ISSN:
1432-0622
Keywords:
Key words: Quantum bit, Josephson junction, Single-electron transistor, Quantum measurement.
Source:
Springer Online Journal Archives 1860-2000
Topics:
Computer Science
,
Mathematics
,
Technology
Notes:
Abstract. Among the physical realizations of the elements required for quantum computation nano-scale electronic devices [2, 10, 12, 16] 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.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s002000050136
Permalink
