Dear colleagues,
This week we are looking forward to a talk by Anja Metelmann, who is
currently a post-doc in Aash Clerk's group at McGill University in
Montreal, Canada- one of few places still colder than Boston.
Kind regards,
Richard and Swati
*--------------*
*ITAMP Topical Lunch Discussion*
Date: Friday, Feb. 20th
Time: 12:00-1:30 pm
Pizza will be served.
Location: B-106 @ Center for Astrophysics (60 Garden Street)
Directions: after entering the lobby of the CfA, turn right to enter the
hallway of the B building. In the hallway, turn right again, and B-106 is
there.
*Speaker: *Dr. Anja Metelmann- McGill University
*Title: *Non-reciprocal photon transmission and amplification via reservoir
engineering
*Abstract: *The general desire to break reciprocity in engineered photonic
structures has garnered an immense amount of recent interest. For example
non-reciprocal microwave-frequency devices are crucial to efforts at
quantum-information processing with superconducting circuits. We discuss a
general method for constructing non-reciprocal, 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.
--
Dr. Swati Singh
Institute for Theoretical Atomic, Molecular, and Optical Physics (ITAMP),
Harvard-Smithsonian Center for Astrophysics,
60 Garden Street, MS-14,
Cambridge, MA 02138
https://www.cfa.harvard.edu/~ssingh/