Zobrazeno 1 - 10
of 32
pro vyhledávání: '"Barci, D. G."'
Publikováno v:
International Journal of Modern Physics A, vol.9, p.3497 (1994)
We consider a tachyon field whose Fourier components correspond to spatial momenta with modulus smaller than the mass parameter. The plane wave solutions have them a time evolution which is a real exponential. The field is quantized and the solution
Externí odkaz:
http://arxiv.org/abs/1708.03185
Publikováno v:
Il Nuovo Cimento A, vol.106, p.603 (1993)
Following the canonical quantization procedure for a tachyon field, the usual Hamiltonian and the creation and annihilation operators are obtained. The observation that the mass hyperboloid $p^2-m^2=0$ is one-sheeted, as opposed to the case of bradyo
Externí odkaz:
http://arxiv.org/abs/1708.03192
Publikováno v:
J.Phys.A36:4927-4936,2003
We introduce a gauge invariant and string independent two-point fermion correlator which is analyzed in the context of the Schwinger model (QED_2). We also derive an effective infrared worldline action for this correlator, thus enabling the computati
Externí odkaz:
http://arxiv.org/abs/hep-th/0301197
Publikováno v:
Laser Phys. 12 (2002) 43-49
We provide a detailed description of the nonequilibrium time evolution of an interacting homogeneous Bose-Einstein condensate. We use a nonperturbative in-medium quantum field theory approach as a microscopic model for the Bose gas. The real-time dyn
Externí odkaz:
http://arxiv.org/abs/cond-mat/0104463
We analyze the universal transport behavior in 1D and 2D fermionic systems by following the unified framework provided by bosonization. The role played by the adiabatic transition between interacting and noninteracting regions is emphasized.
Com
Com
Externí odkaz:
http://arxiv.org/abs/hep-th/0012161
Publikováno v:
Nucl.Phys.B600:203,2001
The coefficient of the Chern-Simons term in the effective action for massive Dirac fermions in three dimensions is computed by using the point-splitting regularization method. We show that in this framework no ambiguities arise. This is related to th
Externí odkaz:
http://arxiv.org/abs/hep-th/0011154
Publikováno v:
Int.J.Mod.Phys.A15:4655-4680,2000
We analyze the universality of the bosonization rules in non-relativistic fermionic systems in $(2+1)d$. We show that, in the case of linear fermionic dispersion relations, a general fermionic theory can be mapped into a gauge theory in such a way th
Externí odkaz:
http://arxiv.org/abs/cond-mat/9907193
Autor:
Alamoudi, S. M., Barci, D. G., Boyanovsky, D., de Carvalho, C. A. A., Fraga, E. S., Joras, S. E., Takakura, F. I.
Publikováno v:
Phys. Rev. D 60, 125003 (1999)
We study the viscosity corrections to the growth rate of nucleating bubbles in a first order phase transition in scalar field theory. We obtain the non-equilibrium equation of motion of the coordinate that describes small departures from the critical
Externí odkaz:
http://arxiv.org/abs/hep-ph/9904390
Publikováno v:
Phys.Rev.D59:105012,1999
General results on the structure of the bosonization of fermionic systems in $(2+1)$d are obtained. In particular, the universal character of the bosonized topological current is established and applied to generic fermionic current interactions. The
Externí odkaz:
http://arxiv.org/abs/hep-th/9811068
Publikováno v:
Phys.Rev. B58 (1998) 10921-10932
We analyze the electromagnetic response of a system of charged bosons coupled to a Chern-Simons gauge field. Path integral techniques are used to obtain an effective action for the particle density of the system dressed with quantum fluctuations of t
Externí odkaz:
http://arxiv.org/abs/cond-mat/9805033