Quantum computation with optical coherent states

T. C. Ralph*, A. Gilchrist, G. J. Milburn, W. J. Munro, S. Glancy

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

486 Citations (Scopus)


A quantum computation scheme based on encoding qubits as coherent states of equal absolute amplitude but opposite sign is presented. The optical networks required to manipulate the qubits are conceptually simple and require only linear interactions and photon counting, provided coherent superpositioin ancilla states are available. It is shown that qubits with amplitude |α|=2 and resource cat states of amplitude |α|=√6 would be sufficient.

Original languageEnglish
Article number042319
Pages (from-to)1-11
Number of pages11
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number4 A
Publication statusPublished - Oct 2003
Externally publishedYes


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