Generation of twin Fock states via transition from a two-component Mott insulator to a superfluid

TL;DR

This paper proposes a method to generate twin Fock states with Heisenberg-limited phase sensitivity by transforming a two-component Mott insulator into a superfluid in an optical lattice, enabling scalable quantum metrology.

Contribution

It introduces a novel dynamical scheme to produce large-scale twin Fock states from a Mott insulator, with a process that is experimentally feasible due to size-independent melting time.

Findings

Transforming a Mott insulator into a superfluid creates long-range multi-particle correlations.

The scheme achieves Heisenberg-limited interferometric phase sensitivity.

Melting time remains constant regardless of system size.

Abstract

We propose the dynamical creation of twin Fock states, which exhibit Heisenberg limited interferometric phase sensitivities, in an optical lattice. In our scheme a two-component Mott insulator with two bosonic atoms per lattice site is melted into a superfluid. This process transforms local correlations between hyperfine states of atom pairs into multi-particle correlations extending over the whole system. The melting time does not scale with the system size which makes our scheme experimentally feasible.