Zobrazeno 1 - 10
of 339
pro vyhledávání: '"Rasetti, M."'
We explore a variety of reasons for considering su(1,1) instead of the customary h(1) as the natural unifying frame for characterizing boson systems. Resorting to the Lie-Hopf structure of these algebras, that shows how the Bose-Einstein statistics f
Externí odkaz:
http://arxiv.org/abs/1406.2908
Publikováno v:
J.Phys.A40:3047-3066,2007
Motivated by algorithmic problems arising in quantum field theories whose dynamical variables are geometric in nature, we provide a quantum algorithm that efficiently approximates the colored Jones polynomial. The construction is based on the complet
Externí odkaz:
http://arxiv.org/abs/quant-ph/0607203
We construct a quantum algorithm to approximate efficiently the colored Jones polynomial of the plat presentation of any oriented link L at a fixed root of unity q. Our construction is based on SU(2) Chern-Simons topological quantum field theory (and
Externí odkaz:
http://arxiv.org/abs/quant-ph/0606167
Publikováno v:
Laser Physics Vol. 16 No. 11 (2006) 1582-1594
We analyze the connections between the mathematical theory of knots and quantum physics by addressing a number of algorithmic questions related to both knots and braid groups. Knots can be distinguished by means of `knot invariants', among which the
Externí odkaz:
http://arxiv.org/abs/quant-ph/0606137
Publikováno v:
J. Phys. B: At. Mol. Opt. Phys. 34 (2001) 4697-4710
The thermodynamic properties of non interacting bosons on a complex network can be strongly affected by topological inhomogeneities. The latter give rise to anomalies in the density of states that can induce Bose-Einstein condensation in low dimensio
Externí odkaz:
http://arxiv.org/abs/cond-mat/0201127
Publikováno v:
Europhys. Lett., 52, 251 (2000)
We show that spatial Bose-Einstein condensation of non-interacting bosons occurs in dimension d < 2 over discrete structures with inhomogeneous topology and with no need of external confining potentials. Josephson junction arrays provide a physical r
Externí odkaz:
http://arxiv.org/abs/cond-mat/0004100
Publikováno v:
Phys.Lett. A244 (1998) 455-461
The algebraic structure of Thermo Field Dynamics lies in the $q$-deformation of the algebra of creation and annihilation operators. Doubling of the degrees of freedom, tilde-conjugation rules, and Bogoliubov transformation for bosons and fermions are
Externí odkaz:
http://arxiv.org/abs/hep-th/9801031
Autor:
Zanardi, P., Rasetti, M.
Publikováno v:
Mod. Phys. Lett. B, 25, 1085 (1997)
The existence is proved of a class of open quantum systems that admits a linear subspace ${\cal C}$ of the space of states such that the restriction of the dynamical semigroup to the states built over $\cal C$ is unitary. Such subspace allows for err
Externí odkaz:
http://arxiv.org/abs/quant-ph/9710041
Autor:
Zanardi, P., Rasetti, M.
We argue that several claims of paper Phys. Rev. Lett 79, 1953 (1997), by Lu-Ming Duan and Guang-Can Guo, are questionable. In particular we stress that the environmental noise considered by the authors belongs to a very special class
Comment: 2
Comment: 2
Externí odkaz:
http://arxiv.org/abs/quant-ph/9710002
Autor:
Zanardi, P., Rasetti, M.
Publikováno v:
Phys.Rev.Lett.79:3306-3309,1997
In this paper we study a model quantum register $\cal R$ made of $N$ replicas (cells) of a given finite-dimensional quantum system S. Assuming that all cells are coupled with a common environment with equal strength we show that, for $N$ large enough
Externí odkaz:
http://arxiv.org/abs/quant-ph/9705044