講演者：Sahel Ashhab (Frontier Research System, RIKEN, Japan)
講演題目：Dynamics and decoherence of a qubit coupled to a quantum two-level system
概要：Recent experiments have found evidence of quantum-coherent
two-level systems (TLSs) in a qubit's environment. I will discuss the dynamics of a qubit in the presence of an uncontrollable quantum TLS.
Depending on the different parameters in the problem, such as the qubit-TLS coupling strength and the various decoherence times, the two-level system can simply contribute to the total qubit decoherence times or it could qualitatively modeify the qubit dynamics. I will consider several different cases and analyze the effect of the TLS in each one of them.