8,226 research outputs found
Liquid-gas mixed phase in nuclear matter at finite temperature
We explore the geometrical structure of Liquid-gas (LG) mixed phase which is
relevant to nuclear matter in the crust region of compact stars or supernovae.
To get the equation of state (EOS) of the system, the Maxwell construction is
found to be applicable to symmetric nuclear matter, where protons and neutrons
behave simultaneously. For asymmetric nuclear matter, on the other hand, the
phase equilibrium can be obtained by fully solving the Gibbs conditions since
the components in the L and G phases are completely different. We also discuss
the effects of surface and the Coulomb interaction on the mixed phase.Comment: Contributed talk at the INPC 2010 at Vancouve
Theory of Fano-Kondo effect in quantum dot systems: temperature dependence of the Fano line shapes
The Fano-Kondo effect in zero-bias conductance is studied based on a
theoretical model for the T-shaped quantum dot by the finite temperature
density matrix renormalization group method. The modification of the two Fano
line shapes at much higher temperatures than the Kondo temperature is also
investigated by the effective Fano parameter estimated as a fitting parameter.Comment: 2 pages, 2 figures, the proceeding of SCES'0
Topological Invariants for Polyacetylene, Kagome and Pyrochlore lattices
Adiabatic invariants by quantized Berry phases are defined for gapped
electronic systems in -dimensions (). This series includes
Polyacetylene, Kagome and Pyrochlore lattice respectively for and 3.
The invariants are quantum -multimer order parameters to characterize the
topological phase transitions by the multimerization. This fractional
quantization is protected by the global equivalence. As for the chiral
symmetric case, a topological form of the -invariant is explicitly given
as well.Comment: 4 pgages, 4 figure
Fully Bayes factors with a generalized g-prior
For the normal linear model variable selection problem, we propose selection
criteria based on a fully Bayes formulation with a generalization of Zellner's
-prior which allows for . A special case of the prior formulation is
seen to yield tractable closed forms for marginal densities and Bayes factors
which reveal new model evaluation characteristics of potential interest.Comment: Published in at http://dx.doi.org/10.1214/11-AOS917 the Annals of
Statistics (http://www.imstat.org/aos/) by the Institute of Mathematical
Statistics (http://www.imstat.org
Incommensurate Matrix Product State for Quantum Spin Systems
We introduce a matrix product state (MPS) with an incommensurate periodicity
by applying the spin-rotation operator of each site to a uniform MPS in the
thermodynamic limit. The spin rotations decrease the variational energy with
accompanying translational symmetry breaking and the rotational symmetry
breaking in the spin space even if the Hamiltonian has the both symmetries. The
optimized pitch of rotational operator reflects the commensurate/incommensurate
properties of spin-spin correlation functions in the Heisenberg chain
and the ferro-antiferro zigzag chain.Comment: 6 pages, 5 figure
High-Tc superconductivity in entirely end-bonded multi-walled carbon nanotubes
We report that entirely end-bonded multi-walled carbon nanotubes (MWNTs) can
show superconductivity with the transition temperature Tc as high as 12K that
is approximately 40-times larger than those reported in ropes of single-walled
nanotubes. We find that emergence of this superconductivity is very sensitive
to junction structures of Au electrode/MWNTs. This reveals that only MWNTs with
optimal numbers of electrically activated shells, which are realized by the
end-bonding, can allow the superconductivity due to inter shell effects.Comment: 5 page
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