5 papers
Classical simulation of free-fermionic dynamics and quantum chemistry with magic input
Changhun Oh, MichaÅ 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 SÅowik, 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 t…
Improved simulation of quantum circuits dominated by free fermionic operations
Oliver Reardon-Smith, MichaÅ 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…
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…