Figure 5 | Scientific Reports

Figure 5

From: Canonical Hamiltonian ensemble representation of dephasing dynamics and the impact of thermal fluctuations on quantum-to-classical transition

Figure 5

The proposed experimental realization is composed of two FID signals. (a) After the electron spin initialization to \(|0\rangle\) by a 532-nm green laser, the standard Ramsey pulse sequence consists of two MW \((\pi /2)_x\) pulses separated by an FID time period, during which the spin qubit pure dephasing takes place. The final laser is used to detect the remaining population in the \(|0\rangle\) state and the normalized fluorescence \({\rm I}_x(t)\) is recorded. (b) To completely reconstruct the phase information, we need to measure the signal along the other orthogonal axis. A variation of the standard Ramsey pulse sequence is adopted by replacing the second MW pulse with \((\pi /2)_y\) and the signal \({\rm I}_y(t)\) is recorded. Then the dephasing factor \(\phi (t)\) and the CHER \(\wp (\omega )\) can be determined accordingly.

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