Microwave Amplifiers for Quantum Information Processing with Florent Q. Lecocq

Speaker Florent Q. Lecocq explains the use of microwave amplifiers for QIP.


In the late 2000s, the application of low-noise parametric amplifiers to cryogenic microwave measurements revolutionized the field of quantum information processing with superconducting circuits. For example, it enabled high-fidelity dispersive qubit readout, a ubiquitous tool in current superconducting quantum computers. Importantly, it also enabled new classes of experiments relying on weak measurements, including, for instance, analog quantum feedback and the observation of quantum trajectories. Since then, large efforts have been dedicated to improving various metrics of these amplifiers such as bandwidth, power handling, added noise, or directionality.

In this talk I will give an overview of the state-of-the-art and discuss the future directions for the next generation of microwave amplifiers. In particular, I will discuss the elusive integration of these amplifiers with the quantum devices under test, in the context of scalable quantum computing and high-efficiency quantum information processing.


Florent Lecocq is a research scientist at the National Institute of Standards and Technology (NIST) in Boulder, in the Advanced Microwave Photonics group. The group focuses on developing technologies for quantum measurements and quantum information science using superconducting circuits. This includes the development of high-speed parametric qubit gates, nonreciprocal parametric amplifiers, microwave opto-mechanical devices and microwave-to-optical interconnects. Florent received his PhD in physics from the University of Grenoble and the Néel Institute before joining NIST in 2011


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