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Invisibility: Theory and Practice - v2

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Revised version of talk given at Balticon this year (2013). To be delivered tomorrow at FOSSCON.

Revised version of talk given at Balticon this year (2013). To be delivered tomorrow at FOSSCON.

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  • 1. http://timeandquantummechanics.comInvisibility: Theory & Practice - FOSSCON, Aug 10th 2013 Invisibility: Theory & Practice John Ashmead Friday, August 9, 13
  • 2. http://timeandquantummechanics.comInvisibility: Theory & Practice - FOSSCON, Aug 10th 2013 Invisibility: Theory & Practice John Ashmead Newly updated for FOSSCON! Friday, August 9, 13
  • 3. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Transparent Motives Friday, August 9, 13
  • 4. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Transparent Motives •Wicked cool Friday, August 9, 13
  • 5. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Transparent Motives •Wicked cool •Very practical: not just for war anymore! Friday, August 9, 13
  • 6. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Transparent Motives •Wicked cool •Very practical: not just for war anymore! •And of great scientific value Friday, August 9, 13
  • 7. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Outline Friday, August 9, 13
  • 8. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Outline •A brief history of invisibility Friday, August 9, 13
  • 9. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Outline •A brief history of invisibility •Reflections on materials Friday, August 9, 13
  • 10. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Outline •A brief history of invisibility •Reflections on materials •War, peace & the future Friday, August 9, 13
  • 11. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com The Invisible Man “If a sheet of glass is smashed, Kemp, and beaten into a powder, it becomes much more visible while it is in the air; it becomes at last an opaque white powder. This is because the powdering multiplies the surfaces of the glass at which refraction and reflection occur. In the sheet of glass there are only two surfaces; in the powder the light is reflected or refracted by each grain it passes through, and very little gets right through the powder. But if the white powdered glass is put into water, it forthwith vanishes. The powdered glass and water have much the same refractive index; that is, the light undergoes very little refraction or reflection in passing from one to the other.” -- Griffin … “Yes, yes,” said Kemp. “But a man's not powdered glass!” Friday, August 9, 13
  • 12. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Sucker Bet Friday, August 9, 13
  • 13. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com The last cry you hear could be “Mimicry” Friday, August 9, 13
  • 14. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com The last cry you hear could be “Mimicry” Friday, August 9, 13
  • 15. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com The last cry you hear could be “Mimicry” Yellow touches red, you be dead. Red touches black, eat Cracker Jacks. Friday, August 9, 13
  • 16. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com The last cry you hear could be “Mimicry” Yellow touches red, you be dead. Red touches black, eat Cracker Jacks. Friday, August 9, 13
  • 17. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Spicebush swallowtail Friday, August 9, 13
  • 18. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Spicebush swallowtail Friday, August 9, 13
  • 19. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Camouflage “The soldiers of France will never abandon their pantaloons rouge!” Friday, August 9, 13
  • 20. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Camouflage Modern camouflage began in 1915, when, after a crushing defeat by the Germans, the French army abandoned their stylish white gloves and red pantaloons and enlisted a cadre of artists to develop stealthier attire. The U.S. followed suit in 1917. In addition to hand- painted uniforms, these camoufleurs created false bridges, decoy tanks, and, as seen above, paper-mache horse carcasses that snipers used as blinds. Friday, August 9, 13
  • 21. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Dazzle Friday, August 9, 13
  • 22. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Dazzle •Ships in WWI & WWII Friday, August 9, 13
  • 23. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Dazzle •Ships in WWI & WWII •Confusion to the enemy Friday, August 9, 13
  • 24. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Dazzle •Ships in WWI & WWII •Confusion to the enemy •Moral boost at least Friday, August 9, 13
  • 25. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Dazzle •Ships in WWI & WWII •Confusion to the enemy •Moral boost at least Friday, August 9, 13
  • 26. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Stealth Friday, August 9, 13
  • 27. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Why so Boxy? Friday, August 9, 13
  • 28. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Why so Boxy? •Reflections angle away from source Friday, August 9, 13
  • 29. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Why so Boxy? •Reflections angle away from source •Also, paint eats radar waves Friday, August 9, 13
  • 30. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Why so Boxy? •Reflections angle away from source •Also, paint eats radar waves •But, hard to fly Friday, August 9, 13
  • 31. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Why so Boxy? •Reflections angle away from source •Also, paint eats radar waves •But, hard to fly •And, crashes a lot Friday, August 9, 13
  • 32. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Friday, August 9, 13
  • 33. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Pay no attention… Friday, August 9, 13
  • 34. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Physics of invisibility Friday, August 9, 13
  • 35. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Physics of invisibility •Invisibility cloaks Friday, August 9, 13
  • 36. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Physics of invisibility •Invisibility cloaks •Negative refractive indexes Friday, August 9, 13
  • 37. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Physics of invisibility •Invisibility cloaks •Negative refractive indexes •Metamaterials Friday, August 9, 13
  • 38. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Physics of invisibility •Invisibility cloaks •Negative refractive indexes •Metamaterials •Optical transformations Friday, August 9, 13
  • 39. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Physics of invisibility •Invisibility cloaks •Negative refractive indexes •Metamaterials •Optical transformations •General relativity helps make it simple? Friday, August 9, 13
  • 40. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Invisibility Cloaks Friday, August 9, 13
  • 41. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Invisibility in Practice “Invisibility is theoretically possible captain – the selective bending of light – but the power cost is enormous. They may have solved that problem” – Lt. Cmdr. Spock Friday, August 9, 13
  • 42. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Lighten Up! Friday, August 9, 13
  • 43. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Lighten Up! •Slow light Friday, August 9, 13
  • 44. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Lighten Up! •Slow light •Light that goes faster than light Friday, August 9, 13
  • 45. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Lighten Up! •Slow light •Light that goes faster than light •Stopped light - light that doesn’t go at all Friday, August 9, 13
  • 46. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Lighten Up! •Slow light •Light that goes faster than light •Stopped light - light that doesn’t go at all •Backwards light Friday, August 9, 13
  • 47. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Cat’s eyes Friday, August 9, 13
  • 48. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Cat’s eyes Friday, August 9, 13
  • 49. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Cat’s eyes Friday, August 9, 13
  • 50. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Fermat’s principle Direct but slow Faster Friday, August 9, 13
  • 51. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Fermat’s principle Direct but slow Faster Fastest! Friday, August 9, 13
  • 52. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Simple Lens Friday, August 9, 13
  • 53. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Lüneberg Lens Friday, August 9, 13
  • 54. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Positive Refraction Friday, August 9, 13
  • 55. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Negative Refraction Friday, August 9, 13
  • 56. http://www.loa.espci.fr/cargese2009/Cargese2009_Pendry.pdfInvisibility: Theory & Practice - FOSSCON, Aug 10th 2013 Time Reversal Friday, August 9, 13
  • 57. http://www.loa.espci.fr/cargese2009/Cargese2009_Pendry.pdfInvisibility: Theory & Practice - FOSSCON, Aug 10th 2013 Negative cancels positive Friday, August 9, 13
  • 58. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Super lens Friday, August 9, 13
  • 59. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Friday, August 9, 13
  • 60. http://www.loa.espci.fr/cargese2009/Cargese2009_Pendry.pdfInvisibility: Theory & Practice - FOSSCON, Aug 10th 2013 Friday, August 9, 13
  • 61. http://www.loa.espci.fr/cargese2009/Cargese2009_Pendry.pdfInvisibility: Theory & Practice - FOSSCON, Aug 10th 2013 Friday, August 9, 13
  • 62. http://www.loa.espci.fr/cargese2009/Cargese2009_Pendry.pdfInvisibility: Theory & Practice - FOSSCON, Aug 10th 2013 Warping space Friday, August 9, 13
  • 63. http://www.loa.espci.fr/cargese2009/Cargese2009_Pendry.pdfInvisibility: Theory & Practice - FOSSCON, Aug 10th 2013 Friday, August 9, 13
  • 64. http://www.loa.espci.fr/cargese2009/Cargese2009_Pendry.pdfInvisibility: Theory & Practice - FOSSCON, Aug 10th 2013 Like water around a rock… Friday, August 9, 13
  • 65. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Hiding a lump under the carpet Friday, August 9, 13
  • 66. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Invisible Tanks Friday, August 9, 13
  • 67. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Invisible Tanks Friday, August 9, 13
  • 68. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Foreseeable Civilian Uses … Friday, August 9, 13
  • 69. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com •Traffic light visibility Foreseeable Civilian Uses … Friday, August 9, 13
  • 70. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com •Traffic light visibility •Earthquake & tsunami avoidance Foreseeable Civilian Uses … Friday, August 9, 13
  • 71. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com •Traffic light visibility •Earthquake & tsunami avoidance •Locating reactor core with muons Foreseeable Civilian Uses … Friday, August 9, 13
  • 72. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com •Traffic light visibility •Earthquake & tsunami avoidance •Locating reactor core with muons •Tourist revenue enhancement… Foreseeable Civilian Uses … Friday, August 9, 13
  • 73. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Black holes in the laboratory Friday, August 9, 13
  • 74. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Black holes as lenses Einstein Rings Friday, August 9, 13
  • 75. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Time Cloak Friday, August 9, 13
  • 76. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Time Cloak Friday, August 9, 13
  • 77. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com How to Vanish a Cat Friday, August 9, 13
  • 78. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com How to Vanish a Cat The apparatus uses the fact that the human eye can’t see phase information to help route light around the “space between”. With no need to preserve the phase, the design is much simpler! Only works from a few directions, alas. http://arxiv.org/abs/1306.1780 Friday, August 9, 13
  • 79. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Seeing the invisible Friday, August 9, 13
  • 80. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Seeing the invisible •It’s all about the math (really the information!) Friday, August 9, 13
  • 81. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Seeing the invisible •It’s all about the math (really the information!) •Brains at play Friday, August 9, 13
  • 82. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Seeing the invisible •It’s all about the math (really the information!) •Brains at play •Any sufficiently advanced science will look like magic Friday, August 9, 13
  • 83. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Be Seeing You Friday, August 9, 13
  • 84. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Be Seeing You •Forbes - Dazzled & Deceived - 2009 [Fun] Friday, August 9, 13
  • 85. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Be Seeing You •Forbes - Dazzled & Deceived - 2009 [Fun] •Perkowitz - Slow Light: Invisibility, Teleportation, & Other Mysteries of Light - 2011 [Solid] Friday, August 9, 13
  • 86. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Be Seeing You •Forbes - Dazzled & Deceived - 2009 [Fun] •Perkowitz - Slow Light: Invisibility, Teleportation, & Other Mysteries of Light - 2011 [Solid] •Beech - Physics of Invisibility: A Story of Light & Deception - 2011 [Lots of pictures] Friday, August 9, 13
  • 87. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Be Seeing You •Forbes - Dazzled & Deceived - 2009 [Fun] •Perkowitz - Slow Light: Invisibility, Teleportation, & Other Mysteries of Light - 2011 [Solid] •Beech - Physics of Invisibility: A Story of Light & Deception - 2011 [Lots of pictures] •Leonhardt - Geometry & Light: Science of Invisibility - 2010 [Brain-Frier] Friday, August 9, 13
  • 88. Invisibility: Theory & Practice - FOSSCON, Aug 10th, 2013 http://timeandquantummechanics.com Be Seeing You •Forbes - Dazzled & Deceived - 2009 [Fun] •Perkowitz - Slow Light: Invisibility, Teleportation, & Other Mysteries of Light - 2011 [Solid] •Beech - Physics of Invisibility: A Story of Light & Deception - 2011 [Lots of pictures] •Leonhardt - Geometry & Light: Science of Invisibility - 2010 [Brain-Frier] Friday, August 9, 13

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