Abstract: We propose a dissipative stabilization scheme for entangled states between many spin ensembles in a reconfigurable driven-dissipative setup. Starting from the so-called cooperative resonance fluorescence (CRF) model with competitions between coherent drive and superradiant emission in a single spin ensemble, we split the spin ensemble into many identical sub-ensembles, and break the permutation symmetry by assigning different detunings to each sub-ensemble and/or adding chiral spin-exchange couplings between sub-ensembles. We show that our scheme can lead to an exactly solvable pure steady state with tunable multipartite entanglement between spin ensembles, which provides immediate applications such as quantum multi-ensemble sensing and dissipative engineering of exotic quantum states. For two spin ensembles, we demonstrate quantum enhancement of differential phase sensing with Heisenberg scaling, even in the presence of large common phase noise. For four spin ensembles, our scheme provides flexible tunability of quantum enhancement for different observables including curvature measurement, which is robust against various types of phase noise. For a 1D spin chain, our scheme can lead to dissipative engineering of a series of matrix product states smoothly connecting spin-1/2 dimer and spin-1 Affleck–Kennedy–Lieb–Tasaki (AKLT) states. Our scheme can be implemented in various experimental platforms such as cavity QED systems and distributed quantum networks.
a joint institute of 
and 
and