We study noncommutative open string (NCOS) theories realized in string theory with time-dependent backgrounds. Starting from a noncommutative YangMills theory (NCYM) with a constant space-space noncommutativity but in a time-dependent background and making an S-dual transformation, we show that the resulting theory is an NCOS also in a time-dependent background but now with a time-dependent tim...

In this paper we perform some non-trivial tests for the recently obtained open membrane/Dbrane metrics and ‘generalized’ noncommutativity parameters using Dp/NS5/M5-branes which have been deformed by light-like fields. The results obtained give further evidence that these open membrane/D-brane metrics and ‘generalized’ noncommutativity parameters are correct. Further, we use the open brane data...

This paper considers the effects of space noncommutativity on the thermodynamics of a Reissner-Nordström black hole. In the first step, we extend the ordinary formalism of Bekenstein-Hawking to the case of charged black holes in commutative space. In the second step we investigate the effects of space noncommutativity and the generalized uncertainty principle on the thermodynamics of charged bl...

The model of dynamical noncommutativity is proposed. The system consists of two interrelated parts. The first of them describes the physical degrees of freedom with coordinates q 1 , q 2 , the second one corresponds to the noncommutativity r which has a proper dynamics. After quantization the commutator of two physical coordinates is proportional to the function of r. The interesting feature of...

Here we present an overview on the various works, in which many collaborators have contributed, regarding interesting dipole of noncommutativity and physics. In brief, features that triggers both fields gravity particle physics, from a matrix-realized perspective, with notion noncommutative gauge theories to play most central role whole picture. Also, under framework noncommutativity, examine p...

We consider adelic approach to strings and spatial noncommutativity. Path integral method to string amplitudes is emphasized. Uncertainties in spatial measurements in quantum gravity are related to noncommutativity between coordinates. p-Adic and adelic Moyal products are introduced. In particular, p-adic and adelic counterparts of some real noncommutative scalar solitons are constructed.

The possibility of testing spatial noncommutativity by current experiments on normal quantum scales is investigated. For the case of both position-position and momentum-momentum noncommuting spectra of ions in crossed electric and magnetic fields are studied in the formalism of noncommutative quantum mechanics. In a limit of the kinetic energy approaching its lowest eigenvalue this system posse...

In this study, we investigate the effects of noncommutative Quantum Mechanics in three dimensions on energy levels a charged isotropic harmonic oscillator presence uniform magnetic field z-direction. The extension problem to proves be non-trivial. We obtain first-order corrections energy-levels closed form low limit weak noncommutativity. most important result can note is that all due noncommut...