62 research outputs found
Sensitivity of Ultracold Atoms to Quantized Flux in a Superconducting Ring
We report on the magnetic trapping of an ultracold ensemble of Rb
atoms close to a superconducting ring prepared in different states of quantized
magnetic flux. The niobium ring of 10 m radius is prepared in a flux state
, with the flux quantum and varies between . An atomic cloud of 250 nK temperature is positioned with a harmonic
magnetic trapping potential at m distance below the ring. The
inhomogeneous magnetic field of the supercurrent in the ring contributes to the
magnetic trapping potential of the cloud. The induced deformation of the
magnetic trap impacts the shape of the cloud, the number of trapped atoms as
well as the center-of-mass oscillation frequency of Bose-Einstein condensates.
When the field applied during cooldown of the chip is varied, the change of
these properties shows discrete steps that quantitatively match flux
quantization.Comment: 5 pages, 4 figure
Sensitivity of Ultracold Atoms to Quantized Flux in a Superconducting Ring
We report on the magnetic trapping of an ultracold ensemble of Rb
atoms close to a superconducting ring prepared in different states of quantized
magnetic flux. The niobium ring of 10 m radius is prepared in a flux state
, with the flux quantum and varies between . An atomic cloud of 250 nK temperature is positioned with a harmonic
magnetic trapping potential at m distance below the ring. The
inhomogeneous magnetic field of the supercurrent in the ring contributes to the
magnetic trapping potential of the cloud. The induced deformation of the
magnetic trap impacts the shape of the cloud, the number of trapped atoms as
well as the center-of-mass oscillation frequency of Bose-Einstein condensates.
When the field applied during cooldown of the chip is varied, the change of
these properties shows discrete steps that quantitatively match flux
quantization.Comment: 5 pages, 4 figure
Anatomia chirurgicala a arterei radiale si a arcadelor palmare cu implicatii in cirurgia coronariana
Coupling ultracold atoms to a superconducting coplanar waveguide resonator
Ensembles of trapped atoms interacting with on-chip microwave resonators are considered as promising systems for the realization of quantum memories, novel quantum gates, and interfaces between the microwave and optical regime. Here, we demonstrate coupling of magnetically trapped ultracold Rb ground-state atoms to a coherently driven superconducting coplanar resonator on an integrated atom chip. When the cavity is driven off-resonance from the atomic transition, the microwave field strength in the cavity can be measured through observation of the AC shift of the atomic hyperfine transition frequency. When driving the cavity in resonance with the atoms, we observe Rabi oscillations between hyperfine states, demonstrating coherent control of the atomic states through the cavity field. These observations enable the preparation of coherent atomic superposition states, which are required for the implementation of an atomic quantum memory.QN/Steele La
Investigation of abiogenic stress-induced alterations in the level of secondary metabolites in poppy plants ( Papaver somniferum
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