scholarly journals Quantum dynamics of low-energy theory on semilocal non-Abelian strings

2011 ◽  
Vol 84 (6) ◽  
Author(s):  
P. Koroteev ◽  
M. Shifman ◽  
W. Vinci ◽  
A. Yung
Keyword(s):  
Quantum Dynamics ◽  
Low Energy ◽  
Energy Theory

scholarly journals The UV fate of anomalous U(1)s and the Swampland

2020 ◽  
Vol 2020 (11) ◽  
Author(s):  
Nathaniel Craig ◽  
Isabel Garcia Garcia ◽  
Graham D. Kribs
Keyword(s):  
Quantum Gravity ◽  
Gauge Theories ◽  
Critical Size ◽  
Gauge Coupling ◽  
Low Energy ◽  
Gravitational Anomaly ◽  
Light Vector ◽  
Energy Theory ◽  
The Cost ◽  
Weak Gravity

Abstract Massive U(1) gauge theories featuring parametrically light vectors are suspected to belong in the Swampland of consistent EFTs that cannot be embedded into a theory of quantum gravity. We study four-dimensional, chiral U(1) gauge theories that appear anomalous over a range of energies up to the scale of anomaly-cancelling massive chiral fermions. We show that such theories must be UV-completed at a finite cutoff below which a radial mode must appear, and cannot be decoupled — a Stückelberg limit does not exist. When the infrared fermion spectrum contains a mixed U(1)-gravitational anomaly, this class of theories provides a toy model of a boundary into the Swampland, for sufficiently small values of the vector mass. In this context, we show that the limit of a parametrically light vector comes at the cost of a quantum gravity scale that lies parametrically below MP1, and our result provides field theoretic evidence for the existence of a Swampland of EFTs that is disconnected from the subset of theories compatible with a gravitational UV-completion. Moreover, when the low energy theory also contains a U(1)3 anomaly, the Weak Gravity Conjecture scale makes an appearance in the form of a quantum gravity cutoff for values of the gauge coupling above a certain critical size.

scholarly journals NONCOMMUTATIVE OPEN STRING THEORIES AND THEIR DUALITIES

2001 ◽  
Vol 16 (04n06) ◽  
pp. 349-359 ◽  
Author(s):  
M. M. SHEIKH-JABBARI
Keyword(s):  
Open String ◽  
Low Energy ◽  
Duality Group ◽  
Critical Limit ◽  
Quantum Theories ◽  
Open Strings ◽  
Energy Theory ◽  
String Theories

The recently found noncritical open string theories is reviewed. These open strings, noncommutative open string theories (NCOS), arise as consistent quantum theories describing the low energy theory of D-branes in a background electric B-field in the critical limit. Focusing on the D3-brane case, we construct the most general (3+1) NCOS, which is described by four parameters. We study S- and T-dualities of these theories and argue the existence of a U-duality group.

scholarly journals MATRIX σ-MODELS FOR MULTI D-BRANE DYNAMICS

1998 ◽  
Vol 13 (11) ◽  
pp. 829-842 ◽  
Author(s):  
FEDELE LIZZI ◽  
NICK E. MAVROMATOS ◽  
RICHARD J. SZABO
Keyword(s):  
Field Theory ◽  
Quantum Dynamics ◽  
Open String ◽  
Effective Field ◽  
Low Energy ◽  
Target Space ◽  
Energy Dynamics ◽  
Space Action ◽  
Collective Coordinate ◽  
Genus Expansion

We describe a dynamical worldsheet origin for the Lagrangian describing the low-energy dynamics of a system of parallel D-branes. We show how matrix-valued collective coordinate fields for the D-branes naturally arise as couplings of a worldsheet σ-model, and that the quantum dynamics require that these couplings be mutually noncommutative. We show that the low-energy effective action for the σ-model couplings describes the propagation of an open string in the background of the multiple D-brane configuration, in which all string interactions between the constituent branes are integrated out and the genus expansion is taken into account, with a matrix-valued coupling. The effective field theory is governed by the non-Abelian Born–Infeld target space action which leads to the standard one for D-brane field theory.

Isotope effects on the resonance interactions and vibrational quantum dynamics of fluoroform 12,13CHF3

2017 ◽  
Vol 19 (39) ◽  
pp. 26527-26534 ◽  
Author(s):  
Sieghard Albert ◽  
Elena Bekhtereva ◽  
Irina Bolotova ◽  
Ziqiu Chen ◽  
Csaba Fábri ◽  
...  
Keyword(s):  
High Resolution ◽  
Quantum Dynamics ◽  
Isotope Effects ◽  
Low Energy ◽  
Energy Spectra ◽  
Resonance Interactions

We report a comparison of the vibrational quantum dynamics based on the analysis of the low energy spectra of 13CHF3 and 12CHF3 from the THz (FIR) range to the ν1 fundamental at high resolution ( or Doppler limited).

The (low-energy) physics of the superstring

1989 ◽  
Vol 329 (1605) ◽  
pp. 373-393 ◽  
Keyword(s):  
Symmetry Breaking ◽  
Effective Field ◽  
Low Energy ◽  
Unified Theory ◽  
Multiplet Structure ◽  
String Structure ◽  
Energy Theory ◽  
The Masses ◽  
Superstring Theories ◽  
Energy Physics

Superstring theories offer the prospect of a finite unified theory of the four fundamental interactions. However, their implications for low-energy physics are difficult to determine because there must be several stages of symmetry breaking leading from the underlying multidimensional supersymmetric string theory, relevant at the scale of string structure (not more than O (10 -32 cm)), to the four-dimensional non-supersymmetric effective field theory relevant for physics at scales probed in the laboratory (not less than O (10 -15 cm)). I discuss these stages of compactification, supersymmetry breaking and gauge-symmetry breaking and show how the resulting low-energy theory may closely approximate the observed structure. The implications for the multiplet structure, the masses and the couplings of the observed particle states are considered.

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