Search for dissertations about: "quantum dissipation"

Showing result 1 - 5 of 30 swedish dissertations containing the words quantum dissipation.

  1. 1. Quantum Chaos and Dissipation in Finite Fermi Systems

    Author : Sergiy Radionov; Matematisk fysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; statistical physics; gravitation; relativity; Mathematical and general theoretical physics; classical mechanics; quantum mechanics; Dissipation; Quantum Chaos; Collective motion; thermodynamics; Matematisk och allmän teoretisk fysik; klassisk mekanik; kvantmekanik; relativitet; statistisk fysik; termodynamik;

    Abstract : We address the problem of the dissipative character of collective motion in finite Fermi systems. We study this problem from the point of view of chaotic features of the fermionic degrees of freedom of the many-body Fermi systems. READ MORE

  2. 2. Resonances, dissipation and decoherence in exotic and artificial atoms

    Author : Mikhail Genkin; Eva Lindroth; Lars Bojer Madsen; Stockholms universitet; []
    Keywords : quantum dissipation; quantum decoherence; open quantum systems; resonances; fysik; Physics;

    Abstract : There are several reasons why exotic and artificial atoms attract the interest of different scientific communities.In exotic atoms, matter and antimatter can coexist for surprisingly long times. Thus, they present a unique natural laboratory for high precision antimatter studies. READ MORE

  3. 3. Information Thermodynamics and Fluctuations in Quantum Dots

    Author : David Barker; NanoLund: Center for Nanoscience; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; stochastic thermodynamics; Maxwell s demon; quantum dot; charge sensing; information; feedback;

    Abstract : In small systems with large fluctuations, the classical description of thermodynamics is no longer sufficient which has led to the development of stochastic thermodynamics. One important result from stochastic thermodynamics is that with measurement and feedback it is possible to use those fluctuations to extract work from a single heat bath coupled to the system. READ MORE

  4. 4. Fluctuations in Mesoscopic Constrictions

    Author : Jan Peter Hessling; Chalmers University of Technology; []
    Keywords : low frequency; fluctuations; quantum; noise; 1 f-noise; superconductivity; impurity; point contact; Andreev reflection; shot noise;

    Abstract : In normal and superconducting quantum point contacts there are several sources of fluctuations. Thermally activated impurities in the vicinity of the junction cause the current (or voltage) to change with a typical frequency of the order of one Hz up to a few kHz. READ MORE

  5. 5. Time-dependent relaxation of charge and energy in electronic nanosystems

    Author : Jens Schulenborg; Chalmers University of Technology; []
    Keywords : heat current; quantum dot; relaxation rate; rate detection; generalization of hermiticity; nonunitary dynamics; open quantum system; Coulomb charging energy; voltage switch; transient response; electronic nanosystem;

    Abstract : The study of the dynamics of strongly confined, interacting open quantum systems has attracted great interest over the past years, due to potential applications in nanoelectronics, metrology as well as quantum information. Most recent experimental and theoretical research in this field has shifted attention towards electronic heat currents, recognizing their potential for practical purposes as well as for tests of fundamental theories, and also aiming to control the inevitable heat dissipation of any dynamically operated electronic device. READ MORE