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Figure 3 | EPJ Quantum Technology

Figure 3

From: Characterization of how dissipation and dephasing errors accumulate in quantum computers

Figure 3

Simulation and characterization of the C-NOT gate: (a) The red (lower) and blue (upper) laser fields drive , via , into the Rydberg state by two-photon absorption. (b) Implementation of the C-NOT gate involves a sequence of two-photon π-pulses: In pulse 1 the control atom makes the transition to . The target atom then makes the transitions (pulse 2), (pulse 3) and finally (pulse 4). In pulses 2-4 the target atom’s states and are swapped, but only if the control atom is not in . Finally, in pulse 5 the control atom is driven from back to . (c) Trace distance (see text in Section 4.1) between the ideal C-NOT process matrix and the process matrix calculated for the implementation shown in panel (b), with the parameters listed in Table 1. The trace distance is shown as a function of the blue laser Rabi frequency .

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