Robust Quantum Computation with Quantum Dots

Details Robust Quantum Computation with Quantum Dots Robust Quantum Computation with Quantum Dots

2003-04-23

arxiv.org/abs/quant-ph/0304150v1

Physics

Quantum Physics

4 pages, 5 figures, submitted to PRL

Scientific paper

Quantum computation in solid state quantum dots faces two significant challenges: Decoherence from interactions with the environment and the difficulty of generating local magnetic fields for the single qubit rotations. This paper presents a design of composite qubits to overcome both challenges. Each qubit is encoded in the degenerate ground-state of four (or six) electrons in a system of five quantum dots arranged in a two-dimensional pattern. This decoherence-free subspace is immune to both collective and local decoherence, and resists other forms of decoherence, which must raise the energy. The gate operations for universal computation are simple and physically intuitive, and are controlled by modifying the tunneling barriers between the dots--Control of local magnetic fields is not required. A controlled-phase gate can be implemented in a single pulse.

Affiliated with

Also associated with

No associations

Rating

Robust Quantum Computation with Quantum Dots 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 Robust Quantum Computation with Quantum Dots, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Robust Quantum Computation with Quantum Dots will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-108536