title: Coherent Population Trapping of a Single Nuclear Spin Under Ambient Conditions.
abstract: We demonstrate coherent population trapping of a single nuclear spin in a room-temperature solid. To this end, we exploit a three-level system with a Λ configuration in the microwave domain, which consists of nuclear spin states addressed through their hyperfine coupling to the electron spin of a single nitrogen-vacancy defect in diamond. Moreover, the Λ-scheme relaxation is externally controlled through incoherent optical pumping and separated in time from consecutive coherent microwave excitations. Such a scheme allows us (i) to monitor the sequential accumulation of population into the dark state and (ii) to reach a novel regime of coherent population trapping dynamics for which periodic arrays of dark resonances can be observed, owing to multiple constructive interferences. This Letter offers new prospects for quantum state preparation, information storage in hybrid quantum systems, and metrology.
authors.affiliation: Laboratoire Aimé Cotton, CNRS, Université Paris-Sud, ENS Cachan, Université Paris-Saclay91405 Orsay Cedex, France.
authors.forename: P
authors.initials: P
authors.lastname: Jamonneau
authors.affiliation: Laboratoire Aimé Cotton, CNRS, Université Paris-Sud, ENS Cachan, Université Paris-Saclay91405 Orsay Cedex, France.|Laboratoire Pierre Aigrain, CNRS, Université Pierre et Marie Curie, Université Paris Diderot and Ecole Normale Supérieure, 75005 Paris, France.
authors.forename: G
authors.initials: G
authors.lastname: Hétet
authors.affiliation: Laboratoire Aimé Cotton, CNRS, Université Paris-Sud, ENS Cachan, Université Paris-Saclay91405 Orsay Cedex, France.
authors.forename: A
authors.initials: A
authors.lastname: Dréau
authors.affiliation: Laboratoire Aimé Cotton, CNRS, Université Paris-Sud, ENS Cachan, Université Paris-Saclay91405 Orsay Cedex, France.
authors.forename: J-F
authors.initials: JF
authors.lastname: Roch
authors.affiliation: Laboratoire Aimé Cotton, CNRS, Université Paris-Sud, ENS Cachan, Université Paris-Saclay91405 Orsay Cedex, France.|Laboratoire Charles Coulomb, Université de Montpellier and CNRS, 34095 Montpellier, France.
authors.forename: V
authors.initials: V
authors.lastname: Jacques