Coherent Control with User-Defined Passage

TL;DR

This paper introduces a generalized STIRUP method for fast, robust quantum state control that overcomes decoherence and is compatible with complex systems, demonstrated through high-fidelity quantum state transfer and entanglement in superconducting circuits.

Contribution

The paper develops a more general and simpler STIRUP method that outperforms shortcut to adiabaticity techniques and applies it to complex quantum systems.

Findings

Generalized STIRUP is faster and more robust than traditional STIRAP.

Demonstrated high-fidelity quantum state transfer in superconducting circuits.

Achieved robust entangled state generation using the new method.

Abstract

Stimulated Raman adiabatic passage (STIRAP) is a standard technique to combat experimental imperfections and can be used to realize robust quantum state control, which has many applications in physics, chemistry, and beyond. However, STIRAP is susceptible to decoherence since it requires long evolution time. To overcome this problem, stimulated Raman user-defined passage (STIRUP) is proposed, which allows users to design the passages unlike the STIRAP but fast and robust against both decoherence and experimental imperfections. Here, we further develop a more general STIRUP method. Comparing with shortcut to adiabaticity and its' variants, the generalized STIRUP is more simpler and compatible with more complex energy-level structure and manybody systems. Furthermore, the generalized STIRUP has many important applications such as geometric phase measurement, coherent population transfer, and quantum state preparation. Specifically, as examples, we show how to realize the high-fidelity quantum state transfer and entangled state generation in a robust way via STIRUP with the state-of-the-art experimental superconducting circuits.