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34 papers · 1 filter
A note on quantum error correction with continuous variables
Peter van Loock
We demonstrate that continuous-variable quantum error correction based on Gaussian ancilla states and Gaussian operations (for encoding, syndrome extraction, and recovery) can be v…
Creation of a quantum oscillator by classical control
Stefan Danilishin, Helge Müller-Ebhardt, Henning Rehbein +7
As a pure quantum state is being approached via linear feedback, and the occupation number approaches and eventually goes below unity, optimal control becomes crucial. We obtain th…
Nonlinear spectroscopy of photons bound to one atom
I. Schuster, A. Kubanek, A. Fuhrmanek +4
Optical nonlinearities typically require macroscopic media, thereby making their implementation at the quantum level an outstanding challenge. Here we demonstrate a nonlinearity fo…
Recent developments in quantum key distribution: theory and practice
Wolfgang Mauerer, Wolfram Helwig, Christine Silberhorn
Quantum key distribution is among the foremost applications of quantum mechanics, both in terms of fundamental physics and as a technology on the brink of commercial deployment. St…
Cavity cooling of translational and ro-vibrational motion of molecules: ab initio-based simulations for OH and NO
Markus Kowalewski, Giovanna Morigi, Pepijn W. H. Pinkse +1
We present detailed calculations at the basis of our recent proposal for simultaneous cooling the rotational, vibrational and external molecular degrees of freedom. In this method,…
On the distillation and purification of phase-diffused squeezed states
B. Hage, A. Franzen, J. DiGuglielmo +3
Recently it was discovered that non-Gaussian decoherence processes, such as phase-diffusion, can be counteracted by purification and distillation protocols that are solely built on…