Single-shot readout of a single nuclear spin.
Projective measurement of single electron and nuclear spins has evolved from a gedanken experiment to a problem relevant for applications in atomic-scale technologies like quantum computing. Although several approaches allow for detection of a spin of single atoms and molecules, multiple repetitions of the experiment that are usually required for achieving a detectable signal obscure the intrinsic quantum nature of the spin's behavior. We demonstrated single-shot, projective measurement of a single nuclear spin in diamond using a quantum nondemolition measurement scheme, which allows real-time observation of an individual nuclear spin's state in a room-temperature solid. Such an ideal measurement is crucial for realization of, for example, quantum error correction protocols in a quantum register.
Neumann
Philipp
P
3rd Physics Institute and Research Center SCoPE, University of Stuttgart, Pfaffenwaldring 57, Stuttgart 70550, Germany.
Beck
Johannes
J
Steiner
Matthias
M
Rempp
Florian
F
Fedder
Helmut
H
Hemmer
Philip R
PR
Wrachtrup
Jörg
J
Jelezko
Fedor
F