Initialization of Single Spin Dressed States using Shortcuts to Adiabaticity

Area of Science:

• Quantum physics
• Quantum information science
• Spin dynamics

Background:

• Dressed states offer enhanced coherence protection compared to two-level systems.
• Efficient control and manipulation of these states are crucial for quantum technologies.

Purpose of the Study:

• To demonstrate shortcuts to adiabaticity protocols for initializing, reading out, and coherently controlling dressed states of a single spin.
• To accelerate state transfer processes while maintaining high fidelity.

Main Methods:

• Implementation of closed-contour, coherent driving for generating dressed states.
• Application of shortcuts to adiabaticity protocols for state transfer.
• Utilizing bidirectionality of accelerated state transfer for population read-out.

Main Results:

• Achieved state transfer fidelity of approximately 99.4(2)%.
• Accelerated state transfer speed by a factor of 2.6 compared to the adiabatic approach.
• Demonstrated direct dressed state population read-out after coherent manipulation.

Conclusions:

• Shortcuts to adiabaticity provide an efficient and fast method for controlling coherence-protected dressed states.
• The developed protocols enable direct access to these states for quantum information processing and sensing.
• This work paves the way for advanced applications leveraging enhanced coherence properties of dressed states.