772 research outputs found
Dual chiral density waves in nuclear matter
We study inhomogeneous chiral phases in nuclear matter using a hadronic model
with the parity doublet structure. With an extended ansatz for the dual chiral
density wave off the chiral limit, we numerically determine the phase
structure. A new type of dual chiral density wave where the condensate has
nonvanishing space average is confirmed and it comes to occupy a wide range of
low density region as the chiral invariant mass parameter is lowered.Comment: 7 pages, 5 eps figures, contribution to "QCD@Work 2018",
International Workshop on QCD Theory and Experiment. 25-28 June 2018, Matera,
Ital
Application of tensor network method to two dimensional lattice Wess-Zumino model
We study a tensor network formulation of the two dimensional lattice
Wess-Zumino model with Wilson derivatives for both fermions and
bosons. The tensor renormalization group allows us to compute the partition
function without the sign problem, and basic ideas to obtain a tensor network
for both fermion and scalar boson systems were already given in previous works.
In addition to improving the methods, we have constructed a tensor network
representation of the model including the Yukawa-type interaction of Majorana
fermions and real scalar bosons. We present some numerical results.Comment: 8 pages, 4 figures, talk presented at the 35th International
Symposium on Lattice Field Theory (Lattice 2017), 18-24 June 2017, Granada,
Spai
Scalar polarization window in gravitational-wave signals
Scalar polarization modes of gravitational waves, which are often introduced
in the context of the viable extension of gravity, have been actively searched.
However, couplings of the scalar modes to the matter are strongly constrained
by the fifth-force experiments. Thus, the amplitude of scalar polarization in
the observed gravitational-wave signal must be significantly suppressed
compared to that of the tensor modes. Here, we discuss the implications of the
experiments in the solar system on the detectability of scalar modes in
gravitational waves from compact binary coalescences, taking into account the
whole processes from the generation to the observation of gravitational waves.
We first claim that the energy carried by the scalar modes at the generation
is, at most, that of the tensor modes from the observed phase evolution of the
inspiral gravitational waves. Next, we formulate general gravitational-wave
propagation and point out that the energy flux hardly changes through
propagation as long as the background changes slowly compared to the wavelength
of the propagating waves. Finally, we show that the possible magnitude of
scalar polarization modes detected by the ground-based gravitational-wave
telescopes is already severely constrained by the existing gravity tests in the
solar system.Comment: 18 page
Facile strategy for obtaining luminescent polymorphs based on the chirality of a boron-fused azomethine complex
A chloro-substituted boron-fused azomethine complex (BAmCl) having a stereogenic boron center was synthesized for obtaining a luminescent chiral crystal. We succeeded in isolating the (R)- and (S)-enantiomers of BAmCl and preparing the homochiral polymorphic crystal, while we obtained the racemic crystal with rac-BAmCl. Single crystal X-ray diffraction analyses suggest that a variety of intermolecular interaction patterns and intrinsic flexibility of the molecular framework should play a significant role in stabilizing the homochiral crystal. We found the difference in molecular arrangements between the racemic and the homochiral crystals, and we observed distinctly different emission colors. In particular, we observed heat-initiated homogeneous racemization without the need for a solvent or catalyst in the molten state of the homochiral crystal (R)-BAmCl. Our results mean that chiral resolution of a flexible fused-skeleton having a stereogenic boron center can be a platform for creating luminescent polymorphic materials
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