Projective measurement is used as a fundamental axiom in quantum
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.
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.
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
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.
Optimizing Plasmonic Nanoantennas for Emitter Enhancement
Correcting ESR Pulse Sequences for Dynamic Nuclear Polarization
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.
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 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.