News Column

Studies from Spanish National Research Council (CSIC) Yield New Data on Physics (Long-range spin transfer in triple quantum dots)

August 5, 2014

By a News Reporter-Staff News Editor at Physics Week -- Fresh data on Physics are presented in a new report. According to news reporting originating in Madrid, Spain, by VerticalNews journalists, research stated, "Tunneling in a quantum coherent structure is not restricted to only nearest neighbors. Hopping between distant sites is possible via the virtual occupation of otherwise avoided intermediate states."

The news reporters obtained a quote from the research from Spanish National Research Council (CSIC), "Here we report the observation of long-range transitions in the transport through three quantum dots coupled in series. A single electron is delocalized between the left and right quantum dots, while the center one remains always empty. Superpositions are formed, and both charge and spin are exchanged between the outermost dots. The delocalized electron acts as a quantum bus transferring the spin state from one end to the other. Spin selection is enabled by spin correlations."

According to the news reporters, the research concluded: "The process is detected via the observation of narrow resonances which are insensitive to Pauli spin blockade."

For more information on this research see: Long-range spin transfer in triple quantum dots. Physical Review Letters, 2014;112(17):176803. (American Physical Society -; Physical Review Letters -

Our news correspondents report that additional information may be obtained by contacting R. Sanchez, Instituto de Ciencia de Materiales de Madrid, CSIC, Cantoblanco, 28049 Madrid, Spain. Additional authors for this research include G. Granger, L. Gaudreau, A. Kam, M. Pioro-Ladriere, S.A. Studenikin, P. Zawadzki, A.S. Sachrajda and G. Platero.

Keywords for this news article include: Spain, Madrid, Europe, Quantum Dots, Quantum Physics.

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC

For more stories covering the world of technology, please see HispanicBusiness' Tech Channel

Source: Physics Week

Story Tools Facebook Linkedin Twitter RSS Feed Email Alerts & Newsletters