Events

A photonic link for donor spin qubits in silicon

Stephanie Simmons, Simon Fraser University

Atomically identical donor spin qubits in silicon offer excellent native quantum properties, which match or outperform many qubit rivals. To scale up such systems it would be advantageous to connect silicon donor spin qubits in a cavity-QED architecture. Many proposals in this direction introduce strong electric dipole interactions to the otherwise largely isolated spin qubit ground state in order to couple to superconducting cavities.

Tuesday, August 2, 2016 2:32 pm - 2:32 pm EDT (GMT -04:00)

Seminar: Carlos Perez Delgado

Secure Quantum Computation: Optimality and Beyond

Carlos Perez Delgado, University of Sheffield

When a server performs a quantum computation for a client, the client may insist on various security requirements. One is that the client be able to ascertain the correctness of the computation with high probability. This is called verifiability. A second one is that the server not be able to learn the input, output, or nature of the computation that it itself is performing.

Robust Bell inequalities from communication complexity

Sophie Laplante, Université Paris Diderot

The question of how large Bell inequality violations can be, for quantum distributions, has been the object of much work in the past several years. We say a Bell inequality is normalized if its absolute value does not exceed 1 for any classical (i.e. local) distribution.

Error Models and Error Thresholds

Ken Brown, Georgia Tech

The error threshold for fault-tolerant quantum computation depends
strongly on the error model. Most calculations assume a depolarizing
model, which allows for efficient calculations based on random
applications of Pauli errors. We have been exploring how the
threshold changes for both non-unital and coherent operations. I will

Thursday, August 11, 2016 12:00 pm - 12:00 pm EDT (GMT -04:00)

Special seminar: Vincent Russo

Extended nonlocal games and monogamy-of-entanglement games

Vincent Russo, Institute for Quantum Computing

Two-player one-round games have served to be an instrumental model in theoretical computer science. Likewise, nonlocal games consider this model when the players have access to an entangled quantum state. In this talk, I will consider a broader class of nonlocal games (extended-nonlocal games), where the referee shares an entangled state along with the players.

Friday, August 12, 2016 1:00 pm - 1:00 pm EDT (GMT -04:00)

RAC1 Jounal Club/Seminar Series: USEQIP students

USEQIP student presentations

Dennis Fang

Optimizing Plasmonic Nanoantennas for Emitter Enhancement

Michael Wolfe

Correcting ESR Pulse Sequences for Dynamic Nuclear Polarization

Towards Integrated Photonics for Quantum Computation

Hugo Cable, University of Bristol, UK

I will give an overview of work at the Centre for Quantum Photonics towards implementation of large-scale linear-optical quantum computing (LOQC) using quantum photonics. Our current research addresses the key obstacles to scalable LOQC, namely overcoming nondeterminism, achieving loss tolerance, and manufacturability.

On the geometry of entanglement

Rotem Liss, Technion – Israel Institute of Technology

Entanglement is an important concept in quantum information and computing. In this talk, I present a simple geometrical analysis of all rank-2 quantum mixed states. The analysis is complete for all the bipartite states, and is partial for all the multipartite states.

The Quantum Neutron

Dmitry Pushin

The neutron, one of the most common building blocks of matter, is also a unique probe for studying materials and fundamental interactions. The only electrically-neutral nucleus, the neutron passes through most materials with ease, even at the lowest energies. Nowadays neutrons, even with their ~ 15 minute lifetime, are used to study problems ranging from charging and discharging of common batteries to cosmological dark energy. Here I will focus on the neutron as a quantum particle.

Monday, September 12, 2016 2:30 pm - 2:30 pm EDT (GMT -04:00)

Colloquium: Cheol-Joo Kim

Chiral Atomically Thin Films

Cheol-Joo Kim, Cornell University

Chiral materials possess left- and right-handed counterparts linked by mirror symmetry. These materials are useful for advanced applications in polarization optics[1,2], stereochemistry[3,4] and spintronics[5]. In particular, the realization of spatially uniform chiral films with atomic-scale control of their handedness could provide a powerful means for developing nanodevices with novel chiral properties.

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Seminar: Stephanie Simmons