Print Email Facebook Twitter Tuned Transition from Quantum to Classical for Macroscopic Quantum States Title Tuned Transition from Quantum to Classical for Macroscopic Quantum States Author Fedorov, A. Macha, P. Feofanov, A.K. Harmans, C.J.P.M. Mooij, J.E. Faculty Applied Sciences Department QN/Quantum Nanoscience Date 2011-04-29 Abstract The boundary between the classical and quantum worlds has been intensely studied. It remains fascinating to explore how far the quantum concept can reach with use of specially fabricated elements. Here we employ a tunable flux qubit with basis states having persistent currents of 1???A carried by a million pairs of electrons. By tuning the tunnel barrier between these states we see a crossover from quantum to classical. Released from nonequilibrium, the system exhibits spontaneous coherent oscillations. For high barriers the lifetime of the states increases dramatically while the tunneling period approaches the phase coherence time and the oscillations fade away. To reference this document use: http://resolver.tudelft.nl/uuid:717f0974-082e-44a1-b048-41f2d3d64ab0 DOI https://doi.org/10.1103/PhysRevLett.106.170404 Publisher American Physical Society ISSN 0031-9007 Source http://link.aps.org/doi/10.1103/PhysRevLett.106.170404 Source Physical Review Letters, 106 (17), 2011 Part of collection Institutional Repository Document type journal article Rights (c) 2011 The Author(s)American Physical Society Files PDF Fedorov_2011.pdf 1.68 MB Close viewer /islandora/object/uuid:717f0974-082e-44a1-b048-41f2d3d64ab0/datastream/OBJ/view