Search Results - subject:"Subdynamics"

Kinetic formulation of irreversible evolution of the two-nucleus spin systems

Shirmovsky, S. Eh. - In: Physica A: Statistical Mechanics and its Applications 390 (2011) 18, pp. 3164-3177

framework of the subdynamics theory. The spin systems are determined by the H(1) and C(13) nuclei. The investigation is based on …

Persistent link: https://www.econbiz.de/10010588940

Irreversible evolution of a charged spin 1/2 particle analyzed on the basis of subdynamics theory

Shirmovsky, S. Eh. - In: Physica A: Statistical Mechanics and its Applications 388 (2009) 19, pp. 4000-4016

survey of the irreversible relaxation process of the spin 1/2 particle is carried out on the basis of the subdynamics theory …

Persistent link: https://www.econbiz.de/10010873569

Dynamical equations of quantum information and Gaussian channel

Qiao, Bi; Ruda, H.E.; Zhou, D.Z. - In: Physica A: Statistical Mechanics and its Applications 363 (2006) 2, pp. 198-210

A subdynamic based kinetic equation (SKE) for quantum information density (QID) is presented and using this is shown that the Liouville equation, Master equation and Fokker–Planck equation for QID all share the same formalism as the density operator. This allows one to directly use QID for...

Persistent link: https://www.econbiz.de/10010591492

Irreversible Liouville equation and nonperturbative approach in quantum computing

Qiao, Bi; Ruda, H.E. - In: Physica A: Statistical Mechanics and its Applications 347 (2005) C, pp. 153-167

Having analyzed the role of time-ordering boundary conditions in deriving irreversible kinetic equation a general irreversible Liouville equation is proposed. By this equation a variety of irreversible kinetic equations, such as a stochastic diffusion equation, a irreversible project Liouville...

Persistent link: https://www.econbiz.de/10010589087

Kinetic equations for quantum information

Qiao, Bi; Xing, X.S.; Ruda, H.E. - In: Physica A: Statistical Mechanics and its Applications 355 (2005) 2, pp. 319-332

We study several kinetic equations for quantum information density (QID) based on the classical dynamical statistical information theory (Trans. Beijing Inst. Technol. 24 (2004) 1; Acta Phys. Scinica 53 (2004) 2852). We find that the Liouville equation, SKE and quantum Fokker–Planck equation...

Persistent link: https://www.econbiz.de/10010591794

Nonlinear Liouville equation, project Green function and stabilizing quantum computing

Qiao, Bi; Ruda, H.E. - In: Physica A: Statistical Mechanics and its Applications 333 (2004) C, pp. 197-224

Using the kinetic equation of subdynamics and the principle of maximal entropy we derive a type of nonlinear Liouville … function (GF) by the similarity operators in subdynamics. There are parallel structure and relations between PGF and GF …

Persistent link: https://www.econbiz.de/10010591006

Nonlinear conductivity for mesoscopic systems

Qiao, Bi; Ruda, Harry E.; Xianghua, Zeng - In: Physica A: Statistical Mechanics and its Applications 311 (2002) 3, pp. 429-442

A generalized Kubo formula for a mesoscopic system is derived describing the conductivity, subject to an (not weak) external electric field, and shown to be expressible in the Landauer–Büttiker form. Using this approach the electrical conductivity of a quantum dot point-contact was expressed...

Persistent link: https://www.econbiz.de/10011063188