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A photonic cluster state machine gun

Netanel Lindner, Caltech - Institute of Quantum Information

(Session 10 : Saturday from 4:00-4:30)

Abstract. We present a method to convert certain single photon sources into devices capable of emitting large strings of photonic cluster state in a controlled and pulsed ‘‘on-demand’’ manner. Standard spin errors, such as dephasing, are shown to affect only 1 or 2 of the emitted photons at a time. This allows for the use of standard fault tolerance techniques, and shows that the photonic machine gun can be fired for arbitrarily long times. Using realistic parameters for current quantum dot sources, we conclude high entangled photon emission rates are achievable, with Pauli-error rates per photon of less than 0.2%. For quantum dot sources, the method has the added advantage of alleviating the problematic issues of obtaining identical photons from independent, nonidentical quantum dots, and of exciton dephasing.