Storage and Retrieval of a Squeezed Vacuum

TL;DR

This paper demonstrates the successful storage and retrieval of a squeezed vacuum state using electromagnetically induced transparency in cold rubidium atoms, showcasing a key step for quantum memory applications.

Contribution

It presents the first experimental demonstration of storing and retrieving a squeezed vacuum with EIT in cold atomic ensembles, advancing quantum information storage techniques.

Findings

930 ns of squeezed vacuum stored and retrieved

Storage duration of 3 microseconds achieved

Confirmed retrieval using time-domain homodyne detection

Abstract

Storage and retrieval of a squeezed vacuum was successfully demonstrated using electromagnetically induced transparency. 930ns of the squeezed vacuum pulse was incident on the laser cooled 87Rb atoms with an intense control light in a coherent state. When the squeezed vacuum pulse was slowed and spatially compressed in the cold atoms, the control light was switched off. After 3us of storage, the control light was switched on again and the squeezed vacuum was retrieved, as was confirmed using the time-domain homodyne method.