Coherent control of artificial molecules using an Aharonov-Bohm magnetic flux

Details Coherent control of artificial molecules using an Aharonov-Bohm magnetic flux Coherent control of artificial molecules using an Aharonov-Bohm magnetic flux

2012-04-26

arxiv.org/abs/1204.5931v1

Physics

Quantum Physics

5 pages, 4 figures

Scientific paper

Bonding and anti-bonding states of artificial molecules have been realized in experiments by directly coupling two quantum dots. Without a direct coupling between two nearby quantum dots, here we show that a continuous crossover, from symmetric to anti-symmetric molecular state, can be achieved by changing the flux through a double quantum dot Aharonov-Bohm (AB) interferometer. We explicitly present the flux-dependent real-time processes of molecular-state formation. In contrast to the transport current, which has a $2\pi$ period, the quantum state of the DQD molecule has a $4\pi$ period in the AB flux.

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