Dynamical creation of bosonic Cooper-like pairs

TL;DR

This paper introduces a method to dynamically generate a metastable paired state of bosonic atoms in an optical lattice, featuring Bell state wavefunctions and large pair sizes akin to Cooper pairs, using a symmetry-supported quantum phase transition.

Contribution

It presents a novel scheme for creating bosonic Cooper-like pairs with a dynamical process crossing a quantum phase transition, characterized by measurable correlators.

Findings

Successful creation of bosonic pairs with Bell state wavefunctions

Pairs span half the lattice size, similar to fermionic Cooper pairs

The final state can be detected via two-particle correlators

Abstract

We propose a scheme to create a metastable state of paired bosonic atoms in an optical lattice. The most salient features of this state are that the wavefunction of each pair is a Bell state and that the pair size spans half the lattice, similar to fermionic Cooper pairs. This mesoscopic state can be created with a dynamical process that involves crossing a quantum phase transition and which is supported by the symmetries of the physical system. We characterize the final state by means of a measurable two-particle correlator that detects both the presence of the pairs and their size.