Controlling chaos-assisted directed transport via quantum resonance

Area of Science:

• Quantum physics
• Nonlinear dynamics
• Condensed matter physics

Background:

• Optical lattices are crucial for controlling quantum particles.
• Understanding chaotic dynamics is key to novel transport phenomena.
• Directed transport in quantum systems remains a significant challenge.

Purpose of the Study:

• To demonstrate chaos-assisted directed transport of a quantum particle.
• To investigate the control of transport velocity via system parameters.
• To explore the role of classical chaotic orbits in quantum transport.

Main Methods:

• Utilizing an amplitude-modulated and tilted optical lattice.
• Employing resonance-induced double-mean displacement.
• Analyzing the influence of driving amplitude, tilt sign, and initial state phase.

Main Results:

• First experimental demonstration of chaos-assisted directed transport.
• Transport velocity is tunable by driving amplitude and tilt.
• Initial state phase significantly affects transport behavior.

Conclusions:

• Chaos-assisted transport provides a novel mechanism for controlling quantum particles.
• The findings can be experimentally verified using single-atom detection.
• This approach has potential applications across various scientific fields.