Robust spatial coherence<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mn>5</mml:mn><mml:mspace width="0.16em" /><mml:mi>μ</mml:mi><mml:mi mathvariant="normal">m</mml:mi></mml:mrow></mml:math>from a room-temperature atom chip

Zhou, Shuyu; Groswasser, David; Keil, Mark; Japha, Yonathan; Folman, R.

doi:10.1103/physreva.93.063615

Cited by 8 publications

(9 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The recent advent of spatial interferometry close to the surface [ 249 ] could enable the measurement of correlation lengths, a topic of considerable interest extending beyond atom optics on atom chips. For example, what is the actual correlation length of Johnson noise?…”

Section: Close Encounters With the Surfacementioning

confidence: 99%

“…Diffraction has been observed for atoms dynamically reflected from close encounters with surfaces [ 236 , 257 ], but the atoms were not trapped by the atom chip potential. Preliminary proof of robust spatial coherence at about from the chip surface was recently provided by experiments with atoms trapped in a magnetic lattice generated by engineered potential corrugations in a chip wire [ 249 ]. In addition to long-lived coherence, these experiments showed a coherence length of , considerably longer than expected if decoherence arises from, for example, Johnson noise, whose correlation length is expected to be about in this experiment.…”

Section: Close Encounters With the Surfacementioning

confidence: 99%

“…Recent realizations of atom interferometers close to the surface [ 307 ] suggest the possibility of sensitive probing with ‘matter-wave homodyning’ (Section 6.2 ). In addition, measuring correlation lengths of different effects may be possible using wavepackets separated parallel to the surface [ 249 ].…”

Section: Close Encounters With the Surfacementioning

confidence: 99%

“…Another example of engineering -scale wires specifically for tunnelling studies is given in [ 171 ]. While the tunnelling experiments envisioned for these chips have not yet been tested with atoms, preliminary proof of spatial coherence from atoms trapped in a modulated potential just a few from the chip has been demonstrated by the Folman group [ 249 ] (Section 4.2 ).…”

Section: Interferometry On An Atom Chipmentioning

confidence: 99%

See 3 more Smart Citations

Fifteen years of cold matter on the atom chip: promise, realizations, and prospects

Keil

Amit

Zhou

et al. 2016

Journal of Modern Optics

Self Cite

127

121

View full text Add to dashboard Cite

Here we review the field of atom chips in the context of Bose–Einstein Condensates (BEC) as well as cold matter in general. Twenty years after the first realization of the BEC and 15 years after the realization of the atom chip, the latter has been found to enable extraordinary feats: from producing BECs at a rate of several per second, through the realization of matter-wave interferometry, and all the way to novel probing of surfaces and new forces. In addition, technological applications are also being intensively pursued. This review will describe these developments and more, including new ideas which have not yet been realized.

show abstract

Section: Close Encounters With the Surfacementioning

confidence: 99%

Section: Close Encounters With the Surfacementioning

confidence: 99%

Section: Close Encounters With the Surfacementioning

confidence: 99%

Section: Interferometry On An Atom Chipmentioning

confidence: 99%

See 2 more Smart Citations

Fifteen years of cold matter on the atom chip: promise, realizations, and prospects

Keil

Amit

Zhou

et al. 2016

Journal of Modern Optics

Self Cite

127

121

View full text Add to dashboard Cite

show abstract

“…To account for these effects and try to quantitatively explain the loss of contrast in the full-loop SGI, we have developed a generalized wave packet model for studying coherence of matter-wave interferometers ( 43 ). While we have simulated our experimental conditions with care, and while these simulations accurately describe our previous interferometry results [e.g., ( 14 – 16 , 44 , 45 )], the coherence drop observed in the full-loop experiment is not well described by the generalized wave packet model ( 43 ), and neither by the HD model. Using the experimental parameters to calculate the visibility, both models predict values that are significantly higher than those observed in the experiment.…”

Section: Resultsmentioning

confidence: 81%

Realization of a complete Stern-Gerlach interferometer: Toward a test of quantum gravity

et al. 2021

Self Cite

View full text Add to dashboard Cite

The Stern-Gerlach effect, found a century ago, has become a paradigm of quantum mechanics. Unexpectedly, until recently, there has been little evidence that the original scheme with freely propagating atoms exposed to gradients from macroscopic magnets is a fully coherent quantum process. Several theoretical studies have explained why a Stern-Gerlach interferometer is a formidable challenge. Here, we provide a detailed account of the realization of a full-loop Stern-Gerlach interferometer for single atoms and use the acquired understanding to show how this setup may be used to realize an interferometer for macroscopic objects doped with a single spin. Such a realization would open the door to a new era of fundamental probes, including the realization of previously inaccessible tests at the interface of quantum mechanics and gravity.

show abstract

Stern-Gerlach Interferometry with the Atom Chip

Keil

Machluf

Margalit

et al. 2021

Molecular Beams in Physics and Chemistry

Self Cite

View full text Add to dashboard Cite

In this invited review in honor of 100 years since the Stern-Gerlach (SG) experiments, we describe a decade of SG interferometry on the atom chip. The SG effect has been a paradigm of quantum mechanics throughout the last century, but there has been surprisingly little evidence that the original scheme, with freely propagating atoms exposed to gradients from macroscopic magnets, is a fully coherent quantum process. Specifically, no full-loop SG interferometer (SGI) has been realized with the scheme as envisioned decades ago. Furthermore, several theoretical studies have explained why it is a formidable challenge. Here we provide a review of our SG experiments over the last decade. We describe several novel configurations such as that giving rise to the first SG spatial interference fringes, and the first full-loop SGI realization. These devices are based on highly accurate magnetic fields, originating from an atom chip, that ensure coherent operation within strict constraints described by previous theoretical analyses. Achieving this high level of control over magnetic gradients is expected to facilitate technological applications such as probing of surfaces and currents, as well as metrology. Fundamental applications include the probing of the foundations of quantum theory, gravity, and the interface of quantum mechanics and gravity. We end with an outlook describing possible future experiments.

show abstract

Robust spatial coherence5μmfrom a room-temperature atom chip

Cited by 8 publications

References 55 publications

Fifteen years of cold matter on the atom chip: promise, realizations, and prospects

Fifteen years of cold matter on the atom chip: promise, realizations, and prospects

Realization of a complete Stern-Gerlach interferometer: Toward a test of quantum gravity

Stern-Gerlach Interferometry with the Atom Chip

Contact Info

Product

Resources

About