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19 papers · 1 filter
Quantum Tunneling of Spin Particles in Periodic Potentials with Asymmetric Twin Barriers
J. -Q. Liang, H. J. W. Mueller-Kirsten, Jian-Ge Zhou +2
The tunneling effect of a periodic potential with an asymmetric twin barrier per period is calculated using the instanton method. The model is derived from the Hamiltonian of a sma…
Application of Instantons: Quenching of Macroscopic Quantum Coherence and Macroscopic Fermi-Particle Configurations
J. -Q. Liang, H. J. W. Mueller-Kirsten, Jian-Ge Zhou
Starting from the coherent state representation of the evolution operator with the help of the path-integral, we derive a formula for the low-lying levels $E = ε_0 - 2\triangleεcos…
M-branes, anti-M-branes and nonextremal black holes
Jian-Ge Zhou, H. J. W. Mueller-Kirsten, J. -Q. Liang +1
An M-brane and anti-M-brane scheme is proposed to study nonextremal 4D and 5D black holes. The improved nonextremal intersecting M-brane solutions proposed here, involve two sets o…
Gravitational interaction to one loop in effective quantum gravity
A. Akhundov, S. Bellucci, A. Shiekh
We carry out the first step of a program conceived, in order to build a realistic model, having the particle spectrum of the standard model and renormalized masses, interaction ter…
Exclusive photo- and electroproduction at HERA as a possible probe of the odderon singularity in QCD
J. Czyzewski, J. Kwiecinski, L. Motyka +1
Theory and phenomenology of the eta_c photo- and electroproduction is developed from the point of view of probing the odderon singularity in QCD which corresponds to the three gluo…
Wigner Function Description of the A.C.-Transport Through a Two-Dimensional Quantum Point Contact
Igor E. Aronov, Gennady P. Berman, David K. Campbell +1
We have calculated the admittance of a two-dimensional quantum point contact (QPC) using a novel variant of the Wigner distribution function (WDF) formalism. In the semiclassical a…