Quantum Computing in the Presence of Detected Spontaneous Emission

Details Quantum Computing in the Presence of Detected Spontaneous Emission Quantum Computing in the Presence of Detected Spontaneous Emission

2003-01-20

arxiv.org/abs/quant-ph/0301105v4

Phys. Rev. A 68, 022322 (2003)

Physics

Quantum Physics

7 pages, no figures. This version corrects an error in the description of spontaneous emission in the quantum jumps picture. A

Scientific paper

10.1103/PhysRevA.68.022322

A new method for quantum computation in the presence of detected spontaneous emission is proposed. The method combines strong and fast (dynamical decoupling) pulses and a quantum error correcting code that encodes $n$ logical qubits into only $n+1$ physical qubits. Universal fault-tolerant quantum computation is shown to be possible in this scheme using Hamiltonians relevant to a range of promising proposals for the physical implementation of quantum computers.

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