Enhanced phase estimation by implementing dynamical decoupling in a multi-pass quantum metrology protocol
Hefei National Laboratory for Physics Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China - Hefei, 230026, China
Accepted: 4 August 2011
Based on repetitive generation of the Aharonov-Anandan geometric phase, a multi-pass quantum metrology protocol is realized via the electron spin state of a single nitrogen-vacancy defect center in diamond. It is then demonstrated that high-order dynamical decoupling pulse sequences can be implemented in our metrology protocol and hence improve its performance in phase estimation.
PACS: 03.67.Ac – Quantum algorithms, protocols, and simulations / 42.50.Dv – Quantum state engineering and measurements
© EPLA, 2011