We present a novel technique for measuring the characteristics of a magneto-optical trap (MOT) for cold atoms by monitoring the spontaneous emission from trapped atoms coupled into the guided mode of a tapered optical nanofiber. We show that the nanofiber is highly sensitive to very small numbers of atoms close to its surface. The size and shape of the MOT, determined by translating the cold at...

We report the transport of magnetically trapped cold atoms over a large distance. Atoms are captured in a magneto-optical trap ~MOT! and loaded into a magnetic quadrupole trap. The quadrupole potential is then moved over a distance of 33 cm into an ultra-high-vacuum ~UHV! chamber using a chain of quadrupole coils. By running suitable currents through the quadrupole coil pairs the trapping geome...

We present the design, implementation and characterization of a dual-species magneto-optical trap (MOT) for fermionic Li and K atoms with large atom numbers. The MOT simultaneously contains 5.2 × 10 Li-atoms and 8.0 × 10 K-atoms, which are continuously loaded by a Zeeman slower for Li and a 2D-MOT for K. The atom sources induce capture rates of 1.2 × 10 Li-atoms/s and 1.4 × 10 K-atoms/s. Trap l...

We propose an analog-digital quantum simulation of fermion-fermion scattering mediated by a continuum of bosonic modes within a circuit quantum electrodynamics scenario. This quantum technology naturally provides strong coupling of superconducting qubits with a continuum of electromagnetic modes in an open transmission line. In this way, we propose qubits to efficiently simulate fermionic modes...

Relaying can improve performance of a wireless network, especially when different transmission modes with distance/cost tradeoffs are available. Examples of such modes include data rates or transmission power. This paper geometrically analyzes the probability that a high-cost direct transmission can be replaced by a combination of low-cost relay transmissions. The main result of the analysis is...