Correcting the effects of spontaneous emission on cold trapped ions

Details Correcting the effects of spontaneous emission on cold trapped ions Correcting the effects of spontaneous emission on cold trapped ions

1996-10-21

arxiv.org/abs/quant-ph/9610031v3

Physics

Quantum Physics

19 pages; 2 figures; RevTex; The quantum codewords are extended to achieve invariance under the conditional time evolution bet

Scientific paper

10.1103/PhysRevA.56.640

We propose two quantum error correction schemes which increase the maximum storage time for qubits in a system of cold trapped ions, using a minimal number of ancillary qubits. Both schemes consider only the errors introduced by the decoherence due to spontaneous emission from the upper levels of the ions. Continuous monitoring of the ion fluorescence is used in conjunction with selective coherent feedback to eliminate these errors immediately following spontaneous emission events, and the conditional time evolution between quantum jumps is removed by symmetrizing the quantum codewords.

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