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Nonreciprocal photon transmission and amplification via reservoir engineering

March 31, 2015 - 11:00am
Anja Metelmann
McGill University

The general desire to break  reciprocity in engineered photonic structures has garnered an immense amount of recent interest.   For example nonreciprocal microwave-frequency devices are crucial to efforts at quantum-information processing with superconducting circuits. We discuss a general method for constructing nonreciprocal, cavity-based photonic devices, based on matching a given coherent interaction with its corresponding dissipative counterpart;  it generalizes the basic structure used in the theory of cascaded quantum systems. In contrast to interference-based schemes, our approach allows directional behaviour over a wide bandwidth. We show how it can be used to devise isolators and directional, quantum-limited amplifiers; of particular interest is a directional phase-sensitive amplifier which is not limited by any fundamental gain-bandwidth constraint. Our approach is particularly well-suited to implementations using superconducting microwave circuits.

Host- Mohammad Hafezi

2115 Computer and Space Sciences
College Park, MD 20742

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