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About 10,000 papers for “String (physics)”

String Physics

Lambert, Neil (CERN) · CERN Document Server (European Organization for Nuclear Research) · 2012

Cited by 0

String Physics

Neil (CERN) Lambert · CERN Document Server (European Organization for Nuclear Research) · 2012

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Cited by 0

Bit-String Physics

H. Pierre Noyes, Jeffrey Berg · Series on knots and everything · 2001

Cited by 10

String theory : physics or metaphysics?

G. Veneziano · CERN Bulletin · 2010

I will give arguments for why the enormous progress made during the last century on understanding elementary particles and their fundamental interactions suggests strings as the truly elementary constituents of Nature. I will then address the issue of whether the string paradigm can in principle be falsified or whether it should be considered as mere metaphysics.

Cited by 2Open access

Particle Physics from String Compactifications

W. Buchmüller, Jan Louis · Desy Publications Database (Deutsches Elektronen-Synchrotron DESY) · 2018

We briefly review the work carried out in project A1 of the SFB 676. This includes in particular string compactifications to vacua containing the Standard Model. We compare heterotic compactifications with F-theory, and we mention a number of technical developments. Motivated by string compactifications, several aspects of six-dimensional field theories are described, which shed some light on supersymmetry breaking, moduli stabilization and the little hierarchy problem. We highlight some virtues of flux compactifications and conclude with a brief discussion of LHC phenomenology.

Cited by 0Open access

Physics of String Flux Compactifications

Frederik Denef, Michael R. Douglas, Shamit Kachru · OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) · 2007

We provide a qualitative review of flux compactifications of string theory, focusing on broad physical implications and statistical methods of analysis.

Cited by 15Open access

Physics of String Flux Compactifications

Shamit Kachru, Michael R. Douglas, Frederik Denef · Digital Access to Scholarship at Harvard (DASH) (Harvard University) · 2009

We provide a qualitative review of flux compactifications of string theory, focusing on broad physical implications and statistical methods of analysis.

Cited by 96Open access

The physics of guitar string vibrations

Polievkt Perov, Walter Johnson, Nataliia Perova-Mello · American Journal of Physics · 2015

We describe laboratory experiments to study the harmonic content of standing waves in guitar strings. The experimental data were taken by using the magnetic pickup from a guitar and a digital oscilloscope with a Fast Fourier transform capability. The amplitudes of the harmonics in the measured signal depend on the location where the string is plucked, resulting in a different timbre of the sound. The relative amplitudes of transverse standing waves in a string were determined from the experimental data and also predicted from the wave equation with the boundary and initial conditions corresponding to the initial shape of the string.

Cited by 27

QUANTUM HALL PHYSICS IN STRING THEORY

Oren Bergman · arXiv (Cornell University) · 2004

In certain backgrounds string theory exhibits quantum Hall-like behavior. These backgrounds provide an explicit realization of the effective non-commutative gauge theory description of the fractional quantum Hall effect (FQHE), and of the corresponding large N matrix model. I review results on the string theory realization of the two-dimensional fractional quantum Hall fluid (FQHF), and describe new results on the stringy description of higher-dimensional analogs.

Cited by 6Open access

Gauge/string duality and hadronic physics

Henrique Boschi-Filho, Nelson R. F. Braga · Brazilian Journal of Physics · 2007

We review some recent results on phenomenological approaches to strong interactions inspired in gauge/string duality. In particular, we discuss how such models lead to very good estimates for hadronic masses.

Cited by 6Open access

SECOND QUANTIZATION IN BIT STRING PHYSICS

H. Pierre Noyes · University of North Texas Digital Library (University of North Texas) · 1992

Using a new fundamental theory based on bit-strings, a finite and discrete version of the solutions of the free one particle Dirac equation as segmented trajectories with steps of length h/mc along the forward and backward light cones executed at velocity +/- c are derived. Interpreting the statistical fluctuations which cause the bends in these segmented trajectories as emission and absorption of radiation, these solutions are analogous to a fermion propagator in a second quantized theory. This allows us to interpret the mass parameter in the step length as the physical mass of the free particle. The radiation in interaction with it has the usual harmonic oscillator structure of a second quantized theory. How these free particle masses can be generated gravitationally using the combinatorial hierarchy sequence (3,10,137,2(sup 127) + 136), and some of the predictive consequences are sketched.

Cited by 3Open access

Gauge/string duality and hadronic physics

Boschi-Filho, Henrique, Braga, Nelson R. F. · arXiv (Cornell University) · 2006

We review some recent results on phenomenological approaches to strong interactions inspired in gauge/string duality. In particular, we discuss how such models lead to very good estimates for hadronic masses.

Cited by 0Open access

Physics of Low Scale String Models

Ignatios Antoniadis · 2003

In critical (ten) dimensions, any consistent superstring theory has two parameters: a mass (or length) scale M s (l s =M s -1) and a dimensionless string coupling λ s given by the vacuum expectation value (VEV) of the dilaton field e = λ s [1,2]: $$D = 10: {\rm M}s = l_s ^{ - 1} \lambda _s .$$ (1.1) Upon compactification in D = 4 dimensions on a compact manifold of volume V, these parameters determine the four-dimensional (4d) Planck mass M p (l p =M p -1) (or length) and the dimensionless gauge coupling g at the string scale. For simplicity, in the following we drop all numerical factors from our formulae, while, when needed, we use the numerical values: $$D = 4: {\rm M}_p \simeq 1.2 \times 10^{19} GeV g \simeq 1/5.$$ (1.2) Moreover, the weakly coupled condition implies that λ s << 1. Our method in the following consists in expressing the 10d parameters (M s ,λ s ) in terms of the 4d ones and the compactification volume, in heterotic (s = H), type I (s = I) and type II (s = II) string theories, and then discuss the conditions on possible large volume or low string scale realizations, keeping the string coupling small.

Cited by 0

Electron string phenomenon: physics and use

E. D. Donets · Journal of Physics Conference Series · 2004

Electron string phenomenon arises as a result of phase transition of a state of multiply reflected electron beam to this new discovered state of one component electron plasma and can be easily observed in the reflex mode of EBIS operation. The transition goes via a strong instability, which causes considerable electron energy spread, which in its turn suppresses the instability. Electron string state is a stationary state of hot pure electron plasma, which is heated by injected electron beam and cooled because of electron loses. Electron string is quiet in broad regions of experimental parameters, so that it is used for confinement and ionization of positive ions by electron impact to highly charge states similar to electron beams in EBIS. Application of electron strings instead of electron beams for ion production allows to save about 99% of electric power of electron beam and simultaneously to improve reliability of an ion source considerably. The JINR EBIS `Krion-2' in the string mode of operation is used for production of N7+, Ar16+ and Fe24+ ion beams and their acceleration to relativistic energies on the facility of the JINR super conducting one turn injection synchrotron `Nuklotron'.

Cited by 6Open access

physics pp. 1105–1114 String cosmology

Jnanadeva Maharana, Sudipta Mukherji · 2015

Abstract. In this review, we discuss various cosmological issues related to our Universe from a string theoretic perspective. We analyse the pre-big bang cosmological scenario which appears nat-urally in this context due to the existence of scale factor duality symmetry in string theory. We then discuss some of the attractive and problematic features of this scenario. Finally, we introduce a method which is powerful enough to search for cosmological solutions in various low energy limits of string theories.

Cited by 0