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Wednesday, February 15, 2017 11:30 am - 11:30 am EST (GMT -05:00)

Seminar: Mehran Vahdani

Carbon nanotube forest from energy conversion to MEMS devices and a laser based single sub 10nm particle analyzer: new developments in nanotechnology

​Mehran Vahdani, The University of British Columbia

Vertically aligned carbon nanotubes, so called CNT forests, have unique properties that make them excellent candidates in a wide variety of applications ranging from nanotechnology to electronics and photonics.

Monday, February 13, 2017 4:00 pm - 4:00 pm EST (GMT -05:00)

Seminar: William Slofstra

The mathematics of non-local games

William Slofstra, Institute for Quantum Computing

Non-local games are an important subject in quantum information. They provide relatively simple experimental scenarios for testing the axioms of quantum mechanics, and have been proposed for other practical applications, especially in device-independent cryptography. However, we do not know how to answer many of the basic mathematical questions about non-local games.

Wednesday, February 8, 2017 9:30 am - 9:30 am EST (GMT -05:00)

Seminar: Beni Yoshida

Quantum error-correction in black holes

Beni Yoshida, Perimeter Institute

It is commonly believed that quantum information is not lost in a black hole. Instead, it is encoded into non-local degrees of freedom in some clever way; like a quantum error-correcting code. In this talk, I will discuss recent attempts to resolve some paradoxes in quantum gravity by using the theory of quantum error-correction.

Friday, February 10, 2017 11:45 am - 11:45 am EST (GMT -05:00)

RAC1 Journal Club/Seminar Series:

Atomic scale study of Dirac materials: graphene and topological insulator (Bi2Se3)

Ying Liu

Graphene and topological insulator Bi2Se3 are newly discovered Dirac materials with exotic physical and electronic properties. The molecular beam epitaxy (MBE) and in situ characterization at atomic scale of the materials are demonstrated in this talk[1][2]. Artificial defects of graphene are created by Ar for extending its functions. Their structural, electronic properties and charge state were studied by scanning tunneling microscopy (STM) and q-plus atomic force microscopy (q-plus AFM ), respectively.

Monday, February 6, 2017 2:00 pm - 2:00 pm EST (GMT -05:00)

Seminar: Simon Gröblacher

Quantum experiments exploiting the radiation pressure interaction between light and matter

Simon Gröblacher, Delft University of Technology

Mechanical oscillators coupled to light via the radiation pressure force have attracted significant attention over the past years for allowing tests of quantum physics with massive objects and for their potential use in quantum information processing. Recently demonstrated quantum experiments include entanglement and squeezing of both the mechanical and the optical mode.

Wednesday, February 1, 2017 11:45 am - 11:45 am EST (GMT -05:00)

Seminar: Mathieu Lauriere

Extended Learning Graphs for Triangle Finding

Mathieu Lauriere, New York University, Shanghai

In this talk we present new quantum algorithms for Triangle Finding improving its best previously known quantum query complexities for both dense and spare instances. For dense graphs on n vertices, we get a query complexity of O(n^{5/4}) without any of the extra logarithmic factors present in the previous algorithm of Le Gall [FOCS’14]. For sparse graphs we also improve some of the results obtained by Le Gall and Nakajima [ISAAC’15].

Friday, February 3, 2017 2:00 pm - 2:00 pm EST (GMT -05:00)

Seminar: Justin Bohnet

Entanglement in a synthetic quantum magnet made of hundreds of trapped ions

Justin Bohnet, National Institute of Standards and Technology, Boulder

Entanglement between individual quantum objects exponentially increases the complexity of quantum many-body systems, such that models with more than 40 quantum bits cannot be fully studied using conventional techniques on classical computers. To make progress at this frontier of physics, Feynman’s pioneering ideas of quantum computation and quantum simulation are now being pursued in a wide variety of well-controlled platforms.

Friday, February 3, 2017 10:30 am - 10:30 am EST (GMT -05:00)

Seminar: Peter Geltenbort

Research with very cold and ultra-cold neutrons at the Institute Laue Langevin in Grenoble

Peter Geltenbort, Institute Laue Langevin, Grenoble

Due to their outstanding property to be storable and hence observable for long periods of time (several hundreds of seconds) in suitable material or magnetic traps, ultra-cold neutrons (UCN) with energies around 100 neV are an unique tool to study fundamental properties of the free neutron, like its beta-decay lifetime, its electric dipole moment and its wave properties.

Tuesday, January 24, 2017 3:00 pm - 3:00 pm EST (GMT -05:00)

Seminar: Milena Grifoni

Informal conversation with Dr. Milena Grifoni, University of Regensburg

​Presented by: Fem Phys and Women in Science

​Join Fem Phys and Women in Science for an informal conversation with Dr. Milena Grifoni about her career in physics. Dr. Grifoni researches quantum transport in nanoscale systems and quantum dissipation at the University of Regensburg in Germany. Coffee and cookies will be provided. All are welcome. 

Friday, January 27, 2017 11:45 pm - 11:45 pm EST (GMT -05:00)

RAC1 Journal Club/Seminar Series: Chris Pugh

Airborne demonstration of a QKD payload receiver

Chris Pugh, IQC

We demonstrate the viability of components of a quantum receiver satellite payload by successfully performing quantum key distribution in an uplink configuration to an airplane. Each component has a clear path to flight for future satellite integration.