title: Loss tolerance in one-way quantum computation via counterfactual error correction.
abstract: We introduce a scheme for fault tolerantly dealing with losses (or other "leakage" errors) in cluster state computation that can tolerate up to 50% qubit loss. This is achieved passively using an adaptive strategy of measurement--no coherent measurements or coherent correction is required. Since the scheme relies on inferring information about what would have been the outcome of a measurement had one been able to carry it out, we call this counterfactual error correction.
authors.affiliation: QOLS, Blackett Laboratory, Imperial College London, Prince Consort Road, London SW7 2BW, United Kingdom.
authors.forename: Michael
authors.initials: M
authors.lastname: Varnava
authors.forename: Daniel E
authors.initials: DE
authors.lastname: Browne
authors.forename: Terry
authors.initials: T
authors.lastname: Rudolph