Berlin 2001 – wissenschaftliches Programm
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Q: Quantenoptik
Q 9: Poster: Quantum Information
Q 9.22: Poster
Dienstag, 3. April 2001, 12:30–15:00, AT2
Fock state preparation of the electromagnetic field using two-atom entanglement — •Thomas Wellens1, Burkhard Kümmerer2, and Andreas Buchleitner1 — 1MPI für Physik komplexer Systeme, Nöthnitzer Str. 38, 01187 Dresden — 2Mathematisches Institut A, Pfaffenwaldring 57, 70569 Stuttgart
If a single mode of the quantized electromagnetic field interacts with a sequence of N two-level atoms, the asymptotic completeness of the atoms-field interaction enables us to prepare any desired field state |χ⟩ with arbitrarily high fidelity [1]. The initial atomic state required for this purpose in general exhibits entanglement between all N atoms. In order to prepare Fock states |n⟩, however, we will show that a sequence of pairs of subsequent atoms with the appropriate two-particle entanglement is sufficient, which simplifies the experimental realization of our scheme. We discuss how the fidelity of the target state |n⟩ depends on the length N of the atomic sequence and the fidelity of the initial atomic state.
[1] T. Wellens, A. Buchleitner, B. Kümmerer, and H. Maassen, PRL 85, 3361 (2000).