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Robust quantum metrology with explicit symmetric states
Quantum metrology is a promising practical use case for quantum technologies, where physical quantities can be measured with …
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Randomness for quantum information processing
This thesis is focused on the generation and understanding of particular kinds of quantum randomness. Randomness is useful for many …
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Unitary $t$-designs from $relaxed$ seeds
In this work we reduce the requirements for generating $t$-designs, an important tool for randomisation with applications across …
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Methods for Classically Simulating Noisy Networked Quantum Architectures
As research on building scalable quantum computers advances, it is important to be able to certify their correctness. Due to the …
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On the permanent of Sylvester-Hadamard matrices
We prove a conjecture due to Wanless about the permanent of Hadamard matrices in the particular case of Sylvester-Hadamard matrices. …
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Authenticated teleportation with one-sided trust
We introduce a protocol for authenticated teleportation, which can be proven secure even when the receiver does not trust their …
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Fast Quantum Algorithm for Solving Multivariate Quadratic Equations
In August 2015 the cryptographic world was shaken by a sudden and surprising announcement by the US National Security Agency NSA …
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Random coding for sharing bosonic quantum secrets
We consider a protocol for sharing quantum states using continuous variable systems. Specifically we introduce an encoding procedure …
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Complexity-theoretic limitations on blind delegated quantum computation
Blind delegation protocols allow a client to delegate a computation to a server so that the server learns nothing about the input to …
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Asymptotic security of continuous-variable quantum key distribution with a discrete modulation
We establish a lower bound on the asymptotic secret key rate of continuous-variable quantum key distribution with a discrete modulation …
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