Ljós og leiðni í rafeindakerfum á nanóskala / Light and transport in electronic systems on the nanoscale - verkefni lokið
Fréttatilkynning verkefnisstjóra
The project: „Light and transport in electronic systems on the nanoscale'“ was finished by the end of 2013. In the project the principal investigator together with students and collaborators modeled time-dependent transport of electrons through nanosystems in photon cavities.
Heiti verkefnis: Ljós og leiðni í rafeindakerfum á nanóskala / Light and transport in electronic systems on the nanoscale
Verkefnisstjóri: Viðar Guðmundsson, Raunvísindastofnun Háskólans
Tegund styrks: Verkefnisstyrkur
Styrkár: 2011-2013
Fjárhæð styrks: 14.715 millj. kr.
Tilvísunarnúmer Rannís: 110011021
The mutual Coulomb interaction of the electrons and their interaction with the photons were treated numerically exactly in a truncated many-body Fock-space. The study shows that quantum interference effects, like the Aharonov-Bohm and Aharonov-Casher effects, can be magnified or diminished by the cavity photons. The transport of electrons can be assisted or inhibited by cavity photons, depending on their initial number, energy and polarization. Quantum gate operations can be performed in a double waveguide system with a coupling window in a photon cavity. Their type can be controlled by the photon number and their polarization, and the size of the coupling window.
All the results of the project have been published in international peer-reviewed physics and engineering journals:
Time-dependent magnetotransport in semiconductor nanostructures via the generalized master equation
Computer Physics Communications 182, 46 (2011)
Magnetotransport in a time-modulated double quantum point contact system
Computer Physics Communications 182, 65 (2011)
Turnstile pumping through an open quantum wire
New Journal of Physics 13, 013014 (2011)
Quantum magneto-electrodynamics of electrons embedded in a photon cavity
New Journal of Physics, 14, 013036 (2012)
Time-dependent transport of electrons through a photon cavity
Phys. Rev. B 85, 075306 (2012)
Generalized Master equation approach to mesoscopic time-dependent transport
J. Phys.: Conf. Ser. 338, 012017 (2012)
Excitation of collective modes in a quantum flute
Phys. Rev. B 85, 245114 (2012)
Nonperturbative Approach to Circuit Quantum Electrodynamics
Phys. Rev. E 86, 046701 (2012)
Symmetric excitation and de-excitation of a cavity QED system
The European Physical Journal B 86, 291 (2013)
Magnetic-field influenced non-equilibrium transport through a quantum ring with correlated electrons in a photon cavity
Phys. Rev. B 87, 035314 (2013)
Stepwise introduction of model complexity in a generalized master equation approach to time-dependent transport
Fortschritte der Physik 61, no 2-3, 305 (2013)
Thermoelectric Current and Coulomb-Blockade Plateaus in a Quantum Dot
Physica E 53, 178 (2013)
Electron transport through a quantum dot assisted by cavity photons
The Journal of Physics: Condensed Matter 25, 465302 (2013)
Impact of a circularly polarized cavity photon field on the charge and spin flow through an Aharonov-Casher ring
Physica E 60, 170 (2014)
Effects of geometry and linearly polarized cavity photons on the charge and spin currents in a quantum ring with spin-orbit interactions
The European Physical Journal B 87, 113 (2014)
Excitation of radial collective modes in a quantum dot: Beyond linear response
Annalen der Physik 526, 235 (2014)
Delocalization of electrons by cavity photons in transport through a quantum dot molecule
Physica E 64, 254 (2014)
Excitation spectra of a quantum ring embedded in a photon cavity
Journal of Optics 16, in press (2014), (arXiv:1410.0174)
Coherent transient transport of interacting electrons through a quantum waveguide switch
The Journal of Physics: Condensed Matter 27, 015301 (2015)
Cavity-photon-switched coherent transient transport in a double quantum waveguide
(2014) (arXiv:1410.4890)
Nonperturbative Approach to Circuit Quantum Electrodynamics
http://hdl.handle.net/1946/10771
Variations on Transport for a Quantum Flute
http://hdl.handle.net/1946/14320
The influence of cavity photons on the transient transport of correlated electrons through a quantum ring with magnetic field and spin-orbit interaction
http://hdl.handle.net/1946/19358
