title: A dressed spin qubit in silicon.
abstract: Coherent dressing of a quantum two-level system provides access to a new quantum system with improved properties-a different and easily tunable level splitting, faster control and longer coherence times. In our work we investigate the properties of the dressed, donor-bound electron spin in silicon, and assess its potential as a quantum bit in scalable architectures. The two dressed spin-polariton levels constitute a quantum bit that can be coherently driven with an oscillating magnetic field, an oscillating electric field, frequency modulation of the driving field or a simple detuning pulse. We measure coherence times of and , one order of magnitude longer than those of the undressed spin. Furthermore, the use of the dressed states enables coherent coupling of the solid-state spins to electric fields and mechanical oscillations.
authors.affiliation: Centre for Quantum Computation and Communication Technology, School of Electrical Engineering and Telecommunications, UNSW Australia, Sydney, New South Wales 2052, Australia.
authors.forename: Arne
authors.initials: A
authors.lastname: Laucht
authors.affiliation: Centre for Quantum Computation and Communication Technology, School of Electrical Engineering and Telecommunications, UNSW Australia, Sydney, New South Wales 2052, Australia.
authors.forename: Rachpon
authors.initials: R
authors.lastname: Kalra
authors.affiliation: Centre for Quantum Computation and Communication Technology, School of Electrical Engineering and Telecommunications, UNSW Australia, Sydney, New South Wales 2052, Australia.
authors.forename: Stephanie
authors.initials: S
authors.lastname: Simmons
authors.affiliation: Centre for Quantum Computation and Communication Technology, School of Electrical Engineering and Telecommunications, UNSW Australia, Sydney, New South Wales 2052, Australia.
authors.forename: Juan P
authors.identifier: 0000-0002-0425-4345
authors.initials: JP
authors.lastname: Dehollain
authors.affiliation: Centre for Quantum Computation and Communication Technology, School of Electrical Engineering and Telecommunications, UNSW Australia, Sydney, New South Wales 2052, Australia.
authors.forename: Juha T
authors.initials: JT
authors.lastname: Muhonen
authors.affiliation: Centre for Quantum Computation and Communication Technology, School of Electrical Engineering and Telecommunications, UNSW Australia, Sydney, New South Wales 2052, Australia.
authors.forename: Fahd A
authors.initials: FA
authors.lastname: Mohiyaddin
authors.affiliation: Centre for Quantum Computation and Communication Technology, School of Electrical Engineering and Telecommunications, UNSW Australia, Sydney, New South Wales 2052, Australia.
authors.forename: Solomon
authors.identifier: 0000-0002-3599-1786
authors.initials: S
authors.lastname: Freer
authors.affiliation: Centre for Quantum Computation and Communication Technology, School of Electrical Engineering and Telecommunications, UNSW Australia, Sydney, New South Wales 2052, Australia.
authors.forename: Fay E
authors.initials: FE
authors.lastname: Hudson
authors.affiliation: School of Fundamental Science and Technology, Keio University, 3-14-1 Hiyoshi, Kanagawa 223-8522, Japan.
authors.forename: Kohei M
authors.initials: KM
authors.lastname: Itoh
authors.affiliation: Centre for Quantum Computation and Communication Technology, School of Physics, University of Melbourne, Melbourne, Victoria 3010, Australia.
authors.forename: David N
authors.initials: DN
authors.lastname: Jamieson
authors.affiliation: Centre for Quantum Computation and Communication Technology, School of Physics, University of Melbourne, Melbourne, Victoria 3010, Australia.
authors.forename: Jeffrey C
authors.initials: JC
authors.lastname: McCallum
authors.affiliation: Centre for Quantum Computation and Communication Technology, School of Electrical Engineering and Telecommunications, UNSW Australia, Sydney, New South Wales 2052, Australia.
authors.forename: Andrew S
authors.initials: AS
authors.lastname: Dzurak
authors.affiliation: Centre for Quantum Computation and Communication Technology, School of Electrical Engineering and Telecommunications, UNSW Australia, Sydney, New South Wales 2052, Australia.
authors.forename: A
authors.identifier: 0000-0001-7445-699X
authors.initials: A
authors.lastname: Morello