The researchers investigate the role of continuous measurement and postselection in the dynamics and entanglement of a transmon-cavity-transmon coupled system, demonstrating that postselection significantly slows down the decay of entanglement compared to the unmonitored case. In the dispersive regime, the two transmons interact via virtual excitation of the cavity, giving rise to an effective transmon-transmon coupling.
Imperfect detectors still help qubits stay entangled longer
The researchers investigate the role of continuous measurement and postselection in the dynamics and entanglement of a transmon-cavity-transmon coupled system, demonstrating that postselection significantly slows down the decay of entanglement compared to the unmonitored case. In the dispersive regime, the two transmons interact via virtual excitation of the cavity, giving rise to an effective transmon-transmon coupling.