Fig. 3
From: High-performance Raman quantum memory with optimal control in room temperature atoms
Fidelity of the Raman memory. a Quadrature amplitudes of the input and output signal pulses at an average of 7.9 photons/pulse. Insets are the probability distributions of the Ein and ER quadrature values at the indicated phase. The density matrices of the input and output signal pulses at 4.2 (b) and 0.76 (c) photons/pulse on average. d Fidelity as a function of the number of photons contained in the input signal pulse. The red squares show the experimental data, and the black line shows the theoretical result. The error bars correspond to one standard deviation caused by the measurement noise
