Time dynamics of multi-photon scattering in a two-level mixer

Abstract

A superconducting qubit in a waveguide behaves as a point-like nonlinear element. If irradiated with nearly resonant microwave pulses, the qubit undergoes quantum evolution and generates coherent fields at sideband frequencies due to elastic scattering. This effect is called Quantum Wave Mixing (QWM), and the number of emerged side components depends on the number of interacting photons. By driving a superconducting qubit with short pulses with alternating carrier frequencies, we control the maximal number of photons simultaneously interacting with a two-level system by varying the number and duration of applied pulses. Increasing the number of pulses results in consecutive growth of the order of non-linearity, which manifests in additional coherent side peaks appearing in the spectrum of scattered radiation while the whole spectrum maintains its asymmetry.

References in corpus (5)

• Charge insensitive qubit design derived from the Cooper pair box
• Resonance fluorescence from a coherently driven semiconductor quantum dot in a cavity
• Efficient and robust analysis of complex scattering data under noise in microwave resonators
• Quantum wave mixing and visualisation of coherent and superposed photonic states in a waveguide
• Effects of photon statistics in wave mixing on a single qubit

Cited by in corpus (2)

• Direct experimental observation of sub-poissonian photon statistics by means of multi-photon scattering on a two-level system
• Evolution of coherent waves driving a single artificial atom