Events

SBQMI hosts numerous academic and other events throughout the year. Please search by audience or event type, or enter a keyword, to find events of interest to you.

If you are interested in inviting our faculty as keynote speakers at your event, or are a school group interested in visiting our labs, please contact us to submit your request.

Field induced phase transition in one dimensional Heisenberg antiferromagnet model studed using density matrix renormalization group

31 Mar2017

Speaker: Peter Gustainis, Affleck group, UBC

Time: Fri, 2017-03-31 13:00 - 14:00

Location: Hennings 309

This presentation will examine the Heisenberg antiferromagnetic spin chain in one dimension (1D) with a crystal field splitting term and applied magnetic field term. We use theoretical techniques from quantum field theory and conformal field theory (CFT) to make predictions about the excitation spectrum for our model. We then use Density Matrix Renormalization Group (DMRG) umerical techniques to simulate...

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Constrained Path Monte Carlo: recent development and application

23 Mar2017

Speaker: Mingpu Qin

Time: Thursday March 23, 2017 at 2:00 pm

Location: Hennings 318

I will first give a brief introduction of the auxiliary field Quantum Monte Carlo (AFQMC) method. Then I will discuss the minus sign problem and the constrained path Monte Carlo (CPMC) ethod which was designed to attack the minus sign problem. Finally I will present our recent development, the self-consistent CPMC method and discuss the application of this method...

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New tools to simulate strongly correlated systems

03 Mar2017

Speaker: Norman Tubman

Time: Friday March 3rd, 2017 - 3:00 PM

Location: Hennings 304

Strongly correlated systems are some of the most difficult to simulate with electronic structure methods. The most widely used techniques, for simulating realistic materials, lose their predictive power when electron correlations are important. For example, there remain many open questions about the electronic properties of the high temperature superconducting cuprate materials.

Recent developed methods, that can simulate...

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Orbital and magnetic excitations in the spin-chain compound TiPO4

02 Mar2017

Speaker: Jochen Geck

Time: Thursday March 2, 2017 - 2:00 PM

Location: Hennings 318

We present high-resolution resonant inelastic x-ray scattering data as well many-body quantum chemistry calculations for the spin-chain compound TiPO4. This combined approach allows identifying the d-level electron configuration of Ti in this material, which is found to be at odds with canonical local ligand-field theory. Specifically, we find the ground state to be composed of an admixture of z2...

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Quantum simulation with superconducting circuits

20 Feb2017

Speaker: Dr. Oleksandr Kyriienko, Postdoctoral Researcher at the Niels Bohr Institute (Copenhagen, Denmark)

Time: Monday February 20th, 2017, 1:30 pm

Location: AMPEL 311

The general goal of a quantum simulator is to mimic the behaviour of a system of interest using another well-controlled quantum setup. Offering a potential to solve classically intractable quantum problems, it will allow to study complex quantum systems and answer fundamental questions of nature. This is also of vast importance from the applied point of view, with examples...

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Mott Insulator versus Bose glass in nanostructured Josephson junction chains

16 Feb2017

Speaker: Timothy Duty, EQuS - ARC Centre for Engineered Quantum Systems and School of Physics, University of New South Wales

Time: Thursday February 16, 2017 2:00 - 3:00

Location: Hennings 318

The low-temperature states of bosonic condensates exhibit fundamental quantum effects at the macroscopic scale such as supercurrents. The combined effects of interaction and disorder in these can have drastic consequences, leading to the Mott insulator and Bose-Anderson glass. The latter is thought to describe helium-4 in porous media, cold atoms in disordered optical potentials, isordered magnetic insulators, and thin...

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  • Seminar
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Dopants and Charge Carriers in Colloidal Quantum Dots

09 Feb2017

Speaker: Daniel R. Gamelin, Department of Chemistry, University of Washington

Time: Thursday February 9, 2017 2:00 - 3:00

Location: Hennings 318

The physical properties of inorganic crystalline materials can be dramatically transformed by controlled introduction of impurities or other defects, without which most semiconductor technologies including transistors, diodes, and solar cells would not be possible. The development and characterization of high-quality doped inorganic crystals has consequently been a perennial research frontier. This talk will describe some of our group’s recent...

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What can defect bound states tell us? A case study of superconducting LiFeAs

06 Feb2017

Speaker: Shun Chi, Department of Physics & Astronomy, UBC

Time: February 6, 2017 1:00 - 2:00

Location: AMPEL 311

Defect physics is one the driving forces required to understand the mechanism of superconductivity. In conventional s-wave superconductors, only magnetic defects (impurities) exhibit impurity bound states, whereas for a sign-change order parameter they can occur for both magnetic and nonmagnetic defects. Impurity bound states in superconductors can thus provide important insight into the order parameter. Here, I will present...

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Sliced Basis Set Approach to Quantum Chemistry with DMRG

26 Jan2017

Speaker: Miles Stoudenmire, UC Irvine

Time: January 26, 2017 2:00 - 3:00

Location: Hennings 318

Though the density matrix renormalization group (DMRG) is a powerful technique for strongly correlated problems in quantum chemistry, it is not without drawbacks. I will describe a new method for applying DMRG to quasi-1d chemical systems combining a grid approximation of the continuum along one direction with a basis set approximation along the other two directions. Combined with techniques...

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Chiral spin liquids in SU(N) fermionic Mott insulators with artifical gauge fields

20 Jan2017

Speaker: Miklos Lajko, Ecole Polytechnique Federale de Lausanne

Time: January 20, 2017 2:00 - 3:00

Location: Hennings 318

With the recent progress towards achieving SU(N) symmetry with ultracold fermionic atoms [1], the investigation of the effective SU(N) Heisenberg model on various one- and two-dimensional lattices has become a very active field of research. The appearance of chiral phases in these systems was first proposed by Hermele et al. [2] showing that chiral phases may stabilize in a...

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