2012年8月24日 · The oldest and simplest pulse sequence for dynamical decoupling is the CPMG sequence —a train of equidistant π-pulses around the same axis. In fig. 2, we compare the signal decays for different CPMG sequences, starting with the Hahn echo at the bottom and experiments with increasing numbers of refocusing pulses towards the top. In each curve ...

2015年8月24日 · In this work, we perform a theoretical and experimental analysis of the performance of several DD protocols, including standard CPMG and XY-based pulse sequences as well as modifications thereon, and ex-tract an optimized protocol for preserving a general NV ensemble state at 77 K.

2023年12月14日 · Dynamical decoupling (DD) is perhaps the simplest and least resource-intensive error-suppression strategy for improving quantum computer performance.

2017年9月25日 · In the experiment, CPMG was used to study the noise environment and KDD xy for storage. Here we show that the filter function of KDD xy is the same as that of CPMG.

2015年1月7日 · Therefore, a CPMG (Carr–Purcell–Meiboom–Gill) pulse sequence (RF 3 in Fig. 2) was used as a simple and effective method to measure the decoherence rate for 100 ms < τ < 10,000 ms.

2021年4月22日 · CPMG and KDD x can reach a 1/e spin coherence lifetime of 2.68 ± 0.06 and 0.95 ± 0.03 h when τ = 20 ms, respectively. For storage of light, we measure the decay of the echo with various ...

2011年11月30日 · Experimental relaxation times of the probe spin under the application of CPMG (squares) and KDD (circles) sequences. The black solid line represents a power law fitted to the CPMG data and the green dotted line the asymptotic free evolution decay rate.

2024年3月6日 · We found that the recently introduced DD sequence KDD is remarkably robust and works for arbitrary initial conditions. It is much less susceptible to experimental uncertainties, such as flip-angle errors and frequency offsets, than the simpler sequences CPMG and XY-4.

Dynamical decoupling (DD) is a well-known technique to pro-tect idle qubits from decoherence error. However, the optimal approach to inserting DD sequences still remains unclear. In this paper, we identify different conditions that lead to idle qubits and evaluate strategies for DD insertion under these specific conditions.

ough optimized dynamical decoupling (DD). Cooling the sample down to 77 K suppresses longitudinal spin relaxation T1 effects and DD microwave pulses are used to increase the transverse coherenc. time T2 from ∼ 0.7 ms up to ∼ 30 ms. We extend previous work of single-axis (CPMG) DD towards .