Experimental demonstration of robustness under scaling errors for superadiabatic population transfer in a superconducting circuit

Abstract

We study experimentally and theoretically the transfer of population between the ground state and the second excited state in a transmon circuit by the use of superadiabatic stimulated Raman adiabatic passage (saSTIRAP). We show that the transfer is remarkably resilient against variations in the amplitudes of the pulses (scaling errors), thus demostrating that the superadiabatic process inherits certain robustness features from the adiabatic one. In particular, we put in evidence a new plateau that appears at high values of the counterdiabatic pulse strength, which goes beyond the usual framework of saSTIRAP.

Perfect stimulated Raman adiabatic passage with imperfect finite-time pulses

“…In superadiabatic(sa)-STIRAP in three-level systems, an additional counterdiabatic pulse is needed, realizing direct coupling between the initial and the target states. A circuit QED based setup implementing saSTIRAP protocol in a threelevel system has been demonstrated in reference [18] and its robustness against various experimental imperfections has been analysed in reference [19].…”

Efficient Population Transfer in a Λ‐Type Quantum System Coupled to a Gold Nanoparticle Using STIRAP Shortcuts

“…Most importantly, STI-RAP shortcuts have been proven to be quite robust against noise, too. [27][28][29][30][31] Recently, the optical properties of QSs placed in proximity to plasmonic nanostructures have received significant attention in the field of nanophotonics, because such plasmonic nanostructures can significantly modify the electromagnetic (EM) environment around them. More specifically, surface plasmon resonances, which occur in metallic nanoparticles (MNP), allow for strong light-matter interaction coupling between the QS and the plasmonic nanoparticle, thus modifying the Rabi frequencies of external electromagnetic pulses [32][33][34][35][36][37] and the free-space spontaneous decay rates of the QS, [38][39][40][41][42][43] depending on the size, shape, and material of the nanostructure.…”