Abstract
The coherence times achieved with continuous dynamical decoupling techniques are often limited by fluctuations in the driving amplitude. In this work, we use time-dependent phase-modulated continuous driving to increase the robustness against such fluctuations in a dense ensemble of nitrogen-vacancy centers in diamond. Considering realistic experimental errors in the system, we identify the optimal modulation strength and demonstrate an improvement of an order of magnitude in the spin preservation of arbitrary states over conventional single continuous driving. The phase-modulated driving exhibits results comparable to those found with previously examined amplitude-modulated techniques and is expected to outperform them in experimental systems having higher phase accuracy. The proposed technique could open new avenues for quantum information processing and many-body physics in systems dominated by high-frequency spin-bath noise, for which pulsed dynamical decoupling is less effective.
| Original language | American English |
|---|---|
| Article number | 013850 |
| Journal | Physical Review A |
| Volume | 96 |
| Issue number | 1 |
| DOIs | |
| State | Published - 25 Jul 2017 |
Bibliographical note
Funding Information:This work has been supported in part by the Minerva ARCHES award, the CIFAR-Azrieli global scholars program, the Israel Science Foundation (Grant No. 750/14), the Ministry of Science and Technology, Israel, and the CAMBR fellowship for Nanoscience and Nanotechnology. A.R. acknowledges the support of the Israel Science Foundation (Grant No. 1500/13), the European commission, EU Project DIADEMS and Hyperdiamond, and the Niedersachsen-Israeli Research Cooperation Program.
Publisher Copyright:
© 2017 American Physical Society.