Sökning: "quantum dissipation"

Visar resultat 21 - 25 av 31 avhandlingar innehållade orden quantum dissipation.

  1. 21. Theoretical studies of collective electronic excitations in low-dimensional structures

    Författare :Zhe Yuan; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; linear atomic chains; hydrogen storage; nanodisks; dielectric response; surface plasmon resonances; electron gas model; electronic excitation; metallic thin films; time-dependent density functional theory;

    Sammanfattning : During the past decade, nanoplasmonics and nanophotonicshas emerged as a new branch of nanosciences with many novelapplications. Central in this development is the localized surface plasmon resonance (LSPR) tunable by the sizes and shapes at nanometer scale. LÄS MER

  3. 22. Van der Waals and Casimir interactions near metal films

    Författare :Mathias Boström; G. D. Mahan; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : This thesis deals with van der Waals and Casimir forces near metal films. Thick, thin and strictly two-dimensional metal films will be investigated. For many applications one can model a double quantum-well structure with two strictly two-dimensional metallic sheets. LÄS MER

  4. 23. Kinetic modeling of runaway-electron dynamics in partially ionized plasmas

    Författare :Linnea Hesslow; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; runaway electrons; tokamaks; plasma physics; magnetic confinement fusion; electron-ion collisions; Fokker-Planck equation;

    Sammanfattning : An essential result of kinetic plasma physics is the runaway phenomenon, whereby a fraction of an electron population can be accelerated to relativistic energies. Such runaway electrons are formed in astrophysical settings, but are also of great practical relevance to fusion research. LÄS MER

  5. 24. Design of superconductor digital circuits for a 30 GHz DSP and for interface to qubits

    Författare :Samuel Intiso; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; VHDL; thermal; RSFQ; noise temperature; Time-delay Optimization; WCDMA; Hierarchycal memory; DSP;

    Sammanfattning : Superconducting digital technology based on Rapid Single Flux Quantum logic (RSFQ) is a digital technology characterized by high speed, low power consumption and low operational temperatures. RSFQ is attractive for many applications and in particular for high frequency Digital Signal Processing (DSP) and for digital control of mK devices like superconducting qubits. LÄS MER

  7. 25. Nonresonant high-frequency actuation of carbon based nanoelectromechanical oscillators

    Författare :Martin Eriksson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; nanoelectromechanical oscillators; graphene; nonresonant; mechanical vibra- tions; selective mode actuation;

    Sammanfattning : Carbon based nanoelectromechanical oscillators outperform their predecessors in many ways. In particular, their extraordinarily high quality factors make them very promising for sensor applications. To operate the nano oscillators, different kinds of actuation mechanisms are utilised, for instance direct or parametric resonance. LÄS MER