531 citations · 1.4k across the 10 of their papers we have counts for
10 papers
Fictitious magnetic field gradients in optical microtraps as an experimental tool for interrogating and manipulating cold atoms
Bernhard Albrecht, Yijian Meng, Christoph Clausen +3
Optical microtraps provide a strong spatial confinement for laser-cooled atoms. They can, e.g., be realized with strongly focused trapping light beams or the optical near fields of…
Directional spontaneous emission and lateral Casimir-Polder force on an atom close to a nanofiber
Stefan Scheel, Stefan Yoshi Buhmann, Christoph Clausen +1
We study the spontaneous emission of an excited atom close to an optical nanofiber and the resulting scattering forces. For a suitably chosen orientation of the atomic dipole, the…
Storage of fiber-guided light in a nanofiber-trapped ensemble of cold atoms
C. Sayrin, C. Clausen, B. Albrecht +2
Tapered optical fibers with a nanofiber waist are versatile tools for interfacing light and matter. In this context, laser-cooled atoms trapped in the evanescent field surrounding…
A source of polarization-entangled photon pairs interfacing quantum memories with telecom photons
Christoph Clausen, Felix Bussieres, Alexey Tiranov +5
We present a source of polarization-entangled photon pairs suitable for the implementation of long-distance quantum communication protocols using quantum memories. Photon pairs wit…
Quantum teleportation from a telecom-wavelength photon to a solid-state quantum memory
Felix Bussieres, Christoph Clausen, Alexey Tiranov +11
In quantum teleportation, the state of a single quantum system is disembodied into classical information and purely quantum correlations, to be later reconstructed onto a second sy…
Analysis of a photon number resolving detector based on an ion Coulomb crystal inside an optical cavity
Christoph Clausen, Nicolas Sangouard, Michael Drewsen
The ability to detect single photons with high efficiency is a crucial requirement for various quantum information applications. By combining the storage process of a quantum memor…
Quantum storage of polarization qubits in birefringent and anisotropically absorbing materials
Christoph Clausen, Felix Bussieres, Mikael Afzelius +1
Storage of quantum information encoded into true single photons is an essential constituent of long-distance quantum communication based on quantum repeaters and of optical quantum…
Heralded quantum entanglement between two crystals
Imam Usmani, Christoph Clausen, Felix Bussieres +3
Quantum networks require the crucial ability to entangle quantum nodes. A prominent example is the quantum repeater which allows overcoming the distance barrier of direct transmiss…
Detector imperfections in photon-pair source characterization
P. Sekatski, N. Sangouard, F. Bussieres +3
We analyze how imperfections in single-photon detectors impact the characterization of photon-pair sources. We perform exact calculations to reveal the effects of multi-pair emissi…
Quantum Storage of Photonic Entanglement in a Crystal
Christoph Clausen, Imam Usmani, Felix Bussieres +4
Entanglement is the fundamental characteristic of quantum physics. Large experimental efforts are devoted to harness entanglement between various physical systems. In particular, e…