Berlin 2015 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 64: Quantum Information Systems: Mostly Concepts (jointly with HL)
TT 64.2: Talk
Wednesday, March 18, 2015, 11:15–11:30, EW 202
Surface Acoustic Waves as a versatile tool for quantum information processing with solid-state spin qubits — •Martin J. A. Schuetz1, Eric M. Kessler2,3, J. Ignacio Cirac1, Mikhail D. Lukin2,3, Lieven M. K. Vandersypen4, and Géza Giedke1,5 — 1Max-Planck-Institut für Quantenoptik, H.-Kopfermann-Str 1, D-85748 Garching — 2ITAMP, Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138, USA — 3Physics Department, Harvard University, Cambridge, Massachusetts 02318, USA — 4Kavli Institute of NanoScience, TU Delft, P.O. Box 5046, 2600 GA Delft, The Netherlands — 5Donostia International Physics Center, Paseo Manuel de Lardizabal 4, E-20018 San Sebastian
Surface acoustic waves (SAW) offer a great variety of applications in the context of solid-state quantum information processing (QIP). The use of SAWs as transport shuttles for single electrons has been demonstrated, high-quality cavities for SAW can be fabricated, and their quantum nature has been explored coupling them to superconducting qubits.
We investigate theoretically the use of SAWs for QIP with spin qubits in GaAs quantum dots. We show that strong coupling between the qubit and SAW cavities is feasible with current cavity designs. We investigate the viability of “quantum acoustics” in this setting, where phononic cavities are used to couple spin qubits and phonons serve as propagating carriers of quantum information. Possibilities to extend these results to other spin qubits such as NV centers in diamond are discussed.