Quantum Superposition of Macroscopic Persistent-Current States

Caspar H. van der Wal, A.C.J. ter Haar, F.K. Wilhelm, R.N. Schouten, C.J.P.M. Harmans, T.P. Orlando, Seth Lloyd, J.E. Mooij

OnderzoeksoutputAcademic

896 Citaten (Scopus)
1374 Downloads (Pure)

Samenvatting

Microwave spectroscopy experiments have been performed on two quantum levels of a macroscopic superconducting loop with three Josephson junctions. Level repulsion of the ground state and first excited state is found where two classical persistent-current states with opposite polarity are degenerate, indicating symmetric and antisymmetric quantum superpositions of macroscopic states. The two classical states have persistent currents of 0.5 microampere and correspond to the center-of-mass motion of millions of Cooper pairs.
Originele taal-2English
Aantal pagina's5
TijdschriftScience
Volume290
Nummer van het tijdschrift5492
DOI's
StatusPublished - 2000

Vingerafdruk

Duik in de onderzoeksthema's van 'Quantum Superposition of Macroscopic Persistent-Current States'. Samen vormen ze een unieke vingerafdruk.

Citeer dit