# Events - November 2019

Monday, November 25, 2019 — 2:30 PM EST

## Interfacing Spins and Photons in Solids: Old Friends & New

### Mete Atature, The University of Cambridge

Monday, November 25, 2019 — 12:00 PM EST

## Fine-grained quantum supremacy

### Tomoyuki Morimae, Kyoto University

It is known that several sub-universal quantum computing models, such as the IQP model, Boson sampling model, and the one-clean qubit model, cannot be classically simulated unless the polynomial-time hierarchy collapses. However, these results exclude only polynomial-time classical simulations. In this talk, based on fine-grained complexity conjectures, I show more fine-grained" quantum supremacy results that prohibit certain exponential-time classical simulations. (Morimae and Tamaki, arXiv:1901.01637)

Friday, November 22, 2019 (all day) to Sunday, November 24, 2019 (all day)

## Schrödinger's Class

Join us for three days at the Institute for Quantum Computing (IQC) for Schrödinger's Class November 22 – 24, 2019. You will have the opportunity to attend lectures and engage in hands-on activities focused on the integration of quantum technology into the current teaching curriculum. We will discuss quantum information science and technology to give you a deeper understanding of quantum mechanics.

The deadline to apply is Friday, October 4, 2019.

Wednesday, November 20, 2019 — 2:00 PM EST

## Quantum Transport in topological superconductor hybrid systems

### Seminar featuring Bhaskaran Muralidharan, Indian Institute of Technology Bombay

Monday, November 18, 2019 — 2:30 PM EST

## Lattice Gauge Quantum Field Theories in the Age of Quantum Computers

### Pavel Lougovski, Oak Ridge National Laboratory

Wednesday, November 13, 2019 — 2:30 PM EST

## SU(2) gauge theory on digital quantum computers

### Jesse Stryker, The University of Washington

Results from the first digital quantum simulation of an SU(2) gauge theory are presented. This was done by analytically constructing gauge-invariant states and implementing a Trotterized time evolution operator for that basis on superconducting hardware. By using error mitigation techniques, electric energy measurements could be reliably extracted following one Trotter-Suzuki time step. This work is a small but important step toward determining what field-theoretic calculations will be possible using near-term devices.

Tuesday, November 12, 2019 — 9:30 AM EST

## Study of charge current and spin current in van-der Waals 2-dimensional Materials.

### Seminar featuring Ghulam Dastgeer, Sejong University

Wednesday, November 6, 2019 — 2:30 PM EST

## New methods for studying positivity and non-additivity of quantum capacities

### Seminar featuring Vikesh Siddhu

A long standing issue in quantum information theory is to understand the quantum capacity. One main reason for our lack of understanding is the non-additivity of the one-shot quantum capacity. Another reason is the absence of clarity about noisy quantum channels that have positive quantum capacity.

Tuesday, November 5, 2019 — 11:00 AM EST

## On Optimality of CSS Codes for Transversal T

### Narayanan Rengaswamy, Duke University

In order to perform universal fault-tolerant quantum computation, one needs to implement a logical non-Clifford gate. Consequently, it is important to understand codes that implement such gates transversally. In this paper, we adopt an algebraic approach to characterize all stabilizer codes for which transversal T and T^{-1} gates preserve the codespace. Our Heisenberg perspective reduces this question to a finite geometry problem that translates to the design of certain classical codes. We prove three corollaries of this result:

Monday, November 4, 2019 — 2:30 PM EST

## Transmitting and Teleporting Quantum-Dot Spin States

### November 2019

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