Josephson junction based quantum computing

2019-11-09 02:00:12

electronic quantum junction Josephson qubits

责任者: Makhlin, Y.;Schon, G.;Shnirman, A. 单位: Inst. fur Theor. Festkorperphysik, Karlsruhe Univ., Germany 来源出处: Applicable Algebra in Engineering, Communication and Computing(Appl. Algebra Eng. Commun. Comput. (Germany)),2000//,10(4-5):375-82 摘要: Among the physical realizations of the elements required for quantum computation nano-scale electronic devices are very promising. They can be easily integrated into electronic circuits and scaled up to large numbers of qubits. Here we describe qubits based on low-capacitance Josephson junctions. In these systems Coulomb blockade effects allow the control of the charge on a superconducting island. They constitute quantum bits, with logical states differing by the charge on one island. Single- and two-bit operations can be performed by manipulating applied gate voltages. The phase coherence time is sufficiently long to allow a series of these steps. In addition to the manipulation of qubits, the resulting quantum state can be read out by coupling a single-electron transistor capacitively to the qubit 关键词: quantum gates;superconducting junction devices;quantum computing;nano-scale electronic devices;qubits;Josephson junctions;Coulomb blockade effects;quantum bits;Josephson junction;single-electron transistor