Quantum computing and communication with decoherence-free atomic states

Details Quantum computing and communication with decoherence-free atomic states Quantum computing and communication with decoherence-free atomic states

2001-11-07

arxiv.org/abs/quant-ph/0111041v1

Physics

Quantum Physics

11 pages, No Figures

Scientific paper

To resist decoherence from destroying the phase factor of qubit state, it is important to use decoherence-free states for processing, transmitting and storing quantum information in quantum computing and quantum communication. We propose a practical scheme using four atoms with decoherence-free states in a single-mode cavity to realize the entanglement and fundamental quantum logic gates. The transmission of quantum information can be made directly from one atom to another, in which the cavity is only virtually excited. The possible application and the experimental requirement of our proposal are discussed

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