Error Analysis For Encoding A Qubit In An Oscillator

Details Error Analysis For Encoding A Qubit In An Oscillator Error Analysis For Encoding A Qubit In An Oscillator

2005-10-13

arxiv.org/abs/quant-ph/0510107v1

Physics

Quantum Physics

5 pages, 8 figures, submitted to Physical Review A

Scientific paper

10.1103/PhysRevA.73.012325

In the paper titled "Encoding A Qubit In An Oscillator" Gottesman, Kitaev, and Preskill [quant-ph/0008040] described a method to encode a qubit in the continuous Hilbert space of an oscillator's position and momentum variables. This encoding provides a natural error correction scheme that can correct errors due to small shifts of the position or momentum wave functions (i.e., use of the displacement operator). We present bounds on the size of correctable shift errors when both qubit and ancilla states may contain errors. We then use these bounds to constrain the quality of input qubit and ancilla states.

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