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21 papers · 1 filter
Quantum Walk in Position Space with Single Optically Trapped Atoms
Michał Karski, Leonid Förster, Jai-Min Choi +4
The quantum walk is the quantum analogue of the well-known random walk, which forms the basis for models and applications in many realms of science. Its properties are markedly dif…
A Note on Quantum Entanglement and PPT
Shao-Ming Fei, Xianqing Li-Jost
We study quantum states for which the PPT criterion is both sufficient and necessary for separability. We present a class of 3x3 bipartite mixed states and show that these states a…
Quantum jumps and spin dynamics of interacting atoms in a strongly coupled atom-cavity system
M. Khudaverdyan, W. Alt, T. Kampschulte +4
We experimentally investigate the spin dynamics of one and two neutral atoms strongly coupled to a high finesse optical cavity. We observe quantum jumps between hyperfine ground st…
Separability of Tripartite Quantum Systems
Ming Li, Shao-Ming Fei, Zhi-Xi Wang
We investigate the separability of arbitrary dimensional tripartite sys- tems. By introducing a new operator related to transformations on the subsystems a necessary condition for…
Nearest-Neighbor Detection of Atoms in a 1D Optical Lattice by Fluorescence Imaging
M. Karski, L. Förster, J. M. Choi +3
We overcome the diffraction limit in fluorescence imaging of neutral atoms in a sparsely filled one-dimensional optical lattice. At a periodicity of 433 nm, we reliably infer the s…
Resonance beating of light stored using atomic spinor polaritons
Leon Karpa, Frank Vewinger, Martin Weitz
We investigate the storage of light in atomic rubidium vapor using a multilevel-tripod scheme. In the system, two collective dark polariton modes exist, forming an effective spinor…