quantum memory

Researchers report that a quantum memory has stored single photons for a record length of time, a result being described as a major step toward building a quantum internet. Such memories are needed to link quantum computers and send unbreakable encrypted signals over long distances, since quantum information is normally lost within fractions of a second. The record storage time suggests networking quantum devices is becoming technically feasible.

Researchers have demonstrated a random access quantum memory system in which a single quantum processor can select among seven storage cells, rather than reading stored quantum information sequentially. The result matters for scaling quantum networks and modular quantum computers, where fast, selective retrieval of quantum states is a key engineering hurdle. Details on the research team and the specific physical platform used were not included in the available report.