Long-range entangled quantum states are a key part of realizing the full potential of quantum computing technology; they provide the foundation for error correction, enable universal quantum computation, and enhance quantum algorithms and metrology, but they cannot currently be prepared by any scalable process.

The Vishwanath lab at Harvard has developed a method to efficiently create a variety of highly sought after long-range entangled states, with ideal implementation in Rydberg atom arrays. This protocol simply involves: initialization of qubits, unitary time-evolution under Ising interactions, and measurement of a subset of qubits, which can be realized on existing experimental platforms. Further, the researchers have developed an approach where various long-range entangled states can be prepared in multiple existing platforms, beyond Rydberg atom arrays.