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Quantum computing with spatially delocalized qubits

J. Mompart·K. Eckert·W. Ertmer·G. Birkl·M. Lewenstein
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Abstract

We analyze the operation of quantum gates for neutral atoms with qubits that are delocalized in space, i.e., the computational basis states are defined by the presence of a neutral atom in the ground state of one out of two trapping potentials. The implementation of single qubit gates as well as a controlled phase gate between two qubits is discussed and explicit calculations are presented for rubidium atoms in optical microtraps. Furthermore, we show how multi-qubit highly entangled states can be created in this scheme.

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J. Mompart, K. Eckert, W. Ertmer, G. Birkl, M. Lewenstein. 2002-09-30. Quantum computing with spatially delocalized qubits. https://doi.org/10.1103/physrevlett.90.147901

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