Quantum superposition of macroscopic persistent-current states

Autor:	A.C.J. ter Haar, Seth Lloyd, J. E. Mooij, Terry P. Orlando, Frank K. Wilhelm, Caspar H. van der Wal, Raymond N. Schouten, C. J. P. M. Harmans
Přispěvatelé:	Zernike Institute for Advanced Materials
Rok vydání:	2000
Předmět:	Physics Josephson effect Flux qubit Multidisciplinary Level repulsion Condensed matter physics Quantum mechanics Degenerate energy levels Quantum superposition Macroscopic quantum phenomena Persistent current Ground state
Zdroj:	Science, 290(5492). AMER ASSOC ADVANCEMENT SCIENCE
ISSN:	0036-8075 1095-9203
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::76f7b103b71310bf2fac5998f819a334 https://pubmed.ncbi.nlm.nih.gov/11052934 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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