title: Fault-tolerant linear optical quantum computing with small-amplitude coherent States.
abstract: Quantum computing using two coherent states as a qubit basis is a proposed alternative architecture with lower overheads but has been questioned as a practical way of performing quantum computing due to the fragility of diagonal states with large coherent amplitudes. We show that using error correction only small amplitudes (alpha>1.2) are required for fault-tolerant quantum computing. We study fault tolerance under the effects of small amplitudes and loss using a Monte Carlo simulation. The first encoding level resources are orders of magnitude lower than the best single photon scheme.
authors.affiliation: Centre for Quantum Computer Technology, Department of Physics, University of Queensland, St. Lucia, QLD 4072, Australia. lund@physics.uq.edu.au
authors.forename: A P
authors.initials: AP
authors.lastname: Lund
authors.forename: T C
authors.initials: TC
authors.lastname: Ralph
authors.forename: H L
authors.initials: HL
authors.lastname: Haselgrove