Transmitting the quantum state of electrons across a metallic island with Coulomb interaction

• DOI: 10.1126/science.aaw7856
• Publication Date: 2019-12-06T00:15:30Z
• Authors: H. Duprez; E. Sivre; A. Anthore; A. Aassime; A. Cavanna; U. Gennser; F. Pierre
• Keywords: Quantum Physics; Condensed Matter - Mesoscale and Nanoscale Physics; Strongly Correlated Electrons (cond-mat.str-el); FOS: Physical sciences; 7. Clean energy; 01 natural sciences; [PHYS.COND.CM-MSQHE] Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall]; Condensed Matter - Strongly Correlated Electrons; Mesoscale and Nanoscale Physics (cond-mat.mes-hall); 0103 physical sciences; Quantum Physics (quant-ph); [PHYS.COND.CM-MSQHE]Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall]

Transmitting quantum states

The coherence of electrons in mesoscopic structures is thought to be unlikely to survive in a disordered environment. Duprez et al. show that this is not necessarily the case. They studied a metallic island as an example of a disordered environment. They made an electron interferometer and incorporated the island in one of the two paths through the interferometer. At sufficiently low temperatures and in the quantum Hall regime, they observed a clear interference pattern, indicating successful transmission of the electrons' quantum state across the island.

Science , this issue p. 1243