Zobrazeno 1 - 10
of 60
pro vyhledávání: '"Lemmens, L F"'
Autor:
Lemmens, L. F., Bakar, Burhan
Publikováno v:
AIP Conf. Proc. 872, 55 (2006)
The evolution of a quantum system, appropriate to describe nano-magnets, can be mapped on a Markov process, continuous in $\beta$. The mapping implies a probability assignment that can be used to study the probability density (PDF) of the magnetizati
Externí odkaz:
http://arxiv.org/abs/cond-mat/0610666
Autor:
Bakar, Burhan, Lemmens, L. F.
Publikováno v:
Phys. Rev. E 71, 046109 (2005)
A recent study of nonextensive phase transitions in nuclei and nuclear clusters needs a probability model compatible with the appropriate Hamiltonian. For magnetic molecules a representation of the evolution by a Markov process achieves the required
Externí odkaz:
http://arxiv.org/abs/cond-mat/0502277
For fermions with degenerate single-particle energy levels, the usual relation between the total number of particles and the chemical potential $\mu $ is only satisfied for a specific number of particles, i.e. those leading to closed shells. The trea
Externí odkaz:
http://arxiv.org/abs/cond-mat/0303546
For a fermion gas with equally spaced energy levels that is subjected to a magnetic field, the particle density is calculated. The derivation is based on the path integral approach for identical particles, in combination with the inversion techniques
Externí odkaz:
http://arxiv.org/abs/cond-mat/0009442
In this addendum we introduce the concept of time-inversion referencing. This is an extension of hypertext allowing authors to cite papers that where not yet published (or even not yet written) when they publish a manuscript. We are convinced that th
Externí odkaz:
http://arxiv.org/abs/cond-mat/0004335
Publikováno v:
Phys. Rev. A 55, 2453 (1997)
Based on the Hellman-Feynman theorem it is shown that the average square radius of a cloud of interacting bosons in a parabolic well can be derived from their free energy. As an application, the temperature dependence of the moment of inertia of non-
Externí odkaz:
http://arxiv.org/abs/cond-mat/0004208
We present numerically exact energy estimates for two-dimensional electrons in a parabolic confinement. By application of an extension of the recently introduced many-body diffusion algorithm, the ground-state energies are simulated very efficiently.
Externí odkaz:
http://arxiv.org/abs/cond-mat/0002343
For a spinor gas, i.e., a mixture of identical particles with several internal degrees of freedom, we derive the partition function in terms of the Feynman-Kac functionals of polarized components. As an example we study a spin-1 Bose gas with the spi
Externí odkaz:
http://arxiv.org/abs/cond-mat/0001286
Publikováno v:
Phys. Rev. A 61, 043605 (2000)
For a gas of N bosons interacting through a two-body Morse potential a variational bound of the free energy of a confined system is obtained. The calculation method is based on the Feynman-Kac functional projected on the symmetric representation. Wit
Externí odkaz:
http://arxiv.org/abs/cond-mat/9911210
For confined systems of identical particles, either bosons or fermions, we argue that the parabolic nature of the confinement potential is a prerequisite for the non-dissipative character of the center of mass response to a uniform probe. For an exci
Externí odkaz:
http://arxiv.org/abs/cond-mat/9901102