# The intermediate evolution phase in case of truncated selection

## TL;DR

This paper uses statistical physics to analyze Eigen's quasispecies theory with a truncated fitness landscape, revealing three distinct phases depending on mutation rates, including an intermediate phase with residual order.

## Contribution

It provides rigorous theoretical calculations for quasispecies evolution with truncated fitness landscapes, extending the understanding of phase transitions in such systems.

## Key findings

- Identification of three phases: selective, intermediate, and randomized.
- Existence of an intermediate phase with residual order.
- Applicability of results to general fitness landscapes.

## Abstract

Using methods of statistical physics, we present rigorous theoretical calculations of Eigen's quasispecies theory with the truncated fitness landscape which dramatically limits the available sequence space of a reproducing quasispecies. Depending on the mutation rates, we observe three phases, a selective one, an intermediate one with some residual order and a completely randomized phase. Our results are applicable for the general case of fitness landscape.