Unified approach for universal quantum gates in a coupled superconducting two-qubit system with fixed always-on coupling
Journal
Physical Review B - Condensed Matter and Materials Physics
Journal Volume
73
Journal Issue
10
Date Issued
2006
Author(s)
Abstract
We demonstrate that in a coupled two-qubit system any single-qubit gate can be decomposed into 0-controlled and 1-controlled two-qubit gates which can be implemented by manipulations analogous to that used for a controlled NOT (CNOT) gate. Based on this we present a unified approach to implement universal single-qubit and two-qubit gates in a coupled two-qubit system with fixed always-on coupling. This approach requires neither supplementary circuit or additional physical qubits to control the coupling nor extra hardware to adjust the energy level structure. The feasibility of this approach is demonstrated by numerical simulation of single-qubit gates and creation of two-qubit Bell states in rf-driven inductively coupled two superconducting quantum interference device flux qubits with realistic device parameters and constant always-on coupling. © 2006 The American Physical Society.
SDGs
Type
journal article