May 2022

May 31 2022

10:00 am - 11:00 am

#### Self-mitigating Trotter circuits for SU(2) lattice gauge theory on a quantum computer

Sarah Powell, York University.
Calculations within SU(2) pure gauge theory are able to show the motion of an excitation traveling across a spatial lattice in real time. This is accomplished by using a simple yet powerful method for error mitigation, where the original circuit is used both forward and backward in time. For a two-plaquette lattice, meaningful results are obtained from a circuit containing hundreds of CNOT gates. The same method is used for a five-plaquette lattice, where calculations show that residual systematic effects can be reduced through follow-up mitigation.

B143 Physics and Astronomy Building

May 23 2022

11:30 am - 12:30 pm

#### Every Quantum Helps

Gerardo Adesso, University of Nottingham

B143 Physics and Astronomy Building

April 2022

Apr 28 2022

9:00 am - 10:00 am

#### Hardware-efficient quantum simulation of non-abelian gauge theories with qudits on Rydberg platforms

Torsten Zache, IQOQI & Center for Quantum Physics, University of Innsbruck

C520 Physics and Astronomy Building

Apr 11 2022

11:30 am - 12:30 pm

#### Deconfined Z_2 gauge theory in Rydberg atom arrays

Subir Sachdev, Harvard University.
Pumped Rydberg atoms trapped in arrays of optical tweezers realize systems of individually controllable qubits with strong interactions.
I will describe recent theory and experiments on Z_2 spin liquids, which are deconfined phases of Z_2 gauge theory in 2+1 dimensions.

C520 Physics and Astronomy Building

December 2021

Dec 13 2021

2:30 pm - 3:30 pm

#### Designer Hamiltonians for Dark Matter and Quantum Materials

Sinéad M. Griffin, Materials Science Division and Molecular Foundry, Berkeley Lab

November 2021

Nov 29 2021

2:30 pm - 3:30 pm

#### Simulating quantum field theories on quantum computers

Simulating quantum field theories on quantum computers, by Stephen Jordan, Microsoft.

Nov 22 2021

2:30 pm - 3:30 pm

#### First impressions of lattice gauge theory on a quantum annealer

First impressions of lattice gauge theory on a quantum annealer, by Randy Lewis, York University.

Cyber Space

Nov 01 2021

2:30 pm - 3:30 pm

#### Downfolding coupled-cluster formulations: hybrid quantum-classical computing perspective

Downfolding coupled-cluster formulations: hybrid quantum-classical computing perspective, by Karol Kowalski, Pacific Northwest National Laboratory (PNNL).

Cyber Space

October 2021

Oct 25 2021

2:30 pm - 3:30 pm

#### Analog Quantum Simulation of Topological Lattice Models with a Parametric Cavity

Analog Quantum Simulation of Topological Lattice Models with a Parametric Cavity, by Chris Wilson, IQC, University of Waterloo

Oct 04 2021

2:30 pm - 3:30 pm

#### Physical Simulation Through a Quantum Computational Lens

Jarrod McClean, Google
As quantum technology rapidly advances, a premier application of interest is the simulation of physical, chemical, and material systems to improve the pathway towards novel design. However, even before large, fault-tolerant devices are available, the study of quantum computer science can shape our perspective on the natural world. In this talk, we will first review some of the techniques that make quantum computers especially promising for the simulation of chemical and material systems. From there, we explore what we have learned about the limits of even quantum computing methods, and their relationship with collecting data from nature. In particular, we'll cover recent results on the ways in which data can elevate classical learning models beyond conventional classical computation when samples from a quantum computer are provided. We'll use this to shape an outlook for the future relationship between quantum computing, chemistry, and materials science.

Cyber Space

April 2021

March 2021

Mar 29 2021

3:00 pm

#### Challenges and Opportunities in Quantum Simulation

Kenneth Brown, Duke University

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