Fig. 4: Quantum control of NV centers in a levitated nanodiamond in high vacuum with a rotation frequency of 100 kHz.
From: Quantum control and Berry phase of electron spins in rotating levitated diamonds in high vacuum
a Schematic of the Rabi oscillation measurement at different rotation phase ϕ(t). The angle \({\theta }^{{\prime} }\) between the magnetic component of microwave and the z-axis is 8. 5°. b Pulse sequence of the Rabi oscillation measurement. c ODMR of the levitated nanodiamond. d Measured Rabi oscillations of NV centers at three different orientations. The Rabi frequencies are 7.10 MHz, 6.57 MHz, and 2.80 MHz at the ODMR frequencies of 2.935 GHz, 3.009 GHz, and 3.129 GHz, respectively. The red and purple curves are shifted 2% and 4% to separate the curves. e Rabi oscillation of NV centers with θ = 22° corresponding to the resonance frequency of 3.129 GHz (dip 3). The blue circles and black squares are measured at rotation phase of ϕ = π/2 and ϕ = π, respectively. The black curve is shifted 2%. f Rabi frequency at θ = 22° (blue circles) as a function of the rotation phase ϕ. The red curve is the theoretical prediction. The error bars represent standard deviations among three measurements.
