Quantum Information in Semiconductors: Noiseless Encoding in a Quantum-Dot Array

Details Quantum Information in Semiconductors: Noiseless Encoding in a Quantum-Dot Array Quantum Information in Semiconductors: Noiseless Encoding in a Quantum-Dot Array

1998-04-06

arxiv.org/abs/quant-ph/9804016v2

Phys.Rev.Lett. 81 (1998) 4572-4575

Physics

Quantum Physics

5 pages LaTeX, 3 encapsulated postscript figures. Final version accepted by PRL

Scientific paper

10.1103/PhysRevLett.81.4752

A potential implementation of quantum-computation schemes in semiconductor-based structures is proposed. In particular, an array of quantum dots is shown to be an ideal quantum register for a noiseless information encoding. In addition to the suppression of phase-breaking processes in quantum dots due to the well-known phonon bottleneck, we show that a proper quantum encoding allows to realise a decoherence-free evolution on a time-scale long compared to the femtosecond scale of modern ultrafast laser technology. This result might open the way to the realization of semiconductor-based quantum processors.

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