Light-matter interactions in superconducting quantum circuits (Webinar)

padniuk, pon., 02/22/2021 - 11:26
PRELEGENT: 
prof. Adam Miranowicz
DataSeminarium: 
2021-03-01
AfiliacjaPrelegenta: 
UAM, Poznań
AbstraktSeminarium: 
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 Schr\"odinger cats [3])
together with their applications for quantum technologies of
second and third generations.
[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).

Co-authors: Anton Kockum, Simone De Liberato, Salvatore Savasta, and Franco Nori.

To participate in the seminar, please, contact dr Szymon Pustelny (szymon.pustelny@uj.edu.pl).

Link to the MS Teams channel: https://teams.microsoft.com/l/channel/19%3a3721f0b9286c47c78efdd4f33e6ad...