Experimental quantum coding against qubit loss error

Details Experimental quantum coding against qubit loss error Experimental quantum coding against qubit loss error

2008-04-14

arxiv.org/abs/0804.2268v1

Proc. Natl. Acad. Sci. USA 105, 11050-11054 (2008)

Physics

Quantum Physics

12 pages, 9 figures, revTex format. manuscript submitted

Scientific paper

10.1073/pnas.0800740105

A significant obstacle for practical quantum computation is the loss of physical qubits in quantum computers, a decoherence mechanism most notably in optical systems. Here we experimentally demonstrate, both in the quantum circuit model and in the one-way quantum computer model, the smallest non-trivial quantum codes to tackle this problem. In the experiment, we encode single-qubit input states into highly-entangled multiparticle codewords, and we test their ability to protect encoded quantum information from detected one-qubit loss error. Our results prove the in-principle feasibility of overcoming the qubit loss error by quantum codes.

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