Zachary Webb of the Department of Physics and Astronomy is defending his thesis:
The computational power of many-body systems
Zak is supervised by Assistant Professor Andrew Childs.
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.
Kent Fisher of the Department of Physics and Astronomy is defending his thesis:
Photons & Phonons: A room-temperature diamond quantum memory
Kent is supervised by Professor Kevin Resch.
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.
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
Projective measurement is used as a fundamental axiom in quantum
Sarah Kaiser of the Department of Physics and Astronomy will be defending her thesis:
Quantum Key Distribution Devices: How to make them and how to break them
Sarah is supervised by Associate Professor Thomas Jennewein.
Tomas Jochym-O'connor of the Department of Physics and Astronomy is defending his thesis:
Novel Methods in Quantum Error Correction
Thomas is supervised by Professor Raymond Laflamme.
In this talk, we explore how quantum information is encoded in tensor networks. To this end, we study the properties of random tensor networks with large bond dimension. We find that, from the perspective of quantum information theory, entanglement emerges from the geometry of the network by a multipartite entanglement distillation process.
I review recent results in quantum thermodynamics. This includes the emergence of many second laws at the micro-scale, fully quantum fluctuation relations for work and for states, a proof of the third law of thermodynamics applicable to erasing a bit of memory, and a grand canonical ensemble for non-commuting conserved quantities. Progress has been made using tools from quantum information theory.