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Probing and controlling quantum magnetism with ultra-cold atoms

Ana María Rey

Bulletin of the American Physical SocietyMar 12, 20080 citations

Laser Cooling without Repumping: A Magneto-Optical Trap for Erbium Atoms

Jabez J. McClelland, J. Hanssen

We report on a novel mechanism that allows for strong laser cooling of atoms that do not have a closed cycling transition. This mechanism is observed in a magneto-optical trap (MOT) for erbium, an atom with a very complex energy level structure with multiple pathways for optical-pumping losses. We observe surprisingly high trap populations of over 10(6) atoms and densities of over 10(11) atoms cm(-3), despite the many potential loss channels. A model based on recycling of metastable and ground state atoms held in the quadrupole magnetic field of the trap explains the high trap population, and agrees well with time-dependent measurements of MOT fluorescence. The demonstration of trapping of a rare-earth atom such as erbium opens a wide range of new possibilities for practical applications and fundamental studies with cold atoms.We report on a novel mechanism that allows for strong laser cooling of atoms that do not have a closed cycling transition. This mechanism is observed in a magneto-optical trap (MOT) for erbium, an atom with a very complex energy level structure with multiple pathways for optical-pumping losses. We observe surprisingly high trap populations of over 10(6) atoms and densities of over 10(11) atoms cm(-3), despite the many potential loss channels. A model based on recycling of metastable and ground state atoms held in the quadrupole magnetic field of the trap explains the high trap population, and agrees well with time-dependent measurements of MOT fluorescence. The demonstration of trapping of a rare-earth atom such as erbium opens a wide range of new possibilities for practical applications and fundamental studies with cold atoms.

Physical Review LettersApr 14, 2006197 citations

Resonant interaction of trapped cold atoms with a magnetic cantilever tip

Cris Montoya, Jose Valencia, Andrew A. Geraci +4 more

Magnetic resonance in an ensemble of laser-cooled trapped Rb atoms is excited using a microcantilever with a magnetic tip. The cantilever is mounted on a multilayer chip designed to capture, cool, and magnetically transport cold atoms. The coupling is observed by measuring the loss from a magnetic trap as the oscillating cantilever induces Zeeman-state transitions in the atoms. Interfacing cold atoms with mechanical devices could enable probing and manipulating atomic spins with nanometer spatial resolution and single-spin sensitivity, leading to new capabilities in quantum computation, quantum simulation, and precision sensing.Magnetic resonance in an ensemble of laser-cooled trapped Rb atoms is excited using a microcantilever with a magnetic tip. The cantilever is mounted on a multilayer chip designed to capture, cool, and magnetically transport cold atoms. The coupling is observed by measuring the loss from a magnetic trap as the oscillating cantilever induces Zeeman-state transitions in the atoms. Interfacing cold atoms with mechanical devices could enable probing and manipulating atomic spins with nanometer spatial resolution and single-spin sensitivity, leading to new capabilities in quantum computation, quantum simulation, and precision sensing.

arXiv:1503.07825Physical Review AJun 26, 20159 citations

Exploring quantum magnetism at the single spin and atom level

Christian Groß

Bulletin of the American Physical SocietyMar 16, 20170 citations

Production of spin-polarized cold atoms by optical pumping in a magneto-optical trap

Jai Min Choi, Jang Myun Kim, Se Young Jeong +1 more

Journal of the Korean Physical SocietyFeb 1, 20055 citations

Single beam optical trap with an axicon lens

S. Aubin, Steven Christe, Boris Peker +1 more

Summary form only given. Precision optical spectroscopy requires good control over the motion of the atoms to reduce Doppler broadening. It also benefits from long interaction times between the probe radiation and the atoms in a perturbation-free environment. We have implemented an optical trap that captures cold atoms in a region of darkness. Such a set-up is critical for measuring the fundamental interactions of nature through precise spectroscopic studies.

Quantum Electronics and Laser Science ConferenceJan 1, 20000 citations

Probing Quantum Magnetism with Cold Atoms

Abstract

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Probing Quantum Magnetism with Cold Atoms

Abstract

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