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Jac Londe

Squeezed light a small step forward toward detecting gravitational waves - 0 views

  • Gravitational waves are generated by accelerating masses. So, our planet, which is constantly accelerating towards the sun, is sending out a constant stream of gravitational waves. Just really small ones. Likewise, colliding neutron stars will emit a strong burst of gravitational waves. How strong? Well, if the stars were on the other side of our galaxy, a one meter bar on Earth would elongate by about 0.1am (attometer = 10-18m). 
  • orbit of an electron around a hydrogen atom (about 0.05nm),
  • In a light field, the amplitude (a measure of the brightness of the light) and the phase (which controls how to combine light fields) can't both be measured with absolute accuracy—even if you had the perfect measuring device. You can picture the problem as bunches of photons popping into and out of existence, causing the phase and amplitude of the of the light to jitter around. This doesn't add or subtract energy, but it does continuously redistributes the energy along the light beam.
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  • You might think that a photon here or there shouldn't make a difference, but the scaling isn't independent of the laser light entering the interferometer. If you have one photon, you will have a photon of noise. If you have four photons, you will have two photons of noise. The noise increases slower than the signal and the laser power is increased. So, the easiest way to improve the signal to noise ratio is to crank up the power.
Jac Londe

Neural signature of mental time travel | ZME Science - 0 views

  • Neural signature of mental time travel
  • memory triggering
  • “By examining the patterns of brain activity recorded from the implanted electrodes,” Manning said, “we can measure when the brain’s activity is similar to a previously recorded pattern. When a patient recalls a word, their brain activity is similar to when they studied the same word. In addition, the patterns at recall contained traces of other words that were studied prior to the recalled word.” “What seems to be happening is that when patients recall a word, they bring back not only the thoughts associated with the word itself but also remnants of thoughts associated with other words they studied nearby in time,” he said.
Jac Londe

Study finds capitalist network of companies runs the world [with list] | ZME Science - 0 views

  • capitalist ne
  • capitalist network of companies runs the world
  • A recent study conducted by researchers from Zurich found that a ‘super entity’ of 147 companies controls 40% of the entire corporate network.
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  • Here’s a list of 50 of those 147 companies. 1. Barclays plc 2. Capital Group Companies Inc 3. FMR Corporation 4. AXA 5. State Street Corporation 6. JP Morgan Chase & Co 7. Legal & General Group plc 8. Vanguard Group Inc 9. UBS AG 10. Merrill Lynch & Co Inc 11. Wellington Management Co LLP 12. Deutsche Bank AG 13. Franklin Resources Inc 14. Credit Suisse Group 15. Walton Enterprises LLC 16. Bank of New York Mellon Corp 17. Natixis 18. Goldman Sachs Group Inc 19. T Rowe Price Group Inc 20. Legg Mason Inc 21. Morgan Stanley 22. Mitsubishi UFJ Financial Group Inc 23. Northern Trust Corporation 24. Société Générale 25. Bank of America Corporation 26. Lloyds TSB Group plc 27. Invesco plc 28. Allianz SE 29. TIAA 30. Old Mutual Public Limited Company 31. Aviva plc 32. Schroders plc 33. Dodge & Cox 34. Lehman Brothers Holdings Inc* 35. Sun Life Financial Inc 36. Standard Life plc 37. CNCE 38. Nomura Holdings Inc 39. The Depository Trust Company 40. Massachusetts Mutual Life Insurance 41. ING Groep NV 42. Brandes Investment Partners LP 43. Unicredito Italiano SPA 44. Deposit Insurance Corporation of Japan 45. Vereniging Aegon 46. BNP Paribas 47. Affiliated Managers Group Inc 48. Resona Holdings Inc 49. Capital Group International Inc 50. China Petrochemical Group Company
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