Landau-Zener-Stuckelberg-Majorana interference in a 3D transmon driven by a chirped microwave

TL;DR

This paper demonstrates how chirped microwave driving of a 3D transmon can produce Landau-Zener-Stückelberg-Majorana interference, offering a new method for quantum control applicable to systems without intrinsic avoided crossings.

Contribution

It introduces a novel approach using microwave chirping to induce interference in transmons, expanding quantum control techniques beyond systems with natural avoided crossings.

Findings

Interference patterns match numerical simulations

Method applicable to other quantum systems

Provides an alternative quantum control approach

Abstract

By driving a 3D transmon with microwave fields, we generate an effective avoided energy-level crossing. Then we chirp microwave frequency, which is equivalent to driving the system through the avoided energy-level crossing by sweeping the avoided crossing. A double-passage chirp produces Landau-Zener-St\"uckelberg-Majorana interference that agree well with the numerical results. Our method is fully applicable to other quantum systems that contain no intrinsic avoided level crossing, providing an alternative approach for quantum control and quantum simulation.