Creating and transporting Trojan wave packets

Area of Science:

• Atomic physics
• Quantum mechanics
• Laser-matter interactions

Background:

• Trojan wave packets are unique quantum states exhibiting classical-like trajectories.
• Controlling atomic energy levels is crucial for quantum technologies.
• Previous methods for exciting atoms to high energy states had limitations in efficiency and control.

Purpose of the Study:

• To develop an efficient method for transporting atoms to higher energy Trojan states.
• To investigate the dynamics of Trojan wave packets under external electric fields.
• To achieve high fidelity transfer of atoms to highly excited states.

Main Methods:

• Creation of nondispersive localized Trojan wave packets in near-circular Bohr-like orbits.
• Application of a linearly polarized sinusoidal electric field with a slowly increased period.
• Utilizing classical trajectory Monte Carlo simulations to validate experimental findings.

Main Results:

• Successful transport of Trojan wave packets to higher principal quantum number (n) states (n(f) ~ 600) from initial states (n(i) ~ 305).
• Achieved over 80% efficiency in transferring atoms to these higher energy states.
• Experimental results were corroborated by classical trajectory Monte Carlo simulations, confirming the robustness of the protocol.

Conclusions:

• The developed protocol demonstrates a highly efficient method for atomic excitation to high-n Trojan states.
• Slowly increasing the period of the driving electric field is key to the successful transport and high efficiency.
• This technique offers a promising pathway for precise control and manipulation of highly excited atomic states.