Qubits that never interact could exhibit past-future entanglement
Updated: 2012-07-30 17:10:01
(Phys.org) -- Typically, for two particles to become entangled, they must first physically interact. Then when the particles are physically separated and still share the same quantum state, they are considered to be entangled. But in a new study, physicists have investigated a new twist on entanglement in which two qubits become entangled with each other even though they never physically interact.
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: Log in Email Password Remember me Your login is case sensitive I have forgotten my password Register now Activate my subscription Institutional login Athens login close My New Scientist Home News In-Depth Articles Blogs Opinion TV Galleries Topic Guides Last Word Subscribe Dating Look for Science Jobs SPACE TECH ENVIRONMENT HEALTH LIFE PHYSICS MATH SCIENCE IN SOCIETY Cookies Privacy Dark matter no-show hobbles elegant particle theory 18:39 19 July 2012 Physics Math Lisa Grossman , reporter Image : Francesco Arneodo LNGS-INFN Dark matter stubbornly refuses to come out of the shadows . The latest results from an underground detector show no sign of WIMPs , or weakly interacting massive particles , the still-theoretical particles thought to make up the invisible majority of the universe's .
The Large Synoptic Survey Telescope just received another boost. The National Science Foundation announced today that it will advance the giant telescope to the final design stage.
SciLogs All Blogs Previous Next 13th Marcel Grossmann Meeting from Marcel S . Pawlowski 02. July 2012, 14:28 We are now on our way to the 13th Marcel Grossmann Meeting in Stockholm . The meeting of physicists and astronomers covers General Relativity , Gravity and relativistic field theories and is held every three years since 1975 in different cities . It is named after Marcel Grossmann who was a Swiss mathematician and a collaborator of Einstein in his work on general relativity . Following his recent review paper The dark matter crisis : falsification of the current standard model of cosmology Pavel has been invited by Davit Merrit to give a talk in the parallel session EG4 : Self-Gravitating System The session will take place tomorrow afternoon Tuesday , 3rd of July at the AlbaNova
: SciLogs All Blogs Next Dark Matter gone missing in many places : a crisis of modern physics from Marcel S . Pawlowski 19. April 2012, 21:41 On The Dark Matter Crisis , we have already presented numerous problems that appear within the LCDM model of cosmology . Some of these have been given names , like the Missing Satellites Problem where LCDM predicts more dark matter subhaloes around the Milky Way than there are observed satellite galaxies , which are expected to trace them . Or the Missing Baryons Problem from cosmological predictions we expect a certain density in the baryonic , luminous and thus in principle observable matter . But when you add up all the visible matter you observed , you only get 10-40 per cent of what you expect . The larger fraction is missing . Even the ongoing