Superadiabatic population transfer in a three-level superconducting circuit

Abstract

We experimentally demonstrate robust superadiabatic population transfer close to the quantum speed limit.

Simulating Spin Chains Using a Superconducting Circuit: Gauge Invariance, Superadiabatic Transport, and Broken Time‐Reversal Symmetry

“…In three‐level systems one can use this pulse sequence to realize the superadiabatic STIRAP (saSTIRAP), provided that active time‐domain compensation for ac Stark shifts is performed. [ 47–49 ] The results present here show that it is possible to have significant population transfer also in the absence of this technique, simulating the transport in spin chains in the realistic experimental conditions when the presence of energy shifts due to magnetic fields or shifts due to modulation of the couplings.…”

“…These shifts are expected to occur also in the spin chain, where they will appear as inhomogenous broadening. In principle it is possible to exactly cancel these shifts by techniques such as time‐dependent frequency corrections [ 47–49 ] or by an additional two‐photon drive, designed with a detuning with opposite sign and a π phase in one of the drives. [ 50 ] However, whether these techniques can be implemented depends on the particular physical system and the associated array of available experimental methods.…”

Focus on Shortcuts to Adiabaticity

“…Mortensen et al [42] account simultaneously for the cost and robustness of STA by optimizing a cost functional that incorporates both the resource requirements and a source of perturbations, to favor robustness. The authors apply this approach to the paradimatic Λ-system, whose control by STA has been well studied since the pioneering works by Demirplak and Rice on counterdiabatic driving [4,5,43] and implemented in the laboratory [44] (see as well [94] for a related implementation in a ladder configuration in superconducting qubits).…”

Complete energy conversion between light beams carrying orbital angular momentum using coherent population trapping for a coherently driven double- Λ atom-light-coupling scheme

“…Let us consider the efficiency of frequency conversion from initial vortex beam Ω p1 to the generated vortex beam Ω p2 for z L abs described by Eq. (14). The efficiency of vortex conversion between different frequencies is…”