Preparation of Fock states and quantum entanglement via stimulated Raman adiabatic passage using a four-level atom |
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Authors: | S-Q Gong R Unanyan K Bergmann |
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Institution: | Fachbereich Physik der Universit?t, 67653 Kaiserslautern, Germany, DE
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Abstract: | We study the behaviour of an atom-cavity system exposed to a stimulated Raman adiabatic passage (STIRAP) process in a four-level
system, with a coupling scheme which generate two degenerate dark states. We find that the non-adiabatic interaction of the
two dark states guarantees that the cavity Fock states can always be generated by both intuitively and counterintuitively
ordered pulses. Furthermore, we propose a method to entangle two atoms. Depending on the ordering of the pulses two orthogonal
entangled states can be prepared. Since these entangled states do not have component of the excited states included, the technique
is robust against the detrimental consequences of spontaneous emission.
Received 20 March 2001 |
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Keywords: | PACS 42 50 Dv Nonclassical field states squeezed antibunched and sub-Poissonian states operational definitions of the phase of the field phase measurements – 03 65 Ta Foundations of quantum mechanics measurement theory |
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