Quantum Interface for Nanomechanics and Atomic Ensembles

Christine A. Muschik, Hanna Krauter, Klemens Hammerer +1 more

Klemens Hammerer, Jacob Friis Sherson, Brian Julsgaard +2 more

Klemens Hammerer, Markus Aspelmeyer, Eugene Simon Polzik +1 more

We suggest interfacing nanomechanical systems via an optical quantum bus to atomic ensembles, for which means of high precision state preparation, manipulation, and measurement are available. This allows, in particular, for a quantum nondemolition Bell measurement, projecting the coupled system, atomic-ensemble-nanomechanical resonator, into an entangled EPR state. The entanglement is observable even for nanoresonators initially well above their ground states and can be utilized for teleportation of states from an atomic ensemble to the mechanical system.

Pritiraj Mohanty

Pierre-Louis Giscard

Margareta Wallquist, Klemens Hammerer, Peter Rabl +2 more

We discuss prospects of building hybrid quantum devices involving elements of atomic and\nmolecular physics, quantum optics and solid-state elements with the attempt to combine\nadvantages of the respective systems in compatible experimental setups. In particular, we summarize our recent work on quantum hybrid devices and briefly discuss recent ideas for quantum networks. These include interfacing of molecular quantum memory with circuit QED, and using nanomechanical elements strongly coupled to qubits represented by electronic spins, as well as single atoms or atomic ensembles.