Title :
Quantum entanglement and controlled logical gates using coupled SQUID flux qubits
Author :
Zhou, Zhongyuan ; Chu, Shih-I ; Han, Siyuan
Author_Institution :
Dept. of Chem., Univ. of Kansas, Lawrence, KS, USA
fDate :
6/1/2005 12:00:00 AM
Abstract :
We present an approach to realize universal two-bit quantum gates using two SQUID flux qubits. In this approach the basic unit consists of two inductively coupled SQUIDs with realistic device parameters. Quantum logical gates are implemented by applying resonant microwave pulse to the qubits. This procedure is demonstrated by realizing a controlled-NOT (CNOT) gate and the maximally entangled states of the coupled qubits through highly accurate numerical solution of the time-dependent Schrodinger equation of the system. This coupling scheme is simple and can be readily extended to many-qubit circuits required for scalable quantum information processing.
Keywords :
SQUIDs; Schrodinger equation; quantum entanglement; quantum gates; superconducting logic circuits; controlled logical gates; controlled-NOT gate; coupled SQUID flux qubits; coupled qubits; inductively coupled SQUIDs; quantum entanglement; quantum logical gates; resonant microwave pulse; time-dependent Schrodinger equation; universal two-bit quantum gates; Control systems; Coupling circuits; Josephson junctions; Quantum computing; Quantum entanglement; Resonance; SQUIDs; Schrodinger equation; Superconducting device noise; Superconducting microwave devices; Coupled SQUID flux qubits; quantum computing; quantum entanglement; two-bit gates;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2005.850074