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Title: Symmetric construction of reference-frame-free qudits
Authors: Suzuki, J.
Tabia, G.N.M.
Englert, B.-G. 
Issue Date: 17-Nov-2008
Citation: Suzuki, J., Tabia, G.N.M., Englert, B.-G. (2008-11-17). Symmetric construction of reference-frame-free qudits. Physical Review A - Atomic, Molecular, and Optical Physics 78 (5) : -. ScholarBank@NUS Repository.
Abstract: By exploiting a symmetric scheme for coupling N spin- 1/2 constituents (the physical qubits) to states with total angular momentum N/2-1, we construct rotationally invariant logical qudits of dimension d=N-1. One can encode all qudit states, and realize all qudit measurements, by this construction. The rotational invariance of all relevant objects enables one to transmit quantum information without having aligned reference frames between the parties that exchange the qudits. We illustrate the method by explicit constructions of reference-frame-free qubits and qutrits and, for the qubit case, comment on possible experimental implementations. © 2008 The American Physical Society.
Source Title: Physical Review A - Atomic, Molecular, and Optical Physics
ISSN: 10502947
DOI: 10.1103/PhysRevA.78.052328
Appears in Collections:Staff Publications

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