Derives quantum-limited gain, noise, and clamping for acoustoelectric amplification in a piezoelectric-2DEG heterostructure, showing efficient operation for wavelengths longer than electron spacing.
Let us first assume that the input phonon field is in a coherent state|α⟩
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Quantum-Limited Acoustoelectric Amplification in a Piezoelectric-2DEG Heterostructure
Derives quantum-limited gain, noise, and clamping for acoustoelectric amplification in a piezoelectric-2DEG heterostructure, showing efficient operation for wavelengths longer than electron spacing.