35 citations · 69 across the 9 of their papers we have counts for
12 papers
Characterizing Photonic Partial Distinguishability Through Gram Matrix Tomography
Marcin Kotowski, Marco Robbio, Oliver Reardon-Smith +4
Partial distinguishability affects multiphoton interference, which is central to large-scale photonic experiments such as Boson Sampling and to applications of multiphoton states a…
Exponential lower bounds on the fermionic Gaussian rank of magic states and the bosonic coherent state rank of Fock states
Oliver Reardon-Smith
Recent algorithms for classical simulation of quantum mechanics have runtime whose superpolynomial component is given by a linear dependence on the number of terms required to writ…
Fast classical simulation algorithms for free-fermion dynamics with magic input
Jiwon Heo, Oliver Reardon-Smith, Michał Oszmaniec +2
The classical cost of simulating free-fermion (matchgate) circuits depends on both the input state and the computational task. We develop classical algorithms for circuits with non…
Classical simulation of free-fermionic dynamics and quantum chemistry with magic input
Changhun Oh, Michał Oszmaniec, Oliver Reardon-Smith +1
Establishing the precise computational boundary between classically tractable fermionic systems and those capable of genuine quantum advantage is a central challenge in quantum sim…
ExtraFerm: An Extended Matchgate Simulator
Zack Hassman, Oliver Reardon-Smith, Gokul Subramanian Ravi +2
We present and open source Extraferm, a quantum circuit simulator tailored to chemistry applications. More specifically, our simulator can compute the Born-rule probabilities of sa…
Fundamental solutions of heat equation on unitary groups establish an improved relation between -nets and approximate unitary -designs
Oskar Słowik, Oliver Reardon-Smith, Adam Sawicki
The concepts of -nets and unitary (-approximate) -designs are important and ubiquitous across quantum computation and information. Both notions are closely related and the…
The fermionic linear optical extent is multiplicative for 4 qubit parity eigenstates
Oliver Reardon-Smith
The Fermionic linear optical (FLO) extent is a quantity that serves two roles, firstly it serves as a measure of the "quantumness" (or non-classicality) of quantum circuits. Second…
Improved simulation of quantum circuits dominated by free fermionic operations
Oliver Reardon-Smith, Michał Oszmaniec, Kamil Korzekwa
We present a classical algorithm for simulating universal quantum circuits composed of "free" nearest-neighbour matchgates or equivalently fermionic-linear-optical (FLO) gates, and…
Fast estimation of outcome probabilities for quantum circuits
Hakop Pashayan, Oliver Reardon-Smith, Kamil Korzekwa +1
We present two classical algorithms for the simulation of universal quantum circuits on qubits constructed from instances of Clifford gates and arbitrary-angle -rota…
Simplifying measurement uncertainty with quantum symmetries
Oliver Reardon-Smith
Determining the measurement uncertainty region is a difficult problem for generic sets of observables. For this reason the literature on exact measurement uncertainty regions is fo…
Introduction to UniversalQCompiler
Raban Iten, Oliver Reardon-Smith, Emanuel Malvetti +5
We introduce an open source software package UniversalQCompiler written in Mathematica that allows the decomposition of arbitrary quantum operations into a sequence of single-qubit…
On Quantum Uncertainty Relations and Uncertainty Regions
Paul Busch, Oliver Reardon-Smith
Given two or more non-commuting observables, it is generally not possible to simultaneously assign precise values to each. This quantum mechanical uncertainty principle is widely u…