Session A17: Focus Session: Photons and Quantum Dots

8:00 AM–10:48 AM, Monday, March 16, 2009
Room: 318

Sponsoring Unit: GQI
Chair: Thaddeus Ladd, Stanford University

Abstract ID: BAPS.2009.MAR.A17.3

Abstract: A17.00003 : A photonic cluster state machine gun

8:48 AM–9:00 AM

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  Terry Rudolph
    (Imperial College London)

  Netanel Lindner
    (Technion Institute)

  Sophia Economou
    (Naval Research Lab)

A method is developed 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. Such sources greatly alleviate the resources required to achieve linear optical quantum computation. 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. Using realistic parameters for current quantum dot sources, we conclude high entangled-photon emission rates are achievable, with Pauli-error rates less than 0.2{\%}. For quantum dot sources the method has the added advantage of circumventing the problematic issue of obtaining identical photons from independent, non-identical quantum dots. By using recently controlled-phase gates between two spins in neighboring quantum dots, a two-dimensional cluster can be generated.

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