Generation of Total Angular Momentum Eigenstates in Remote Qubits

Abstract

We propose a scheme enabling the universal coupling of angular momentum of $N$ remote noninteracting qubits using linear optical tools only. Our system consists of $N$ single-photon emitters in a $\Lambda$-configuration that are entangled among their long-lived ground-state qubits through suitably designed measurements of the emitted photons. In this manner, we present an experimentally feasible algorithm that is able to generate any of the $2^N$ symmetric and nonsymmetric total angular momentum eigenstates spanning the Hilbert space of the $N$-qubit compound.

5 pages, 4 figures, improved presentation. Accepted in Physical Review A

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• Hyperradiance from collective behavior of coherently driven atoms
• Directional Dicke Subradiance with Nonclassical and Classical Light Sources
• Limits to multipartite entanglement generation with bosons and fermions
• A versatile source of polarization-entangled photons
• Simulating the coupling of angular momenta in distant matter qubits
• Radiation trapping effect versus superradiance in quantum simulation of light-matter interaction