iiinova — where your digital self keeps evolving

Ryan Mann @ryanlmann.bsky.social · 21/08/2026

I'm pleased to have finished this paper on fast algorithms for stoquastic spin systems at high temperature. The algorithms run in expected near-linear time for sampling in the spin basis and near-quadratic time for counting. arxiv.org/abs/2608.19489

000 0

Ryan Mann @ryanlmann.bsky.social · 14/07/2026

I'm pleased to share that my note with Gabe Waite on efficient algorithms for weakly-interacting quantum spin systems at arbitrary temperature has now been published in PRA. arxiv.org/abs/2601.21140

010 0

Ryan Mann @ryanlmann.bsky.social · 30/01/2026

I'm pleased to have finished this simple note with Gabe Waite on efficient algorithms for weakly-interacting quantum spin systems at arbitrary temperature. scift.app/arxiv/paper/...

011 0

Ryan Mann @ryanlmann.bsky.social · 12/12/2025

I'm please to have finished this paper on approximate counting in local lemma regimes with Gabe Waite arxiv.org/abs/2512.10134

110 0

Ryan Mann @ryanlmann.bsky.social · 01/07/2025

I'm excited to share that my new website, Scift (www.scift.app), is now live! Scift is a simple way to explore scientific preprints from across all areas of science — no ratings, no comments, just the papers to read and consider on your own terms.

230 0

Ryan Mann @ryanlmann.bsky.social · 23/04/2025

I'm pleased that our paper on a graph-theoretic framework for free-parafermion solvability has been published in RSPA. We prove that if the frustration graph of a spin system is an oriented indifference graph, then it has an exact free-parafermion solution. royalsocietypublishing.org/doi/10.1098/...

050 0

Ryan Mann @ryanlmann.bsky.social · 21/02/2025

Gabe Waite (@quantumbeef_) of the Hamiltonian Jungle has uploaded his first first-author paper: "The Complexity of Local Stoquastic Hamiltonians on 2D Lattices". Read here: arxiv.org/pdf/2502.14244

000 0

Ryan Mann @ryanlmann.bsky.social · 28/01/2025

I'm pleased that our work on the optimal scheduling of graph states via path decompositions has been published in Physical Review A. journals.aps.org/pra/abstract/10.11…

000 0

Ryan Mann @ryanlmann.bsky.social · 20/08/2024

New paper with Samuel Elman, David Wood, and Adrian Chapman! We provide a graph-theoretic characterisation of when a quantum spin system can be solved via a mapping to free parafermions. arxiv.org/pdf/2408.09684

000 0

Ryan Mann @ryanlmann.bsky.social · 19/04/2024

The Hamiltonian Jungle has expanded! In our latest update we unravel the secrets of Cluster Expansions, C*-Algebras, and MCMC. We also explore the complexities of Stoquastic Hamiltonians and Partition Functions. Explore the jungle at

000 0

Ryan Mann @ryanlmann.bsky.social · 08/03/2024

On the arXiv today, Sam, Jason, and me, Posted some trivial results on MBQC. arxiv.org/abs/2403.04126

000 0

Ryan Mann @ryanlmann.bsky.social · 16/01/2024

The Hamiltonian Jungle is now alive! Inspired by the legacy of the Complexity Zoo, Quantum Algorithm Zoo, and Error Correction Zoo, this new website categorises the complexities of local Hamiltonian problems. Explore the jungle at

100 0

Ryan Mann @ryanlmann.bsky.social · 06/12/2023

I'm delighted that our paper on algorithmic cluster expansions for quantum problems, authored with @rminkomaths, has been accepted for publication in PRX Quantum. journals.aps.org/prxquantum/accepte… arxiv.org/abs/2306.08974

000 0

Ryan Mann @ryanlmann.bsky.social · 25/10/2023

I'm pleased that Tyler Helmuth's and my paper has been published in @quantumjournal! quantum-journal.org/papers/q-2023-1…

000 0

Ryan Mann @ryanlmann.bsky.social · 16/06/2023

I'm excited to have finished this paper on algorithmic cluster expansions for quantum problems with @rminkomaths . arxiv.org/abs/2306.08974

100 0

Ryan Mann @ryanlmann.bsky.social · 26/05/2023

I’m pleased to have completed this note on free-fermion solvability with Adrian Chapman and Sam Elman. arxiv.org/abs/2305.15625

010 0

Ryan Mann @ryanlmann.bsky.social · 16/03/2022

I'm glad to have created this horcrux with @mickbremner, @jizhengfeng, @Mauromsoler, @varno91, and Luke Mathieson. arxiv.org/abs/2203.08002

000 0

Ryan Mann @ryanlmann.bsky.social · 19/01/2022

New paper with Tyler Helmuth: Efficient Algorithms for Approximating Quantum Partition Functions at Low Temperature arxiv.org/abs/2201.06533

000 0

Ryan Mann @ryanlmann.bsky.social · 24/09/2021

I'm excited that our paper on simulating quantum computations with Tutte polynomials was published in npj Quantum Information today. www.nature.com/articles/s41534-021-…

000 0

Ryan Mann @ryanlmann.bsky.social · 01/02/2021

I'm pleased that Tyler Helmuth and my paper on efficient algorithms for approximating quantum partition functions was published in the Journal of Mathematical Physics today. doi.org/10.1063/5.0013689

000 0

Ryan Mann @ryanlmann.bsky.social · 05/01/2021

New paper: "Simulating Quantum Computations with Tutte Polynomials". Nothing too exciting, but I'm glad to have finally finished it --- scirate.com/arxiv/2101.00211

000 0

Ryan Mann @ryanlmann.bsky.social · 27/04/2020

New paper with Tyler Helmuth: "Efficient Algorithms for Approximating Quantum Partition Functions" --- scirate.com/arxiv/2004.11568

100 0

Ryan Mann @ryanlmann.bsky.social · 22/04/2020

New paper with Luke Mathieson and Catherine Greenhill --- "On the Parameterised Complexity of Induced Multipartite Graph Parameters" --- arxiv.org/abs/2004.09938

000 0

Ryan Mann @ryanlmann.bsky.social · 03/02/2020

Enumerational --- Found in Graph Theory and Theoretical Physics (1967).

000 0

Ryan Mann @ryanlmann.bsky.social · 02/07/2019

Summary of isomorphism problems --- Figure 2 of arxiv.org/abs/1907.00309v1 @UTS_QSI

000 0

Ryan Mann @ryanlmann.bsky.social · 02/05/2019

30 years of the greatest album ever made.

000 0

Ryan Mann @ryanlmann.bsky.social · 11/01/2019

Michael Atiyah has passed away - It's a sad day for mathematics . royalsociety.org/news/2019/01/tribu…

000 0

Ryan Mann @ryanlmann.bsky.social · 30/11/2018

The NIST Digital Library of Mathematical Functions is awesome. dlmf.nist.gov

000 0

Ryan Mann @ryanlmann.bsky.social · 24/10/2018

A tribute to William Tutte at the University of Waterloo.

000 0

Ryan Mann @ryanlmann.bsky.social · 04/09/2018

Great introduction on the complexity of approximate counting by Leslie Goldberg. www.youtube.com/watch?v=i6r9WgW0U3Q

000 0

Ryan Mann @ryanlmann.bsky.social · 02/07/2018

New paper with @mickbremner --- "Approximation Algorithms for Complex-Valued Ising Models on Bounded Degree Graphs" --- scirate.com/arxiv/1806.11282

100 0

Ryan Mann @ryanlmann.bsky.social · 17/03/2018

Nice article by Boaz Barak on Statistical Physics and Computer Science. windowsontheory.org/2018/03/14/stat…

000 0

Ryan Mann @ryanlmann.bsky.social · 03/11/2017

New paper with @mickbremner --- "On the Complexity of Random Quantum Computations and the Jones Polynomial" --- scirate.com/arxiv/1711.00686

000 0

Ryan Mann @ryanlmann.bsky.social · 01/08/2017

Refutation of the CSP Dichotomy Conjecture. arxiv.org/abs/1707.09440

000 0

Ryan Mann @ryanlmann.bsky.social · 28/07/2017

Like 62F15? They've done a good job listing them all. x.com/csferrie/status/8907724341855…

000 0

Ryan Mann @ryanlmann.bsky.social · 28/07/2017

The AMS Mathematics Subject Classification is epic. www.ams.org/mathscinet/msc/pdfs/cla…

000 0

Ryan Mann @ryanlmann.bsky.social · 31/05/2017

This book has a really nice description of spherical t-designs (pages 76-83). arxiv.org/ftp/arxiv/papers/1705/170…

000 0

Ryan Mann @ryanlmann.bsky.social · 25/05/2017

After 9 days my laptop has decided that 2^46435159-1 is not a prime.

000 0

Ryan Mann @ryanlmann.bsky.social · 27/04/2017

Online Evolution Simulator - coolest thing I've seen this year (code in comments). www.youtube.com/watch?v=GOFws_hhZs8

000 0

Ryan Mann @ryanlmann.bsky.social · 08/03/2017

From discrete analysis to continuous analysis with ultraproducts --- An interesting talk by Terry Tao www.youtube.com/watch?v=IS9fsr3yGLE

010 0

Ryan Mann @ryanlmann.bsky.social · 26/01/2017

If you haven't checkout @AtomEditor, then you definitely should. It's open source and perfect for LaTeX. atom.io

000 0

Ryan Mann @ryanlmann.bsky.social · 26/01/2017

This chess puzzle is quite neat if instead black plays Ka1 or Kc1. www.chess.com/forum/view/daily-puzz…

000 0