Monday, July 29, 2013

1307.7073 (Vahid Azimi Mousolou et al.)

Non-Abelian off-diagonal geometric phases in nano-engineered four-qubit

Vahid Azimi Mousolou, Carlo M. Canali, Erik Sjöqvist
The concept of off-diagonal geometric phase (GP) has been introduced in order to recover interference information about the geometry of quantal evolution where the standard GPs are not well-defined. In this Letter, we propose a physical setting for realizing non-Abelian off-diagonal GPs. The proposed non-Abelian off-diagonal GPs can be implemented in a cyclic chain of four qubits with controllable nearest-neighbor interactions. Our proposal seems to be within reach in various nano-engineered systems and therefore opens up for first experimental test of the non-Abelian off-diagonal GP.
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