the the decay width can be larger by factors 2 - 3
over that calculated in the quark model with 3 valence quarks, depending on the
details of the confining interaction. The effect of transitions between the
components themselves on the calculated decay width is however
small. The large contribution of the quark-antiquark annihilation transitions
thus may compensate the underprediction of the width of the by
the valence quark model, once the contains
components with 10% probability.Comment: accepted versio
Orbital-resolved vortex core states in FeSe Superconductors: calculation based on a three-orbital model
We study electronic structure of vortex core states of FeSe superconductors
based on a t three-orbital model by solving the Bogoliubov-de
Gennes(BdG) equation self-consistently. The orbital-resolved vortex core states
of different pairing symmetries manifest themselves as distinguishable
structures due to different quasi-particle wavefunctions. The obtained vortices
are classified in terms of the invariant subgroups of the symmetry group of the
mean-field Hamiltonian in the presence of magnetic field. Isotropic and
anisotropic wave vortices have symmetry for each orbital, whereas
wave vortices show symmetry for orbitals
and symmetry for orbital. In the case of
wave vortices, hybridized-pairing between and orbitals gives
rise to a relative phase difference in terms of gauge transformed pairing order
parameters between and orbitals, which is essentially
caused by a transformation of co-representation of and
subgroup. The calculated local density of states(LDOS) of wave
vortices show qualitatively similar pattern with experiment results. The phase
difference of between and orbital-resolved
wave vortices can be verified by further experiment observation
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