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Random number generation is vital for a wide range of applications, including numerical simulation, gambling, and cryptography. However, verifying the randomness of a bit stream generated by a device is exceedingly difficult. Even if a sequence of numbers passes all of the standard statistical tests, it is often impossible to certify the authenticity of the device and rule out the possibility that...
We teleport quantum information between two distant ytterbium ions trapped in different vacuum chambers separated by one meter. Full state tomography shows that the heralded probabilistic process employed has a fidelity of 90%.
Ultrafast laser pulses can be used for fast quantum gates and entangling gates offering an alternative method to scale quantum computing systems. We implement fundamental components of these entangling gates
We observe cavity cooling of a single Rb atom trapped in an intracavity dipole trap. The cavity cooling process avoids atomic excitation and is used to extend the storage time of a single atom
Utilizing cavity cooling in an intracavity dipole trap the normal-mode spectrum of single atoms strongly coupled to a cavity is observed for the first time by both measuring cavity transmission and atomic excitation
Summary form only given. We present many-atom dipole-dipole interaction in an ensemble of ultracold Rb atoms strongly coupled to the standing-wave field of a weakly driven high-finesse optical cavity. The many-atom light force changes the spatial distribution of the atoms, creating an asymmetry in the usually symmetric normal-mode spectrum.
Summary form only given. The strong coupling between an atom and the light field in an optical microresonator causes a single atom to alter the transmission of the cavity significantly, allowing its continuous observation. At the same time, the strong coupling leads to novel optical forces acting on the atom. It was predicted that it should be possible to trap an atom with single intracavity photons.
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