Quantum Computing with Spatially Delocalized Qubits

2002/09/30 by J. Mompart, K. Eckert, W. Ertmer +3 · 2 citations
Computer Science · Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Quantum Information and Cryptography #Quantum optics and atomic interactions #quant-ph

paper · pdf · doi:10.1103/physrevlett.90.147901

4 pages, 4 figures

arxiv created 2002/09/30 · openalex publication_date 2003/04/08 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/04

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 multiqubit highly entangled states can be created in this scheme.

Citations

• Single Atoms in an Optical Dipole Trap: Towards a Deterministic Source of Cold Atoms
• Resolved-Sideband Raman Cooling to the Ground State of an Optical Lattice
• Quantum-state engineering with Josephson-junction devices

Cited by

• Transport and entanglement generation in the Bose–Hubbard model
• Teleportation on a Quantum Dot Array