Density wave 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.

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Novel dual chiral density wave in nuclear matter based on a parity doublet structure

Physical Review D ◽

10.1103/physrevd.97.094032 ◽

2018 ◽

Vol 97 (9) ◽

Cited By ~ 7

Author(s):

Yusuke Takeda ◽

Hiroaki Abuki ◽

Masayasu Harada

Keyword(s):

Nuclear Matter ◽

Density Wave ◽

Parity Doublet ◽

Doublet Structure

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Holography and fermions at a finite chemical potentialThis paper was presented at the Theory CANADA 4 conference, held at Centre de recherches mathématiques, Montréal, Québec, Canada on 4–7 June 2008.

Canadian Journal of Physics ◽

10.1139/p08-110 ◽

2009 ◽

Vol 87 (3) ◽

pp. 271-277 ◽

Cited By ~ 1

Author(s):

Moshe Rozali ◽

Lionel Brits

Keyword(s):

Fermi Surface ◽

Nuclear Matter ◽

Chemical Potential ◽

Density Wave ◽

Zero Temperature ◽

Baryon Chemical Potential ◽

Wave Instability ◽

Large N ◽

Holographic Qcd ◽

Matter Phase

We review the Sakai–Sugimoto model of holographic QCD at zero temperature and finite chemical potential, comparing the results to those expected at large-Nc QCD, and those in a closely related holographic model. We find that as the baryon chemical potential is increased above a critical value, there is a phase transition to a nuclear matter phase, the details of which depend on the model. We argue that the nuclear matter phase is necessarily inhomogeneous to arbitrarily high density, which suggests an explanation of the “chiral density wave” instability of the quark Fermi surface in large-Nc QCD. Some details of the instanton distribution in the holographic dual are reminiscent of a Fermi surface. This short manuscript summarizes a talk given by M.R. at Theory CANADA 4 conference and is based largely (but not entirely) on the results of (Rozali et al. JHEP. 53, 01 (2008)).

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Theory of a density-wave instability in symmetric nuclear matter

Physical Review C ◽

10.1103/physrevc.64.014303 ◽

2001 ◽

Vol 64 (1) ◽

Cited By ~ 3

Author(s):

A. E. Pozamantir ◽

A. W. Overhauser

Keyword(s):

Nuclear Matter ◽

Density Wave ◽

Symmetric Nuclear Matter ◽

Wave Instability

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Incommensurate modulated phases of the NbxTa1-xTe4 charge density wave system

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100120692 ◽

1992 ◽

Vol 50 (1) ◽

pp. 58-59

Author(s):

S. Ritchie ◽

J. C. Bennett ◽

A. Prodan ◽

F.W. Boswell ◽

J.M. Corbett

Keyword(s):

Charge Density ◽

Charge Density Wave ◽

Direct Evidence ◽

Density Wave ◽

Wave System ◽

Modulated Phases ◽

Metal Atoms ◽

Incommensurate Modulation ◽

End Members ◽

Modulation Wave Vector

A continuous sequence of compounds having composition NbxTa1-xTe4; 0 ≤ x ≤ 1 have been studied by electron diffraction and microscopy. Previous studies have shown that the end members of the series, TaTε4 and NbTε4 possess a quasi-one-dimensional character and exhibit charge density wave (CDW) distortions. In these compounds, the subcell structure is tetragonal with axes (a × a × c) and consists of the metal atoms (Nb or Ta) centered within an extended antiprismatic cage of Te atoms. At room temperature, TaTε4 has a commensurate modulation structure with a 2a × 2a × 3c unit cell. In NbTε4, an incommensurate modulation with × ∼ 16c axes is observed. Preliminary studies of the mixed compounds NbxTα1-xTε4 showed a discontinuous jump of the modulation wave vector commensurate to incommensurate when the Nb dopant concentration x, exceeded x ≃ 0.3, In this paper, the nature of the compositional dependence of is studied in greater detail and evidence is presented for a stepwise variation of . This constitutes the first direct evidence for a Devil's staircase in CDW materials.

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