Automated Error Correction For Generalized Bell States

Details Automated Error Correction For Generalized Bell States Automated Error Correction For Generalized Bell States

2010-08-12

arxiv.org/abs/1008.2129v2

Physics

Quantum Physics

10 pages, 1 figure

Scientific paper

A procedure is developed to automatically correct the bit flip and the arbitrary phase change errors in Generalized Bell states (GBS). The phase and parity characteristics of the GBS are encoded in ancilla bits without altering the state under consideration. The same information is then used to correct the state at a different point, through appropriate unitrary control operations. It is also shown that the distributed/indirect measurements on ancilla can yield the error syndrome. The restricted error correction circuit obtained for N-qubit entangled states of the Bell type, are generalized for the corresponding higher dimensions, thus opening up the possibility of designing of task specific error correction circuits.

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