CENTER FOR QUANTUM MATERIALS AND CONDENSED MATTER PHYSICS SEMINARS

 NEWS: During the spring 2020 semester, the Long Island Condensed Matter Social Distancing Journal Club will replace most seminars.

Journal Club events will be posted on this calendar and take place via Zoom. To join the mailing list and get the link, email Mengkun Liu (first name.lastname@stonybrook.edu)

The CQM Distinguished Lecture series has been established  in the Fall of 2015 to bring to Stony Brook University the renown experts in the physics of quantum matter.

The lectures in this series will attract a broad audience of physicists from SBU and BNL,
and SBU graduate students.

June – September 2020

Jun
5
Fri
JOURNAL CLUB: Matt Dawber (SBU)
Jun 5 @ 10:00 am – 11:00 am
Jun
19
Fri
Jigang Wang (Iowa State and Ames Lab)
Jun 19 @ 1:30 pm – 2:30 pm

Quantum Coherence and Dynamics Controlled by Light: 

From Higgs Bosons to Chiral Fermions

  Jigang Wang

Department of Physics & Astronomy and Ames Laboratory-U.S. DOE, Iowa State University, Ames, IA 50011, USA

Revolutionary properties of quantum materials are often manifestations of coherence and entanglement, e.g. it exists between the Cooper pairs in high-temperature superconductors (SCs); it protects chiral charge transport from disorder scattering in topological states of matter (TSM). The recent development of ultrafast and terahertz (THz) spectroscopy tools facilitates discovering and understanding driven coherent systems involving SCs and TSM controllable by light. In this talk, I will discuss strategic advantages, with help of some recent examples, of implementing this approach to probe and control many-body quantum phases and collective modes by light-driven coherence, e.g., light-induced gapless superconductivity and high harmonics generation [1], forbidden Anderson pseudo-spin precessions [2], hidden gapless quantum fluid [3], hybrid Higgs modes [4], spin exciton modes [5], phonon-controlled topology switching [6, 7] and chiral charge pumping [8]…. We argue that the light-driven coherence and sub-cycle dynamic symmetry breaking demonstrated in these work revealed represent universal principles for emergent materials discovery and light-matter quantum control for quantum information science.

[1]  X. Yang, et al., Nature Photonics. 13, 707 (2019)

[2] C. Vaswani et al., Phys. Rev. Lett. arXiv:1912.01676 (2020)

[3] X. Yang, et al., Nature Materials. 17, 586 (2018).

[4] C. Vaswani, et al., submitted (2020)

[5] X. Yang, et al., Phys. Rev. Lett. 121, 267001 (2018)

[6] C. Vaswani, et al., Phys Rev X 10, 021013 (2020).

[7] X. Yang, et al., npj Quantum Materials 5, 13 (2020).

[8] L. Luo et al., submitted (2020)

Jun
26
Fri
Liang Jiang (The University of Chicago)
Jun 26 @ 1:30 pm – 2:30 pm
Title: Robust Quantum information Processing with Bosonic Modes

Abstract: Bosonic modes are widely used for quantum communication and information processing. Recent developments in superconducting circuits enable us to control bosonic microwave cavity modes and implement arbitrary operations allowed by quantum mechanics, such as quantum error correction against excitation loss errors. We investigate various bosonic codes, error correction schemes, and potential applications.
Sep
11
Fri
Adarsh Ganesan (NIST)
Sep 11 @ 1:30 pm – 2:30 pm

Title: TBD

host: Phil