High-Precision Bootstrap of Multimatrix Quantum Mechanics

We consider matrix quantum mechanics with multiple bosonic matrices, including those obtained from dimensional reduction of Yang-Mills theories. Using the matrix bootstrap, we study simple observables like <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"> <a:mrow> <a:mo stretchy="false">⟨</a:mo> <a:mi>tr</a:mi> <a:mtext> </a:mtext> <a:msup> <a:mrow> <a:mi>X</a:mi> </a:mrow> <a:mrow> <a:mn>2</a:mn> </a:mrow> </a:msup> <a:mo stretchy="false">⟩</a:mo> </a:mrow> </a:math> in the confining phase of the theory in the infinite <e:math xmlns:e="http://www.w3.org/1998/Math/MathML" display="inline"> <e:mi>N</e:mi> </e:math> limit. Exploiting the symmetries of these models and applying nonlinear relaxation, we impose constraints that include traces of words of length up to 14. Our results yield rigorous bounds on the large- <g:math xmlns:g="http://www.w3.org/1998/Math/MathML" display="inline"> <g:mi>N</g:mi> </g:math> ground-state dynamics, along with estimates of selected low-order observables to eight significant digits.