We show that two multilevel atoms can perform quantum communication with each other via interaction with an enclosing cavity containing no photons. The physical mechanism is analogous to the way populations can be exchanged between the extremal states in a three level system via adiabatic following, without populating the intermediate states. The combined system of the two atoms, the cavity, and two laser beams contains a dark state corresponding to the cavity in its ground state. Using a counter-intuitive pulse sequence, quantum information can be transferred adiabatically from one atom to the other via this cavity dark state. This process can be used to circumvent the effect of cavity decay in a quantum computer formed by cavity interconnected qubits.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering