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Automatic generation of nonadiabatic conditional geometric phase shift with a noncoplanar fibre system
KTH, School of Information and Communication Technology (ICT), Centres, Zhejiang-KTH Joint Research Center of Photonics, JORCEP.
2006 (English)In: Physica Scripta, ISSN 0031-8949, E-ISSN 1402-4896, Vol. 73, no 1, p. 79-83Article in journal (Refereed) Published
Abstract [en]

A new scheme for realizing a nonadiabatic conditional geometric phase shift via a noncoplanar (coiled) fibre system is presented. It is shown that the effective Hamiltonian that describes the interaction of polarized photons with a fibre medium is just the Wang-Matsumoto type of Hamiltonian. This, therefore, means that the coiled fibre system may be an ideal implementation for realizing the nonadiabatic geometric phase gates involved in the topological quantum computation. A remarkable feature of the present method is that it can automatically meet the conditions and requirements proposed in the Wang-Matsumoto nuclear magnetic resonance (NMR) scheme: specifically, (i) in the coiled fibre system, the dynamical phase of photon wavefunction caused by the interaction Hamiltonian automatically vanishes; (ii) the Wang-Matsumoto requirement for the parameters in the Wang-Matsumoto NMR Hamiltonian can be exactly satisfied automatically in such a fibre system; and (iii) the conditional initial state can be easily achieved by manipulating the initial wave vector of polarized photons.

Place, publisher, year, edition, pages
2006. Vol. 73, no 1, p. 79-83
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-37617DOI: 10.1088/0031-8949/73/1/011ISI: 000236387700011Scopus ID: 2-s2.0-33745497200OAI: oai:DiVA.org:kth-37617DiVA, id: diva2:434498
Available from: 2011-08-15 Created: 2011-08-15 Last updated: 2017-12-08Bibliographically approved

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