Theory of the phase transition in random unitary circuits with measurements

Y Bao, S Choi, E Altman - Physical Review B, 2020 - APS
We present a theory of the entanglement transition tuned by measurement strength in qudit
chains evolved by random unitary circuits and subject to either weak or random projective …

The weingarten calculus

B Collins, S Matsumoto, J Novak - arxiv preprint arxiv:2109.14890, 2022 - ams.org
Every compact topological group supports a unique translation invariant probability measure
on its Borel sets—the Haar measure. The Haar measure was first constructed for certain …

Monotone Hurwitz numbers and the HCIZ integral

IP Goulden, M Guay-Paquet, J Novak - Annales mathématiques Blaise …, 2014 - numdam.org
In this article, we prove that the complex convergence of the HCIZ free energy is equivalent
to the non-vanishing of the HCIZ integral in a neighbourhood of z= 0. Our approach is based …

Approximate orthogonality of permutation operators, with application to quantum information

AW Harrow - Letters in Mathematical Physics, 2023 - Springer
Consider the n! different unitary matrices that permute nd-dimensional quantum systems. If
d≥ n then they are linearly independent. This paper discusses a sense in which they are …

b-Monotone Hurwitz Numbers: Virasoro Constraints, BKP Hierarchy, and O(N)-BGW Integral

V Bonzom, G Chapuy, M Dołęga - International Mathematics …, 2023 - academic.oup.com
We study a-deformation of monotone Hurwitz numbers, obtained by deforming Schur
functions into Jack symmetric functions. We give an evolution equation for this model and …

Random surfaces and lattice Yang-Mills

S Cao, M Park, S Sheffield - arxiv preprint arxiv:2307.06790, 2023 - arxiv.org
We study Wilson loop expectations in lattice Yang-Mills models with a compact Lie group $
G $. Using tools recently introduced in a companion paper, we provide alternate derivations …

Weingarten calculus

G Köstenberger - arxiv preprint arxiv:2101.00921, 2021 - arxiv.org
We consider the problem of computing the integral $$\int_ {\mathcal {U}(d)} u_ {i_1j_1}\cdots
u_ {i_nj_n}\bar {u} _ {i'_1j'_1}\cdots\bar {u} _ {i'_ {n'} j'_ {n'}} dU, $$ where the integration …

New dual representation for staggered lattice QCD

G Gagliardi, W Unger - Physical Review D, 2020 - APS
We propose a new strategy to evaluate the partition function of lattice QCD with Wilson
gauge action coupled to staggered fermions, based on a strong coupling expansion in the …

Simple maps, Hurwitz numbers, and topological recursion

G Borot, E Garcia-Failde - Communications in Mathematical Physics, 2020 - Springer
We introduce the notion of fully simple maps, which are maps with non self-intersecting
disjoint boundaries. In contrast, maps where such a restriction is not imposed are called …

Jucys–Murphy elements and unitary matrix integrals

S Matsumoto, J Novak - International Mathematics Research …, 2013 - ieeexplore.ieee.org
In this paper, we study the relationship between polynomial integrals on the unitary group
and the conjugacy class expansion of symmetric functions in Jucys–Murphy elements. Our …