Hannover 2003 – wissenschaftliches Programm

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Q: Quantenoptik

Q 13: Quantencomputer

Q 13.2: Vortrag

Montag, 24. März 2003, 16:45–17:00, F102

Quantum information processing with spatially delocalized qubits — •Kai Eckert¹, Jordi Mompart^1,2, Wolfgang Ertmer³, Gerhard Birkl³, and Maciej Lewenstein¹ — ¹Institut für theoretische Physik, Universität Hannover, Appelstrasse 2, 30167 Hannover, Germany — ²Departament de Física, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain — ³Institut für Quantenoptik, Universität Hannover, Welfengarten 1, 30167 Hannover, Germany

We analyse quantum computation with neutral atoms in optical microtraps [1] and propose the implementation of a qubit which is delocalized in space, i.e., each qubit consists of two separated trapping potentials and a single neutral atom. The computational basis states are defined through the presence of the atom in the ground state of one out of the two traps. Within this scheme we discuss the implementation of single qubit gates and of a controlled phase gate between two qubits.

[1] R. Dumke, M. Volk, T. Muether, F.B.J. Buchkremer, G. Birkl, and W. Ertmer, Phys. Rev. Lett. 89, 097903 (2002).