NIST researchers have developed a new protocol that significantly speeds up quantum information transfer and entangled state generation in quantum systems with long-range interactions. This method, which can be exponentially faster than traditional short-range interaction approaches, has potential applications in quantum computing, sensing, and metrology.
The protocol takes advantage of long-range interactions in systems like cold polar molecules, Rydberg atoms, and nitrogen-vacancy defects in diamond. By individually controlling all participating quantum bits and leveraging multiple interaction pathways, the method achieves significant speed-ups in both quantum state transfer and entangled state preparation.
The researchers demonstrated the protocol’s effectiveness by encoding an initial state into a many-body entangled state across a lattice, then decoding it back onto a desired final qubit. This approach, which creates GHZ-like entangled states, has immediate applications in quantum sensing and clock technologies. The team believes the protocol could also be adapted to speed up various quantum computing algorithms and entangled state preparations.
Keywords: Quantum, State, Entangled
