# Composite fermion basis for M-component Bose gases

## TL;DR

This paper extends a composite fermion basis for M-component Bose gases, proving its validity and linking the number of independent states to q-multinomials, aiding understanding of low-energy spectra.

## Contribution

It generalizes a basis for two-component Bose gases to M components and establishes its validity and combinatorial properties.

## Key findings

- Validated the generalized basis for M-component Bose gases.
- Connected the count of independent states to q-multinomials.
- Provided a framework for analyzing low angular momentum states.

## Abstract

The composite fermion (CF) formalism produces wave functions that are not always linearly independent. This is especially so in the low angular momentum regime in the lowest Landau level, where a subclass of CF states, known as simple states, gives a good description of the low energy spectrum. For the two-component Bose gas, explicit bases avoiding the large number of redundant states have been found. We generalize one of these bases to the $M$-component Bose gas and prove its validity. We also show that the numbers of linearly independent simple states for different values of angular momentum are given by coefficients of $q$-multinomials.