Person:
Riedinger, Ralf

Profile Picture

Email Address

AA Acceptance Date

Birth Date

Research Projects

Organizational Units

Job Title

Last Name

Riedinger

First Name

Ralf

Name

Riedinger, Ralf

Filters

20201

Settings

Author's Publications: search.filters.isAuthorOfPublication.326f166e-49a4-4a78-a6e9-5b80c79e0c15

Search Results

Now showing 1 - 1 of 1
  • Thumbnail Image
    Publication
    Experimental Demonstration of Memory-Enhanced Quantum Communication
    (Springer Science and Business Media LLC, 2020-03-23) Bhaskar, Mihir; Riedinger, Ralf; Machielse, Bart; Levonian, David; Nguyen, Christian T; Knall, Erik; Park, Hongkun; Englund, Dirk; Loncar, Marko; Sukachev, Denis; Lukin, Mikhail
    The ability to communicate quantum information over long distances is of central importance in quantum science and engineering. While some applications of quantum communication such as secure quantum key distribution (QKD) are already being successfully deployed, their range is currently limited by photon losses and cannot be extended using straightforward measure-and-repeat strategies without compromising unconditional security. Alternatively, quantum repeaters, which utilize intermediate quantum memory nodes and error correction techniques, can extend the range of quantum channels. However, their implementation remains an outstanding challenge, requiring a combination of efficient and high-fidelity quantum memories, gate operations, and measurements. Here we use a single solid-state spin memory integrated in a nanophotonic diamond resonator to implement asynchronous photonic Bell-state measurements, a key component of quantum repeaters. In a proof-of-principle experiment, we demonstrate high-fidelity operation that effectively enables quantum communication at a rate that surpasses the ideal loss-equivalent direct-transmission method while operating at megahertz clock speeds. These results represent a significant step towards practical quantum repeaters and large-scale quantum networks.