dc.contributor.advisor | Bulutay, Ceyhun | |
dc.contributor.author | Güldeste, Ekrem Taha | |
dc.date.accessioned | 2018-07-27T11:05:34Z | |
dc.date.available | 2018-07-27T11:05:34Z | |
dc.date.copyright | 2018-07 | |
dc.date.issued | 2018-07 | |
dc.date.submitted | 2018-07-25 | |
dc.identifier.uri | http://hdl.handle.net/11693/47685 | |
dc.description | Cataloged from PDF version of article. | en_US |
dc.description | Thesis (M.S.): Bilkent University, Department of Physics, İhsan Doğramacı Bilkent University, 2018. | en_US |
dc.description | Includes bibliographical references (leaves 36-42). | en_US |
dc.description.abstract | Environmental dynamics in solid state matrix is of much importance for quantum
information processing and storage purposes. Here, we first give a basic recipe to
get Loschmidt echo (LE) which is a measure of decoherence (loss of information
from the qubit) in heterogeneously interacting nuclear spin bath (NSB) in the
presence of Fermi-contact hyperfine and nuclear spin dipole-dipole interactions.
Then, by dropping the latter we discuss the basic dependencies of pure-dephasing
regime on size, initial polarization, hyperfine coupling inhomogeneity, spin quantum
number in nuclear spin environments, and arrive at a phenomenological
expression that governs all these attributes. For NSBs consisting of spin-I ≥ 1,
the effect of nuclear electric quadrupole interaction is also considered where its
biaxiality term has an in
uence on the decoherence process. Furthermore, a general
decoherence channel is also employed to see how phase-
ip rate affects LE.
After insights gained from these models, we consider two generic realistic systems,
namely, donor center and quantum dot and explain the power spectral density of
LE in these cases. | en_US |
dc.description.statementofresponsibility | by Ekrem Taha Güldeste. | en_US |
dc.format.extent | x, 50 leaves : graphics, 30 cm | en_US |
dc.language.iso | English | en_US |
dc.rights | info:eu-repo/semantics/openAccess | en_US |
dc.subject | Qubit Decoherence | en_US |
dc.subject | Central Spin Decoherence | en_US |
dc.subject | Loschmidt Echo | en_US |
dc.subject | Nuclear Spin Baths | en_US |
dc.title | Hyperfine and electric quadrupolar interaction-driven loschmidt echo in nanoscale nuclear spin baths | en_US |
dc.title.alternative | Nano ölçekli spin hamamları için enaltyapı ve dörtkutup etkileşimleri altında loschmidt yankısı | en_US |
dc.type | Thesis | en_US |
dc.department | Department of Physics | en_US |
dc.publisher | Bilkent University | en_US |
dc.description.degree | M.S. | en_US |
dc.identifier.itemid | B158733 | |
dc.embargo.release | 2020-07-25 | |