Physics and Astronomy Calendar

semester, 2018


Thursday, January 25th 2018
Speaker: TBD
Subject: TBD

Wednesday, January 31st 2018
1:30 pm:
Speaker: Sergey Frolov (Pittsburgh)
Subject: Quantum dot chains as emulators of topological superconductors

Tunneling spectroscopy measurements on one-dimensional superconducting hybrid materials have revealed signatures of Majorana fermions which are the edge states of a bulk topological superconducting phase. We couple strong spin-orbit semiconductor InSb nanowires to conventional superconductors (NbTiN, Al) to obtain additional signatures of Majorana fermions and to explore the magnetic-field driven topological phase transition. Specifically, we map out the phase diagram of the topological phase in the space of Zeeman energy and chemical potential, and investigate the apparent closing and re-opening of the superconducting gap. We investigate how the topological superconducting phase would manifest in finite size systems, by electrostatically splitting the wire into segments of varied length. By chaining up several segments of a nanowire, we are realizing a quantum simulator of the Kitaev chain with tunable on-site energies and couplings between the sites, a step towards quantum simulation with semiconductor nanostructures.

Faculty Host: Vlad Pribiag

Thursday, February 1st 2018
Speaker: TBD
Subject: TBD

Wednesday, February 7th 2018
1:30 pm:
Speaker: Cristian Batista (Tennessee)
Faculty Host: Natalia Perkins

Thursday, February 8th 2018
Speaker: Cristian Batista (Tensessee)
Subject: TBD
Faculty Host: Natalia Perkins

Thursday, February 15th 2018
08:00 am:
Speaker: TBD
Subject: TBD

Wednesday, February 21st 2018
1:25 pm:
Speaker: Erez Berg (U of Chicago)
Faculty Host: Rafael Fernandes

Thursday, February 22nd 2018
Speaker: Erez Berg (University of Chicago)
Subject: TBD
Faculty Host: Paul Crowell

Wednesday, February 28th 2018
Speaker: Antoine Georges (College de France & Simons Foundation)
Subject: To be announced.
Faculty Host: Martin Greven
4:30 pm:
See Joint Quantum Materials & Condensed Matter Seminar on Thursday this week only.

Thursday, March 1st 2018
Speaker: TBD
Subject: TBD

Thursday, March 8th 2018
Speaker: TBD
Subject: TBD

Thursday, March 15th 2018
Subject: There will be no colloquium this week due to Spring Break

Wednesday, March 21st 2018
1:25 pm:
Speaker: Pablo Jarillo-Herrero, MIT
Subject: TBD
Faculty Host: Vlad Pribiag

Thursday, March 22nd 2018
Speaker: Pablo Jarillo-Herrero (MIT)
Subject: TBD
Faculty Host: Paul Crowell

Wednesday, March 28th 2018
1:30 pm:
Speaker: Paul Canfield (Iowa State)
Subject: TBD
Faculty Host: Martin Greven

Thursday, March 29th 2018
Speaker: TBD
Subject: TBD

Thursday, April 5th 2018
Speaker: TBD
Subject: TBD

Thursday, April 12th 2018
Speaker: TBD
Subject: TBD

Wednesday, April 18th 2018
1:30 pm:
Speaker: Ali Yazdani (Tentative)
Faculty Host: Paul Crowell

Thursday, April 19th 2018
Speaker: Ali Yazdani (Princeton University)
Subject: TBD
Faculty Host: Paul Crowell

Thursday, April 26th 2018
Speaker: TBD
Subject: TBD

Thursday, May 3rd 2018
Speaker: TBD
Subject: TBD

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