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CLASS OF GRAVITONS. "The four other known forces of nature are mediated by elementary particles: electromagnetism by the photon, the strong interaction by the gluons, the Higgs field by the Higgs Boson, and the weak interaction by the W and Z bosons." https://lnkd.in/etiG_Zu View in LinkedIn

LARGER SCALE BEAMS. "Here, we demonstrate the stable transfer of gold-coated hollow glass spheres against the power flow of a single inhomogeneously polarized laser beam over tens of centimetres. Additionally, by varying the polarization state of the beam we can stop the spheres or reverse the direction of their motion at will." (2014). https://lnkd.in/eX6BjcT View in LinkedIn

UNPROVEN GRAVITONS. "In physics, the graviton is a hypothetical elementary particle that mediates the force of gravitation in the framework of quantum field theory. If it exists, the graviton is expected to be massless (because the gravitational force appears to have unlimited range) and must be a spin-2 boson." https://lnkd.in/etiG_Zu View in LinkedIn

SMALL SCALE BEAMS. "Recent advances in lightwave technology have already led to small-scale experimental demonstrations of tractor beams. However, the realization of long-range tractor beams has not gone beyond the realm of theoretical investigations." (2014). https://lnkd.in/eX6BjcT View in LinkedIn

COSMIC GLUE. "Personally I believe the innate property of magnetism in all matter will be proven as the catalyst holding the world together, one way or the other." https://lnkd.in/e32BTSM View in LinkedIn

BREAKTHROUGH. "A University of Dundee-based project to produce the first working acoustic tractor beam has been named one of the Breakthroughs of the Year for 2014 by Physics World, taking a place on the shortlist alongside the landing of the Philae probe onto a comet." https://lnkd.in/eG9zstT View in LinkedIn

MACROSCOPIC TRACTOR BEAM. "We report an experimental acoustic tractor beam generated by an ultrasonic array operating on macroscopic targets (>1 cm)." The most powerful tractor beam to date. (Dundee University, 2014). https://lnkd.in/eCda3-n View in LinkedIn

MACRO BEAM. "They were able to scale the tractor beam up to handle centimeter-size objects, about 6 orders of magnitude larger than those manipulated by previous schemes." https://lnkd.in/eYSRjM2 View in LinkedIn

MACRO BEAM. "Now, a step towards a device that works on macroscopic objects has been demonstrated by a group of researchers led by Michael MacDonald of the University of Dundee." https://lnkd.in/eYSRjM2 View in LinkedIn

FIRST PROTOTYPE TRACTOR BEAM. "But at the microscopic level, an optical tractor beam has indeed been demonstrated: researchers have developed special optical beams that can pull nanoparticles opposite to the propagation direction." (2012). https://lnkd.in/eZUFQuD View in LinkedIn