
We kindly invite you to the next meeting of the Modern Trends in Physics Research seminar to be held on January 27, 2021, 13:00 – 14:00 (an informal part starts at 12:30). Prof. Adam Miranowicz (Faculty of Physics, Adam Mickiewicz Univeristy in Poznań, Poznań, Poland) will speak about: Quantum technologies using circuit QED: From strong to ultrastrong coupling of light and matter.
The link to the Microsoft Teams meeting is HERE
The guest from the outside of the AMU network, using this link, will be granted individual access permissions by the MTPR staff.
Please, follow the news on the MTPR web page ( http://mtpr.amu.edu.pl ), where the links to the subsequent events will be available in due time.
Sincerely Yours
Sławomir Breiter
Jacek Gapiński
Jarosław W. Kłos
Abstract:
I will give a pedagogical introduction to circuit quantum electrodynamics (circuit-QED), which describes fundamental interactions between light and matter on a chip with superconducting quantum circuits (SQCs) [1]. Here, the matter is represented by superconducting artificial atoms (SQCs) and photons are generated and stored in on-chip microwave resonators (like transmission line resonators). Thus, circuit-QED can be considered analogous to cavity-QED, but with SQCs instead of natural atoms and standard optical cavities. The interaction between matter (SQCs) and light (i.e., single microwave photons) can reach the regimes beyond weak and strong coupling to make the coupling strength comparable to the transition frequencies of a given system. Such regimes are referred to as ultrastrong and deep-strong coupling regimes, which enable the observation of fundamentally new phenomena [2]. I will describe some of these effects (including the generation of giant Schrödinger cats [3]) together with their applications for quantum information processing.
[1] X. Gu, A. F. Kockum, A. Miranowicz, Y.-X. Liu, and F. Nori:
Microwave photonics with superconducting quantum circuits, Physics Reports, 718–719, 1–102 (2017).
[2] A. F. Kockum, A. Miranowicz, S. De Liberato, S. Savasta, and F. Nori:
Ultrastrong coupling between light and matter, Nature Reviews Physics, 1, 19–40 (2019).
[3] Y.-H. Chen, W. Qin, X. Wang, A. Miranowicz, and F. Nori:
Shortcuts
to Adiabaticity for the Quantum Rabi Model: Efficient Generation of
Giant Entangled Cat States via Parametric Amplification, Phys. Rev.
Lett. 126, 023602 (2021).
Informację wprowadził/a: Marek Nowak
Wydział Fizyki UAM, ul. Uniwersytetu Poznańskiego 2, 61-614 Poznań, Biuro Obsługi Wydziału: tel. +48 61 829-5202, e-mail: fizyka@amu.edu.pl, Biuro Obsługi Studentów: tel. +48 61 829-5152, e-mail: dziekfiz@amu.edu.pl
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