ELI5: Explain Like I'm 5

Hamiltonian lattice gauge theory

Okay kiddo, let me explain Hamiltonian lattice gauge theory to you.

First, let's start with what a lattice is. Think of a lattice as a grid made up of points. Each point is called a lattice site, and they are connected by lines that we call bonds. A lattice can be 1-dimensional (like a line), 2-dimensional (like a square), or 3-dimensional (like a cube).

Now, let's talk about gauge theory. In physics, gauge theory is a way to describe how particles interact with each other. We use something called a gauge field to describe these interactions. You can think of a gauge field like a map that shows you the direction and strength of the interaction between particles at each point in space.

Hamiltonian lattice gauge theory is a specific way of studying gauge theory on a lattice. The Hamiltonian is a mathematical formula that tells us how the system (in this case, the gauge field on the lattice) changes over time. In Hamiltonian lattice gauge theory, we use the Hamiltonian to simulate the system and see how it evolves over time.

So, to sum it up: Hamiltonian lattice gauge theory is a way to study how particles interact with each other using a map called a gauge field on a lattice. We use the Hamiltonian to simulate the system and see how it evolves over time.