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Title: Cubic interaction vertices and one-loop self-energy in the stable string bit model

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Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 96; Journal Issue: 4; Related Information: CHORUS Timestamp: 2017-08-31 10:44:51; Journal ID: ISSN 2470-0010
American Physical Society
Country of Publication:
United States

Citation Formats

Chen, Gaoli. Cubic interaction vertices and one-loop self-energy in the stable string bit model. United States: N. p., 2017. Web. doi:10.1103/PhysRevD.96.046021.
Chen, Gaoli. Cubic interaction vertices and one-loop self-energy in the stable string bit model. United States. doi:10.1103/PhysRevD.96.046021.
Chen, Gaoli. 2017. "Cubic interaction vertices and one-loop self-energy in the stable string bit model". United States. doi:10.1103/PhysRevD.96.046021.
title = {Cubic interaction vertices and one-loop self-energy in the stable string bit model},
author = {Chen, Gaoli},
abstractNote = {},
doi = {10.1103/PhysRevD.96.046021},
journal = {Physical Review D},
number = 4,
volume = 96,
place = {United States},
year = 2017,
month = 8

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on August 31, 2018
Publisher's Accepted Manuscript

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  • In contrast with previous expectations, covariant overlap vertices are not always suitable for gauge-covariant formulations of bosonic string field theory with a reduced supplementary field content. This is demonstrated for the version of the theory suggested by Neveu, Schwarz, and West. The method to construct the interaction, as formulated by Neveu and West, fails at one level higher than these authors have considered as long as the reduced field content is retained. The condition for a general vertex to describe formally a local gauge-invariant interaction is derived. The solution for the action functional and the gauge transformation law is exhibitedmore » for all fields at once, to first order in the coupling constant. However, all these vertices seem to be unphysical.« less
  • The evolution of deformation textures in copper and a brass that are representative of fcc metals with different stacking fault energies (SFEs) during cold rolling is predicted using a self-consistent (SC) model. The material parameters used for describing the micromechanical behavior of each metal are determined from the high-energy X-ray (HEXRD) diffraction data. At small reductions, a reliable prediction of the evolution of the grain orientation distribution that is represented as the continuous increase of the copper and brass components is achieved for both metals when compared with the experimental textures. With increasing deformation, the model could characterize the texturesmore » of copper, i.e., the strengthening of the copper component, when dislocation slip is still the dominant mechanism. For a brass at moderate and large reductions, a reliable prediction of its unique feature of texture evolution, i.e., the weakening of the copper component and the strengthening of the brass component, could only be achieved when proper boundary conditions together with some specified slip/twin systems are considered in the continuum micromechanics mainly containing twinning and shear banding. The present investigation suggests that for fcc metals with a low SFE, the mechanism of shear banding is the dominant contribution to the texture development at large deformations.« less
  • Particle-hole-magnetic and particle-particle-pairing susceptibilities can be expressed in terms of dressed Green's functions and interaction vertices. Using quantum Monte Carlo simulation techniques, the effect of the interaction vertices is examined to determine the sign and relative magnitude of the effective pairing interaction in various channels for the two-dimensional Hubbard model. Near half filling, we find that the singlet d/sub x//sub <2/-y/sup =/ pairing interaction is the most attractive. The extended near-neighbor s interaction is also weakly attractive, while the singlet s/sub x//sub y/ and d/sub x//sub y/ and the triplet p/sub x/ interactions are repulsive.
  • It is shown that there is an equivalence between the effective equationsof motion for the massless modes of the string and the conditions ofconformal invariance which correspond to the two/minus/dimensional sigma/minus/model ifthe one/minus/loop string contributions to the theory of open and closed bosonicstrings are taken into account. (AIP)