Quantum superposition in ultra-high mobility 2D photo-transport

Area of Science:

• Condensed Matter Physics
• Quantum Mechanics

Background:

• Investigating magnetoresistance in two-dimensional electron systems (2DES) at ultra-high mobility and low temperatures.
• Observing anomalous phenomena: abrupt magnetoresistance collapse and resonance peak shift to the second harmonic.

Purpose of the Study:

• Explain the observed magnetoresistance properties in high-mobility 2DES.
• Explore the role of quantum superposition and Schrödinger cat states.
• Assess the potential of these systems for quantum computing.

Main Methods:

• Theoretical investigation using the principle of quantum superposition.
• Analysis of Schrödinger cat states (even and odd) and their dynamics.
• Incorporation of the Aharonov-Bohm effect in scattering processes.

Main Results:

• Schrödinger cat states explain the resonance peak shift to the second harmonic due to whole-system oscillation.
• Scattering processes involving odd Schrödinger cat states cause magnetoresistance collapse.
• The Aharonov-Bohm effect converts even cat states to odd ones, contributing to collapse.

Conclusions:

• Schrödinger cat states are crucial for understanding magnetoresistance in ultra-high mobility 2DES.
• These systems offer a promising platform for bosonic mode-based quantum computing.