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日時：2014年10月21日（火）
17時00分～18時00分
場所：14-202
講師：松崎 雄一郎 博士
(NTT物性科学基礎研究所)
“Improving the lifetime of the NV center ensemble coupled with a
superconducting flux qubit by applying magnetic fields”
Abstract:
One of the promising systems to realize quantum computation is a hybrid
system where a superconducting flux qubit plays a role of a quantum
processor and the NV center ensemble is used as a quantum memory. We
have theoretically and experimentally studied the effect of magnetic
fields on the hybrid system, and found that the lifetime of the vacuum
Rabi oscillation of this system is improved by applying a few mT
magnetic fields to the NV center ensemble. Here, we construct a
theoretical model to reproduce the vacuum Rabi with/without
magnetic fields applied to the NV centers, and we determine the reason
why magnetic fields can affect the coherent properties of the NV center
ensemble. From our theoretical analysis, we quantitatively show that the
magnetic fields actually suppress the inhomogeneous broadening from the
strain in the NV centers.
問合せ先
物理学科 遠藤（rugusuudone@a2.keio.jp）