# Events by month

## November 2019

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### Transmitting and Teleporting Quantum-Dot Spin States

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

John Nichol, University of Rochester

### On Optimality of CSS Codes for Transversal T

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

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:

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

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

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.

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

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

Seminar featuring Ghulam Dastgeer, Sejong University

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

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

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.

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

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

Pavel Lougovski, Oak Ridge National Laboratory

### Quantum Transport in topological superconductor hybrid systems

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

Seminar featuring Bhaskaran Muralidharan, Indian Institute of Technology Bombay

### Schrödinger's Class

Friday, November 22, 2019 (all day) to Sunday, November 24, 2019 (all day) to Sat, 11/23/2019 - 19:00

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.

### Fine-grained quantum supremacy

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

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)

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

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

Mete Atature, The University of Cambridge

### November 2019

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