Electric g Tensor Control and Spin Echo of a Hole-Spin Qubit in a Quantum Dot Molecule

Details Electric g Tensor Control and Spin Echo of a Hole-Spin Qubit in a Quantum Dot Molecule Electric g Tensor Control and Spin Echo of a Hole-Spin Qubit in a Quantum Dot Molecule

2010-03-03

arxiv.org/abs/1003.0897v1

New J. Phys. 12, 093012 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

11 pages, 6 figures, revtex4

Scientific paper

The feasibility of high-fidelity single-qubit operations of a hole spin in a quantum dot molecule by electric g tensor control is demonstrated. Apart from a constant external magnetic field the proposed scheme allows for an exclusively electric control of the hole spin. Realistic electric gate bias profiles are identified for various qubit operations using process-tomography-based optimal control. They are shown to be remarkably robust against decoherence and dissipation arising from the interaction of the hole with host-lattice nuclear spins and phonons, with a fidelity loss of $\approx$ 1 percent for gate operation times of $\approx 10$ ns. Spin-echo experiments for the hole spin are modeled to explore dephasing mechanisms and the role of pulse-timing imperfections on the gate fidelity loss is discussed.

Affiliated with

Also associated with

No associations

Rating

Electric g Tensor Control and Spin Echo of a Hole-Spin Qubit in a Quantum Dot Molecule does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Electric g Tensor Control and Spin Echo of a Hole-Spin Qubit in a Quantum Dot Molecule, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electric g Tensor Control and Spin Echo of a Hole-Spin Qubit in a Quantum Dot Molecule will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-558789