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CONTACT

Head of the group:

Prof. Dr. Arno Rauschenbeutel
Tel.: +43-1-58801-141761
Fax: +43-1-58801-9141761
Room number: ZB 01 01

TU Wien - Atominstitut
Stadionallee 2
1020 Vienna
Austria

Nanofiber Quantum Networks

A nanofiber guiding 685nm light

In a new project, we plan to establish nanofiber-based atom-light interfaces as quantum-enabled fiber-optical components for quantum information processing and communication. The key ingredient is a nanofiber-based optical dipole trap which stores cold atoms in the evanescent field around the nanofiber [1,2]. In this evanescently coupled atom-waveguide-system, even a few hundred atoms are already optically dense for near-resonant photons propagating through the nanofiber. The first goal of this project is to realize efficient quantum memories which allow one to directly store and retrieve the quantum state of fiber-guided photons. Furthermore, nanofiber-coupled atoms can provide a strong optical non-linearity. The second goal of this project is to explore and to maximize this non-linearity until it prevails down to the single photon level. This would then enable optical quantum switches and photon-photon quantum gates which are essential for implementing deterministic optical quantum computation. The final goal is to interconnect these components in order to demonstrate different quantum network applications, such as highly efficient photon counting, heralded entanglement of two fiber-coupled quantum memories, and a non-linear interaction between two single-photon pulses.

[1] E. Vetsch et al., Phys. Rev. Lett. 104, 203603 (2010)

[2] D. Reitz et al., Phys. Rev. Lett. 110, 243603 (2013)

Team

Senior / Post-Doc

Prof. Arno Rauschenbeutel
Dr. Philipp Schneeweiß
Dr. Jürgen Volz

PhD Students

Adarsh Prasad
Jakob Hinney

Master Students

Sam Rind

From left to right: Jakob Hinney, Adarsh Prasad, Arno Rauschenbeutel, Philipp Schneweiß, Jürgen Volz

Not in picture: Samuel Rind