45 research outputs found
Universality and quantized response in bosonic nonfractionalized tunneling
We show that tunneling involving bosonic wires and/or boson integer quantum
Hall (bIQH) edges is characterized by universal features which are absent in
their fermionic counterparts. Considering a pair of minimal geometries, we find
a low energy enhancement and a universal high versus zero energy relation for
the tunnel conductance that holds for all wire/bIQH edge combinations. Features
distinguishing bIQH edges include a current imbalance to chemical potential
bias ratio that is quantized despite the lack of conductance quantization in
the bIQH edges themselves. The predicted phenomena require only initial states
to be thermal and thus are well suited for tests with ultracold bosons forming
wires and bIQH states. For the latter, we highlight a potential realization
based on single component bosons in the recently observed Harper-Hofstadter
bandstructure
Consistent Thermodynamics for Quasiparticle Boson System with Zero Chemical Potential
The thermodynamic consistency of quasiparticle boson system with effective
mass and zero chemical potential is studied. We take the quasiparticle
gluon plasma model as a toy model. The failure of previous treatments based on
traditional partial derivative is addressed. We show that a consistent
thermodynamic treatment can be applied to such boson system provided that a new
degree of freedom is introduced in the partial derivative calculation. A
pressure modification term different from the vacuum contribution is derived
based on the new independent variable . A complete and self-consistent
thermodynamic treatment for quasiparticle system, which can be widely applied
to effective mass models, has been constructed.Comment: 21 pages, 10 figures (the description to the model is modified,
accepted by Int.J.Mod.Phys.A
A consistent thermodynamic treatment for quark mass density-dependent model
The ambiguities and inconsistencies in previous thermodynamic treatments for
the quark mass density-dependent model are addressed. A new treatment is
suggested to obtain the self-consistent results. A new independent variable of
effective mass is introduced to make the traditional thermodynamic calculation
with partial derivative still practicable. The contribution from physical
vacuum has been discussed. We find that the properties of strange quark matter
given by quark mass density-dependent model are nearly the same as those
obtained by MIT bag model after considering the contribution of the physical
vacuum.Comment: 18 pages, 2 figure
Superfluid phases of fermions with hybridized and orbitals
We explore the superfluid phases of a two-component Fermi mixture with
hybridized orbitals in optical lattices. We show that there exists a general
mapping of this system to the Lieb lattice. By using simple multiband models
with hopping between and -orbital states, we show that superfluid order
parameters can have a -phase difference between lattice sites, which is
distinct from the case with hopping between -orbitals. If the population
imbalance between the two spin species is tuned, the superfluid phase may
evolve through various phases due to the interplay between hopping,
interactions and imbalance. We show that the rich behavior is observable in
experimentally realizable systems.Comment: 13 pages, 11 figures. Published versio
Liquid-gas Phase Transition in Strange Hadronic Matter with Weak Y-Y Interaction
The liquid-gas phase transition in strange hadronic matter is reexamined by
using the new parameters about the interaction deduced from
recent observation of double hypernucleus. The
extended Furnstahl-Serot-Tang model with nucleons and hyperons is utilized. The
binodal surface, the limit pressure, the entropy, the specific heat capacity
and the Caloric curves are addressed. We find that the liquid-gas phase
transition can occur more easily in strange hadronic matter with weak Y-Y
interaction than that of the strong Y-Y interaction.Comment: 10 pages, 7 figure