FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W95731708> ?p ?o ?g. }

• W95731708 abstract "The model of a two-level system (TLS) coupled to a harmonic oscillator has found a widespread application in physics and chemistry. In this thesis we focus on the field of circuit quantum electrodynamics where the TLS stands for a quantum bit (qubit), which is the basic building unit of a potential quantum computer, and the oscillator represents a transmission-line resonator, which can be used, e.g., to store information contained on the qubit or for communication between several qubits. Furthermore, the oscillator can model a superconducting quantum interference device (SQUID) determining the state of the qubit.In first experimental realizations the coupling between the qubit and the oscillator was small compared to characteristic frequencies of the two devices. In such a situation the Jaynes-Cummings model provides a realistic and completely analytical description of the energy spectrum and the dynamics of the setup. However, it relies on a rotating-wave approximation (RWA) which neglects counter-rotating terms in the full qubit-oscillator Hamiltonian. These counter-rotating terms become important under increase of the coupling strength, as it has been achieved in recent experiments. We present two analytical approaches to take these additional contributions into account: The first one treats the qubit-oscillator Hamiltonian perturbatively in the coupling strength and predicts a frequency shift in its energy spectrum, the Bloch-Siegert shift. The second one considers the qubit's tunneling splitting as small parameter and thus treats the problem to all orders in the coupling allowing to enter the ultrastrong coupling regime, where the coupling strength becomes comparable to the qubit's and/or oscillator's frequency. For both cases we give a thorough analysis of the qubit's dynamics.In order to perform operations the qubit is usually probed by an external driving force. We model this situation by coupling the TLS to a classical oscillator and examine the resulting time dependent Hamiltonian using a combination of Floquet theory and Van Vleck perturbation theory. Thus, we provide an analysis of the qubit's energy spectrum and dynamics which is nonperturbative in the driving amplitude. We investigate effects like coherent destruction of tunneling and driving-inducing tunneling oscillations.By coupling the driven TLS to a quantized oscillator we give for the first time an analytical treatment of the qubit-oscillator system being simultaneously exposed to both ultrastrong coupling and extreme driving. We observe interesting phenomena in the dynamics like the suppression of specific frequencies under a variation of the coupling strength.To mimic environmental influences on the qubit we apply the Caldeira-Leggett master equation approach to the driven TLS and to the qubit-oscillator system and provide for both cases analytical expressions for the relaxation and dephasing rates." @default.
• W95731708 created "2016-06-24" @default.
• W95731708 creator A5010146522 @default.
• W95731708 date "2010-12-03" @default.
• W95731708 modified "2023-09-27" @default.
• W95731708 title "Dissipative dynamics of a qubit-oscillator system in the ultrastrong coupling and driving regimes" @default.
• W95731708 hasPublicationYear "2010" @default.
• W95731708 type Work @default.
• W95731708 sameAs 95731708 @default.
• W95731708 citedByCount "0" @default.
• W95731708 crossrefType "dissertation" @default.
• W95731708 hasAuthorship W95731708A5010146522 @default.
• W95731708 hasConcept C109546105 @default.
• W95731708 hasConcept C121332964 @default.
• W95731708 hasConcept C126255220 @default.
• W95731708 hasConcept C130787639 @default.
• W95731708 hasConcept C203087015 @default.
• W95731708 hasConcept C2781190263 @default.
• W95731708 hasConcept C3079626 @default.
• W95731708 hasConcept C33923547 @default.
• W95731708 hasConcept C40934718 @default.
• W95731708 hasConcept C62520636 @default.
• W95731708 hasConcept C73214911 @default.
• W95731708 hasConcept C84114770 @default.
• W95731708 hasConcept C85608146 @default.
• W95731708 hasConceptScore W95731708C109546105 @default.
• W95731708 hasConceptScore W95731708C121332964 @default.
• W95731708 hasConceptScore W95731708C126255220 @default.
• W95731708 hasConceptScore W95731708C130787639 @default.
• W95731708 hasConceptScore W95731708C203087015 @default.
• W95731708 hasConceptScore W95731708C2781190263 @default.
• W95731708 hasConceptScore W95731708C3079626 @default.
• W95731708 hasConceptScore W95731708C33923547 @default.
• W95731708 hasConceptScore W95731708C40934718 @default.
• W95731708 hasConceptScore W95731708C62520636 @default.
• W95731708 hasConceptScore W95731708C73214911 @default.
• W95731708 hasConceptScore W95731708C84114770 @default.
• W95731708 hasConceptScore W95731708C85608146 @default.
• W95731708 hasLocation W957317081 @default.
• W95731708 hasOpenAccess W95731708 @default.
• W95731708 hasPrimaryLocation W957317081 @default.
• W95731708 hasRelatedWork W1965799067 @default.
• W95731708 hasRelatedWork W1968773954 @default.
• W95731708 hasRelatedWork W1980189778 @default.
• W95731708 hasRelatedWork W2028462954 @default.
• W95731708 hasRelatedWork W2055476412 @default.
• W95731708 hasRelatedWork W2074342556 @default.
• W95731708 hasRelatedWork W2077908504 @default.
• W95731708 hasRelatedWork W2078929052 @default.
• W95731708 hasRelatedWork W2229692087 @default.
• W95731708 hasRelatedWork W2245739573 @default.
• W95731708 hasRelatedWork W2274569596 @default.
• W95731708 hasRelatedWork W2279405230 @default.
• W95731708 hasRelatedWork W2316702808 @default.
• W95731708 hasRelatedWork W2342471810 @default.
• W95731708 hasRelatedWork W2889955174 @default.
• W95731708 hasRelatedWork W2942624318 @default.
• W95731708 hasRelatedWork W2963720127 @default.
• W95731708 hasRelatedWork W3098453937 @default.
• W95731708 hasRelatedWork W3199945119 @default.
• W95731708 hasRelatedWork W659020668 @default.
• W95731708 isParatext "false" @default.
• W95731708 isRetracted "false" @default.
• W95731708 magId "95731708" @default.
• W95731708 workType "dissertation" @default.