Experimental implementation of assisted quantum adiabatic passage in a single spin

Area of Science:

• Quantum physics
• Quantum information science
• Solid-state spin systems

Background:

• Quantum adiabatic passage is a fundamental technique for state preparation.
• Achieving adiabatic passage often requires very slow transitions, limiting practical applications.
• Counter-diabatic driving offers a way to accelerate these passages.

Purpose of the Study:

• To implement and demonstrate accelerated quantum adiabatic passages using counter-diabatic fields.
• To apply this technique to the electron spin of a single nitrogen-vacancy (NV) center in diamond.
• To explore and compare two distinct counter-diabatic driving schemes.

Main Methods:

• Implementation of counter-diabatic driving on a single NV center electron spin.
• Demonstration of a scheme closely following the Demirplak and Rice procedure.
• Development and testing of a rapid-scan approach with a time-varying phase control field.

Main Results:

• Successful acceleration of quantum adiabatic passages on the NV center spin.
• The rapid-scan approach, with constant amplitude and time-varying phase, achieved faster resonance passage.
• The rapid-scan method shows applicability to systems with shorter decoherence times.

Conclusions:

• Counter-diabatic fields effectively accelerate quantum adiabatic passages.
• The rapid-scan approach offers a significant speedup and broader applicability for quantum control.
• This work advances techniques for robust quantum state manipulation in solid-state systems.