487 citations · 2.3k across the 20 of their papers we have counts for
20 papers
Measurement and simulation of atomic motion in nanoscale optical trapping potentials
Signe B. Markussen, Jürgen Appel, Christoffer Østfeldt +3
Atoms trapped in the evanescent field around a nanofiber experience strong coupling to the light guided in the fiber mode. However, due to the intrinsically strong positional depen…
Entanglement between Distant Macroscopic Mechanical and Spin Systems
Rodrigo A. Thomas, Michał Parniak, Christoffer Østfeldt +7
Entanglement is a vital property of multipartite quantum systems, characterised by the inseparability of quantum states of objects regardless of their spatial separation. Generatio…
Dipole force free optical control and cooling of nanofiber trapped atoms
Christoffer Østfeldt, Jean-Baptiste Béguin, Freja T. Pedersen +3
The evanescent field surrounding nano-scale optical waveguides offers an efficient interface between light and mesoscopic ensembles of neutral atoms. However, the thermal motion of…
Observation of quantum spin noise in a 1D light-atoms quantum interface
J. -B. Béguin, J. H. Müller, J. Appel +1
We observe collective quantum spin states of an ensemble of atoms in a one-dimensional light-atom interface. Strings of hundreds of cesium atoms trapped in the evanescent fiel of a…
Multi-partite entanglement detection with non symmetric probing
Luca Dellantonio, Sumanta Das, Jürgen Appel +1
We show that spin squeezing criteria commonly used for entanglement detection can be erroneous, if the probe is not symmetric. We then derive a lower bound on squeezing for separab…
Coherent backscattering of light off one-dimensional atomic strings
H. L. Sørensen, J. -B. Béguin, K. W. Kluge +5
We present the first experimental realization of coherent Bragg scattering off a one-dimensional (1D) system -- two strings of atoms strongly coupled to a single photonic mode -- r…