Robert Olkiewicz

Dynamics of dissipation

Nonequilibrium Dynamics.- Some Recent Advances in Classical Statistical Mechanics.- Deterministic Thermostats and Flctuation Relations.- What Is the Microscopic Response of a System Driven Far From Equilibrium?.- Non-equilibrium Statistical Mechanics of Classical and Quantum Systems.- Dynamics of Relaxation and Chaotic Behaviour.- Dynamical Theory of Relaxation in Classical and Quantum Systems.- Relaxation and Noise in Chaotic Systems.- Fractal Structures in the Phase Space of Simple Chaotic Systems with Transport.- Dynamical Semigroups.- Markov Semigroups and Their Applications.- Invitation to Quantum Dynamical Semigroups.- Finite Dissipative Quantum Systems.- Complete Positivity in Dissipative Quantum Dynamics.- Quantum Stochastic Dynamical Semigroup.- Driving, Dissipation and Control in Quantum Systems.- Driven Chaotic Mesoscopic Systems, Dissipation and Decoherence.- Quantum State Control in Cavity QED.- Solving Schrodingers Equation for an Open System and Its Environment.- Dynamics of Large Systems.- Thermodynamic Behavior of Large Dynamical Systems.- Coherent and Dissipative Transport in Aperiodic Solids: An Overview.- Scaling Limits of Schrodinger Quantum Mechanics.

Ornstein–Uhlenbeck–Cauchy process

We combine earlier investigations of linear systems subject to Levy fluctuations with recent attempts to give meaning to so-called Levy flights in external force fields. We give a complete construction of the Ornstein–Uhlenbeck–Cauchy process as a fully computable paradigm example of Doob’s stable noise-supported Ornstein–Uhlenbeck process. Despite the nonexistence of all moments, we determine local characteristics (forward drift) of the process, generators of forward and backward dynamics, and relevant (pseudodifferential) evolution equations. The induced nonstationary spatial process is proved to be Markovian and quite apart from its inherent discontinuity defines an associated velocity process in a probabilistic sense.

Decoherence induced transition from quantum to classical dynamics

Framework for a general discussion of environmentally induced classical properties, like superselection rules, privileged basis and classical behavior, in quantum systems with both finite and infinite number of degrees of freedom is proposed. A number of examples showing that classical properties do not have to be postulated as an independent ingredient are given. In particular, it is shown that infinite open quantum systems in some cases may behave like simple classical dynamical systems.

On Uniqueness of the Jump Process in Event Enhanced Quantum Theory

We prove that, in constrast to the theories of continuous observation, in the formalism of event enhanced quantum theory the stochastic process generating sample histories of pairs (observed quantum system, observing classical apparatus) is unique. This result gives a rigorous basis to the previous heuristic argument of Blanchard and Jadczyk.

Structure of the Algebra of Effective Observables in Quantum Mechanics

Abstract A subclass of dynamical semigroups induced by the interaction of a quantum system with an environment is introduced. Such semigroups lead to the selection of a stable subalgebra of effective observables. The structure of this subalgebra is completely determined.

Decoherence-induced continuous pointer states

We investigate the reduced dynamics in the Markovian approximation of an infinite quantum spin system linearly coupled to a phonon field at positive temperature. The achieved diagonalization leads to a selection of the continuous family of pointer states corresponding to a configuration space of the one-dimensional Ising model. Such a family provides a mathematical description of an apparatus with continuous readings.

Cauchy noise and affiliated stochastic processes

By departing from the previous attempt [Phys. Rev. E 51, 4114 (1995)] we give a detailed construction of conditional and perturbed Markov processes, under the assumption that the Cauchy law of probability replaces the Gaussian law (appropriate for the Wiener process) as the model of primordial noise. All considered processes are regarded as probabilistic solutions of the so-called Schrodinger interpolation problem, whose validity is thus extended to the jump-type processes and their step process approximants.

Dissipative dynamics for quantum spin systems on a lattice

We show that for a large class of interactions there exist translation-invariant dissipative dynamics which satisfy the detailed balance condition (in the associated noncommutative symmetric space), which do not commute with Hamiltonian dynamics and have exponential decay to equilibrium in the high-temperature region.

From quantum to quantum via decoherence

Various physical effects resulting from decoherence are discussed in the algebraic framework. In particular, it is shown that the environment may induce not only classical properties like superselection rules, pointer states or even classical behavior of the quantum system, but, what is more, it also allows the transition from statistical description of infinite quantum systems to quantum mechanics of systems with a finite number of degrees of freedom. It is shown that such transition holds for the quantum spin system in the thermodynamic limit interacting with the phonon field.

Interacting Quantum and Classical Continuous Systems I. The Piecewise Deterministic Dynamics

A mathematical construction of a Markov–Feller process associated with a completely positive coupling between classical and quantum systems is proposed. The example of the free classical particle on the Lobatchevski space Q interacting with the quantum system characterized by coherent states on Q is considered.