Quantum interface between light and atomic ensembles

By Klemens Hammerer, Anders Søndberg Sørensen, Eugene Simon Polzik. 2008

1,008 citations recorded by the source corpus.

During the past decade the interaction of light with multiatom ensembles has attracted much attention as a basic building block for quantum information processing and quantum state engineering. The field started with the realization that optically thick free space ensembles can be efficiently interfaced with quantum optical fields. By now the atomic ensemble-light interfaces have become a powerful alternative to the cavity-enhanced interaction of light with single atoms. Various mechanisms used for the quantum interface are discussed, including quantum nondemolition or Faraday interaction, quantum measurement and feedback, Raman interaction, photon echo, and electromagnetically induced transparency. This review provides a common theoretical frame for these processes, describes basic experimental techniques and media used for quantum interfaces, and reviews several key experiments on quantum memory for light, quantum entanglement between atomic ensembles and light, and quantum teleportation with atomic ensembles. The two types of quantum measurements which are most important for the interface are discussed: homodyne detection and photon counting. This review concludes with an outlook on the future of atomic ensembles as an enabling technology in quantum information processing.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/91b1b1ae956167b061537b012111f03fdd2171fe

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Artificial Intelligence

In Atomic and Molecular Physics, and Optics

Citations in the corpus

Exponential Improvement in Photon Storage Fidelities Using Subradiance and “Selective Radiance” in Atomic Arrays (2017, background): “It is usually heuristically argued that photon-mediated interactions through these modes are not relevant, particularly for disordered or dilute atomic gases, and the “standard” model within quantum optics is to ignore such terms [1,37,51,87].”
An elementary quantum network of single atoms in optical cavities (2012, background): “[13] Hammerer, K.”
Quantum information with Rydberg atoms (2009, background): “A significant aspect of Rydberg mediated interactions is that they bridge the gap between single atom qubits, with excellent coherence properties, and many atom ensembles, with poorer coherence, yet the potential for establishing a deterministic quantum interface between light and atoms(Hammerer et ”
Cavity QED with atomic mirrors (2012, background): “First, we show that although the single-atom coupling in this system might be relatively weak, there exist collective modes of a trapped atomic ensemble whose coupling to light is enhanced by the square root of the atom number, √ NA [6].”
Quantum matter built from nanoscopic lattices of atoms and photons (2018, methodology): “Thus, weak light pulses interacting with atomic ensembles are usually characterized by linear or Gaussian dynamics (Hammerer, Sørensen, and Polzik, 2010).”