caa a22 4500 445382317 CHVBK 20180317143021.0 cr unu---uuuuu 170323e20110101xx s 000 0 eng 10.1007/s10948-010-0858-x doi (NATIONALLICENCE)springer-10.1007/s10948-010-0858-x Experiments on a Superconducting Qubit Manipulated by Fast Flux Pulses: The Issue of Non-adiabaticity [Elektronische Daten] [M. Castellano, F. Chiarello, G. Torrioli] The double SQUID qubit is a superconducting interferometer (SQUID) made of two Josephson junctions and two superconducting loops. Its energy potential can be greatly modified in shape and symmetry by using two magnetic control fluxes that can change the potential from a double well to an almost harmonic single well: This feature is exploited for manipulating the qubit without resorting to the usual NMR-like techniques with microwave irradiation. The qubit machinery relies on these operations being performed non-adiabatically, realizing a transition between the two lowest-lying energy levels, at the same time avoiding excitation of upper levels, a condition that can be satisfied by using control pulses with proper risetime. We show experimental results referring to manipulation of the qubit at different rates and make a qualitative comparison with theoretical expectations. Springer Science+Business Media, LLC, 2010 Superconducting quantum bits nationallicence Superconducting QUantum interference Device (SQUID) nationallicence Decoherence nationallicence Castellano M. Istituto di Fotonica e Nanotecnologie—CNR, via CIneto Romano 42, 00156, Rome, Italy aut Chiarello F. Istituto di Fotonica e Nanotecnologie—CNR, via CIneto Romano 42, 00156, Rome, Italy aut Torrioli G. Istituto di Fotonica e Nanotecnologie—CNR, via CIneto Romano 42, 00156, Rome, Italy aut Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/1-2(2011-01-01), 1053-1058 1557-1939 24:1-2<1053 2011 24 10948 https://doi.org/10.1007/s10948-010-0858-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10948-010-0858-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Castellano M. Istituto di Fotonica e Nanotecnologie—CNR, via CIneto Romano 42, 00156, Rome, Italy aut NATIONALLICENCE 700 1- Chiarello F. Istituto di Fotonica e Nanotecnologie—CNR, via CIneto Romano 42, 00156, Rome, Italy aut NATIONALLICENCE 700 1- Torrioli G. Istituto di Fotonica e Nanotecnologie—CNR, via CIneto Romano 42, 00156, Rome, Italy aut NATIONALLICENCE 773 0- Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/1-2(2011-01-01), 1053-1058 1557-1939 24:1-2<1053 2011 24 10948 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer