Driven coherent oscillations of a single electron spin in a quantum dot

By F H L Koppens, C. Buizert, Klaas-Jan Tielrooij, I. T. Vink, K. Nowack, T. Meunier, L. Kouwenhoven, Lieven M. K. Vandersypen. Nature, 2006

1,119 citations recorded by the source corpus.

The ability to control the quantum state of a single electron spin in a quantum dot is at the heart of recent developments towards a scalable spin-based quantum computer. In combination with the recently demonstrated controlled exchange gate between two neighbouring spins, driven coherent single spin rotations would permit universal quantum operations. Here, we report the experimental realization of single electron spin rotations in a double quantum dot. First, we apply a continuous-wave oscillating magnetic field, generated on-chip, and observe electron spin resonance in spin-dependent transport measurements through the two dots. Next, we coherently control the quantum state of the electron spin by applying short bursts of the oscillating magnetic field and observe about eight oscillations of the spin state (so-called Rabi oscillations) during a microsecond burst. These results demonstrate the feasibility of operating single-electron spins in a quantum dot as quantum bits.

Subfields: Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/30067f08bdf67f1e5eba5beffffb5b7d2064cc28

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Citations in the corpus

Confluence of resonant laser excitation and bidirectional quantum-dot nuclear-spin polarization (2009, result): “We determine that the striking locking effect of any QD transition to an incident near-resonant laser, which we refer to as dragging, is associated with dynamic nuclear spin polarization (DNSP); in stark contrast to previous experiments [6, 7, 8, 9, 10, 11, 12] the relevant nuclear spin polarization”
Spin qubits in graphene quantum dots (2006, background): “Major experimental breakthroughs have been achieved in recent years using quantum dots formed in semiconductor heterostructures based on GaAs technology [2, 3, 4, 5].”
Optical Properties of Semiconductor Quantum Dots (2008, background): “The dots exhibit exciton-spin memory demonstrating that nanowires are a viable alternative to the system of self-assembled dots with new design options to interface single photon [59, 60] with single electron devices [61, 5].”
Silicon quantum electronics (2012, background): “Experiments on lithographically defined quantum dots in GaAs/AlGaAs heterostructures have shown qubit initialization, single-shot single-electron spin read-out (Elzerman et al., 2004), and coherent control of single-spin (Koppens et al., 2006) and two-spin (Petta et al., 2005) states.”
An addressable quantum dot qubit with fault-tolerant control-fidelity. (2014, methodology): “We apply microwave pulses to the on-chip transmission line to create an ac magnetic field B1 which drives transitions between the spin-down and spin-up states of the quantum dot[24].”
A two-qubit logic gate in silicon (2014, background): “Early research focussed mainly on III-V semiconductor compounds such as GaAs, resulting in single spin qubits [15], singlet-triplet qubits [16] and exchange only qubits [17], which can be coupled capacitively [11] or via the exchange”
A CMOS silicon spin qubit (2016, positive): “This implies the possibility to perform electric-dipole spin resonance (EDSR), namely to drive coherent hole-spin rotations by means of microwave frequency (MW) modulation of a gate voltage (Supplementary Note 4).”
Electrically driven single-electron spin resonance in a slanting Zeeman field (2008, neutral): “However, the technique has proven very challenging when addressing individual spin”