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Thursday, January 25th 2018

Wednesday, January 31st 2018

1:30 pm:

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.

Thursday, February 1st 2018

Wednesday, February 7th 2018

1:30 pm:

Thursday, February 8th 2018

3:35 pm:

Thursday, February 15th 2018

Wednesday, February 21st 2018

1:25 pm:

Thursday, February 22nd 2018

3:35 pm:

Wednesday, February 28th 2018

1:30 pm:

4:30 pm:

Thursday, March 1st 2018

Thursday, March 8th 2018

Thursday, March 15th 2018

3:35 pm:

Wednesday, March 21st 2018

1:25 pm:

Thursday, March 22nd 2018

3:35 pm:

Wednesday, March 28th 2018

1:30 pm:

Thursday, March 29th 2018

Thursday, April 5th 2018

Thursday, April 12th 2018

Wednesday, April 18th 2018

1:30 pm:

Thursday, April 19th 2018

3:35 pm:

Thursday, April 26th 2018

Thursday, May 3rd 2018

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