Title: Quantum Information Processing: Spingineering the Future
Speaker:
Dr. Andrew Landahl, Research Assistant Professor Department of Physics and Astronomy, University of New Mexico
Date/Time:
Tuesday, November 11, 2008, from 1:30 – 2:30 pm
Location: International Programs Building, Conference Room 1154 (Sandia NM)
Brief Abstract: The spin of a quantum particle is a natural candidate for storing quantum information. A number of technologies are based on this idea, including quantum dots, optical lattices, and nuclear magnetic resonance. Devising new protocols for acquiring, processing, and transmitting information in these systems is a "spingineering" task that current and future generations of information technology researchers will face.
I will present my work on three specific "spingineering" research problems, one each from the areas of communication, computation, and error correction. To prepare the uninitiated, I will also include a mini "quantum information 101" segment. After this, I will show how to engineer a spin network to serve as a "quantum communication bus" that, in the absence of noise, allows arbitrary-distance perfect-fidelity quantum communication. Then I will show how to engineer a spin chain to serve as a "programmable universal quantum computer" that can execute an arbitrary program on an arbitrary input, where both the program and the data are encoded in the initial state of the spins. Finally, I will show how to perform "continuous-time quantum error correction" on a spin network by optimizing a feedback loop that uses weak measurements and Hamiltonian controls.
These problems demonstrate that "spingineering" requires a broad-based theoretical background to achieve an engineering solution; in this talk the solutions will rely on quantum mechanics, algebraic coding theory, random walk theory, and feedback control theory.
CSRI POC:
Mark D. Rintoul, (505) 844-9592 |