Loss Tolerant Linear Optical Quantum Memory By Measurement Based Quantum Computing

Details Loss Tolerant Linear Optical Quantum Memory By Measurement Based Quantum Computing Loss Tolerant Linear Optical Quantum Memory By Measurement Based Quantum Computing

2007-05-14

arxiv.org/abs/0705.1904v1

New J. Phys. 9 203 (2007)

Physics

Quantum Physics

20 pages, 10 figures. to appear in New Journal of Physics Focus Issue on "Measurement-based quantum information processing"

Scientific paper

10.1088/1367-2630/9/6/203

We give a scheme for loss tolerantly building a linear optical quantum memory which itself is tolerant to qubit loss. We use the encoding recently introduced in [Phys. Rev. Lett. 97, 120501, (2006)] and give a method for efficiently achieving this. The entire approach resides within the "One-way" model for quantum computing. Our results suggest that it is possible to build a loss tolerant quantum memory, such that if the requirement is to keep the data stored over arbitrarily long times then this is possible with only polynomially increasing resources and logarithmically increasing individual photon life times.

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