Physical optimization of quantum error correction circuits

Burkard, G. and Loss, D. and DiVincenzo, D. P. and Smolin, J. A.. (1999) Physical optimization of quantum error correction circuits. Physical Review B, Vol. 60, H. 16. pp. 11404-11416.

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Official URL: http://edoc.unibas.ch/dok/A5254752

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Quantum error-correcting codes have been developed to protect a quantum computer from decoherence due to a noisy environment. In this paper, we present two methods for optimizing the physical implementation of such error correction schemes. First, we discuss an optimal quantum circuit implementation of the smallest error-correcting code (the three bit code). Quantum circuits are physically implemented by serial pulses, i.e., by switching on and off external parameters in the Hamiltonian one after another. In contrast to this we introduce a parallel switching method which allows faster gate operation by switching all external parameters simultaneously, and which has potential applications for arbitrary quantum computer architectures. We apply both serial and parallel switching to electron spins in coupled quantum dots subject to a Heisenberg coupling H = J(t)S-1.S-2. We provide a list of steps that can be implemented experimentally and used as a test for the functionality of quantum error correction.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Theoretische Physik Mesoscopics (Loss)
UniBasel Contributors:Loss, Daniel
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Institute of Physics
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:22 Mar 2012 14:25
Deposited On:22 Mar 2012 13:48

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