University COVID-19 update

The University of Waterloo is constantly updating our most Frequently Asked Questions.

Questions about buildings and services? Visit the list of Modified Services.

Please note: The University of Waterloo is closed for all events until further notice.

Tutte Colloquium - Alicia KollárExport this event to calendar

Friday, April 9, 2021 — 3:30 PM EDT

Title: Circuit QED Lattices: Synthetic Quantum Systems on Line Graphs

Speaker: Alicia Kollár
Affliliation: University of Maryland
Zoom: Contact Emma Watson

Abstract:

After two decades of development, superconducting circuits have emerged as a rich platform for quantum computation and simulation. Lattices of coplanar waveguide (CPW) resonators realize artificial photonic materials or photon-mediated spin models. Here I will highlight the special property that these lattice sites are deformable and allow for the implementation of devices with graph-like configurational flexibility. In particular, I will show that it is possible to create synthetic materials in which microwave photons experience negative curvature, which is impossible in conventional electronic materials [1]. Furthermore, I will show that the one-dimensional nature of CPW resonators naturally implements line graphs and that lattices can be designed which host a spectrally-isolated degenerate set of compact-support localized eigenfunctions [2]. Finally, I will present joint work with Peter Sarnak where we show that the spectral gaps possible in these types of systems are limited in size, but not in location [2,3].

[1] Kollar, Fitzpatrick, Houck, Nature 45, 571 (2019).

[2] Kollar, Fitzpatrick, Sarnak, Houck, Comm. Math. Phys. 376, 1909-1956 (2020).

[3] Kollar, Sarnak, arXiv:2005.05379 (2020)

Event tags 

S M T W T F S
28
29
30
31
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
1
  1. 2021 (56)
    1. June (9)
    2. May (7)
    3. April (9)
    4. March (13)
    5. February (8)
    6. January (10)
  2. 2020 (119)
    1. December (5)
    2. November (12)
    3. October (12)
    4. September (12)
    5. August (11)
    6. July (17)
    7. June (11)
    8. May (6)
    9. March (11)
    10. February (11)
    11. January (11)
  3. 2019 (167)
  4. 2018 (136)
  5. 2017 (103)
  6. 2016 (137)
  7. 2015 (136)
  8. 2014 (88)
  9. 2013 (48)
  10. 2012 (39)
  11. 2011 (36)
  12. 2010 (40)
  13. 2009 (40)
  14. 2008 (39)
  15. 2007 (15)