# The 39th International Symposium on Lattice Field Theory (Lattice 2022)

Aug 8 – 13, 2022
Hörsaalzentrum Poppelsdorf
Europe/Berlin timezone

## Strategies for the Determination of the Running Coupling of $(2+1)$-dimensional QED with Quantum Computing (I): Motivations and Theoretical Foundations

Not scheduled
20m
CP1-HSZ/1st-1.004 - HS7 (CP1-HSZ)

### CP1-HSZ/1st-1.004 - HS7

#### CP1-HSZ

70
Oral Presentation

### Speaker

Karl Jansen (DESY)

### Description

Quantum computations are presently restricted to only a small number of qubits. At the example of 2+1 dimensional QED
we will describe how this fact can still be utilized by quantum computing (QC) small distance quantities such as the running
coupling in regimes that are difficult to reach for classical Markov Chain Monte Carlo (MCMC) calculations. By matching results for, e.g., the mass gap from QC and MCMC simulations at intermediate coupling values it becomes possible to obtain the physical value of the lattice spacing and hence the physical renormalization scale. This would allow eventually to compute the important Lambda paramter.

### Primary author

Karl Jansen (DESY)

### Presentation materials

There are no materials yet.