title: Experimental implementation of assisted quantum adiabatic passage in a single spin.
abstract: Quantum adiabatic passages can be greatly accelerated by a suitable control field, called a counter-diabatic field, which varies during the scan through resonance. Here, we implement this technique on the electron spin of a single nitrogen-vacancy center in diamond. We demonstrate two versions of this scheme. The first follows closely the procedure originally proposed by Demirplak and Rice [J. Phys. Chem. A 107, 9937 (2003)]. In the second scheme, we use a control field whose amplitude is constant but whose phase varies with time. This version, which we call the rapid-scan approach, allows an even faster passage through resonance and therefore makes it applicable also for systems with shorter decoherence times.
authors.affiliation: Fakultät Physik, Technische Universität Dortmund, D-44221 Dortmund, Germany.
authors.forename: Jingfu
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Fakultät Physik, Technische Universität Dortmund, D-44221 Dortmund, Germany.
authors.forename: Jeong Hyun
authors.initials: JH
authors.lastname: Shim
authors.affiliation: Fakultät Physik, Technische Universität Dortmund, D-44221 Dortmund, Germany.
authors.forename: Ingo
authors.initials: I
authors.lastname: Niemeyer
authors.affiliation: National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Taniguchi
authors.affiliation: National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Teraji
authors.affiliation: Japan Atomic Energy Agency, 1233 Watanuki, Takasaki, Gunma 370-1292, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Abe
authors.affiliation: Japan Atomic Energy Agency, 1233 Watanuki, Takasaki, Gunma 370-1292, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Onoda
authors.affiliation: Japan Atomic Energy Agency, 1233 Watanuki, Takasaki, Gunma 370-1292, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Yamamoto
authors.affiliation: Japan Atomic Energy Agency, 1233 Watanuki, Takasaki, Gunma 370-1292, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Ohshima
authors.affiliation: Research Center for Knowledge Communities, University of Tsukuba, Tsukuba 305-8550, Japan.
authors.forename: J
authors.initials: J
authors.lastname: Isoya
authors.affiliation: Fakultät Physik, Technische Universität Dortmund, D-44221 Dortmund, Germany.
authors.forename: Dieter
authors.initials: D
authors.lastname: Suter