Invisibility: Theory & Practice
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Transcript of Invisibility: Theory & Practice
http://timeandquantummechanics.comInvisibility: Theory & Practice - Balticon, May 25th 2013
Invisibility:Theory & Practice
John Ashmead
Monday, June 3, 13
http://timeandquantummechanics.comInvisibility: Theory & Practice - Balticon, May 25th 2013
Invisibility:Theory & Practice
John Ashmead
And catch “Your Lying Eyes” with Stephen
Grande at 5pm!
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Transparent Motives
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Transparent Motives
•Wicked cool
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Transparent Motives
•Wicked cool
•Very practical: not just for war anymore!
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Transparent Motives
•Wicked cool
•Very practical: not just for war anymore!
•And of great scientific value
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Outline
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Outline
•A brief history of invisibility
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Outline
•A brief history of invisibility
•Reflections on materials
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Outline
•A brief history of invisibility
•Reflections on materials
•War, peace & the future
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 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!"
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Sucker Bet
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
The last cry you hear could be “Mimicry”
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
The last cry you hear could be “Mimicry”
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
The last cry you hear could be “Mimicry”
Yellow touches red, you be dead. Red touches black, eat Cracker Jacks.
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
The last cry you hear could be “Mimicry”
Yellow touches red, you be dead. Red touches black, eat Cracker Jacks.
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Spicebush swallowtail
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Spicebush swallowtail
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Camouflage
“The soldiers of France will never abandon their pantaloons rouge!”
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 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.
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Dazzle
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Dazzle
•Ships in WWI & WWII
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Dazzle
•Ships in WWI & WWII
•Confusion to the enemy
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Dazzle
•Ships in WWI & WWII
•Confusion to the enemy
•Moral boost at least
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Dazzle
•Ships in WWI & WWII
•Confusion to the enemy
•Moral boost at least
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Stealth
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Why so Boxy?
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Why so Boxy?
•Reflections angle away from source
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Why so Boxy?
•Reflections angle away from source
•Also, paint eats radar waves
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Why so Boxy?
•Reflections angle away from source
•Also, paint eats radar waves
•But, hard to fly
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 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
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.comMonday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Pay no attention…
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Physics of invisibility
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Physics of invisibility
•Invisibility cloaks
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Physics of invisibility
•Invisibility cloaks
•Negative refractive indexes
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Physics of invisibility
•Invisibility cloaks
•Negative refractive indexes
•Metamaterials
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Physics of invisibility
•Invisibility cloaks
•Negative refractive indexes
•Metamaterials
•Optical transformations
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Physics of invisibility
•Invisibility cloaks
•Negative refractive indexes
•Metamaterials
•Optical transformations
•General relativity helps make it simple?
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Invisibility Cloaks
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Out of mind, out of sight
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Out of mind, out of sight
"Of course: I've been investigating the mystical causes of invisibility when I should have looked at the quantum mechanical!" – Rupert Giles
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Out of mind, out of sight
"Of course: I've been investigating the mystical causes of invisibility when I should have looked at the quantum mechanical!" – Rupert Giles
"I think I speak for everyone here when I say 'huh?'" – Buffy Summers
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Lighten Up!
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Lighten Up!
•Slow light
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Lighten Up!
•Slow light
•Light that goes faster than light
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Lighten Up!
•Slow light
•Light that goes faster than light
•Stopped light - light that doesn’t go at all
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 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
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Cat’s eyes
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Cat’s eyes
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Cat’s eyes
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Fermat’s principle
Direct but slow
Faster
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Fermat’s principle
Direct but slow
Faster
Fastest!
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Simple Lens
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Lüneberg Lens
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
PositiveRefraction
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Negative Refraction
Monday, June 3, 13
http://www.loa.espci.fr/cargese2009/Cargese2009_Pendry.pdfInvisibility: Theory & Practice - Balticon, May 25th 2013
Time Reversal
Monday, June 3, 13
http://www.loa.espci.fr/cargese2009/Cargese2009_Pendry.pdfInvisibility: Theory & Practice - Balticon, May 25th 2013
Negative cancels positive
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Super lens
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.comMonday, June 3, 13
http://www.loa.espci.fr/cargese2009/Cargese2009_Pendry.pdfInvisibility: Theory & Practice - Balticon, May 25th 2013Monday, June 3, 13
http://www.loa.espci.fr/cargese2009/Cargese2009_Pendry.pdfInvisibility: Theory & Practice - Balticon, May 25th 2013Monday, June 3, 13
http://www.loa.espci.fr/cargese2009/Cargese2009_Pendry.pdfInvisibility: Theory & Practice - Balticon, May 25th 2013
Warping space
Monday, June 3, 13
http://www.loa.espci.fr/cargese2009/Cargese2009_Pendry.pdfInvisibility: Theory & Practice - Balticon, May 25th 2013Monday, June 3, 13
http://www.loa.espci.fr/cargese2009/Cargese2009_Pendry.pdfInvisibility: Theory & Practice - Balticon, May 25th 2013
Like water around a rock…
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Hiding a lump under the carpet
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Invisible Tanks
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Invisible Tanks
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Buffy must explain to Willow and Amy that their invisibility spell doesn't work so well with clothes on
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Buffy must explain to Willow and Amy that their invisibility spell doesn't work so well with clothes on
•Traffic light visibility
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Buffy must explain to Willow and Amy that their invisibility spell doesn't work so well with clothes on
•Traffic light visibility
•Earthquakes avoidance
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Buffy must explain to Willow and Amy that their invisibility spell doesn't work so well with clothes on
•Traffic light visibility
•Earthquakes avoidance
•Locating reactor core with muons
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Black holes in the laboratory
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Black holes as lenses
Einstein Rings
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Time Cloak
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Time Cloak
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Seeing the invisible
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Seeing the invisible
•It’s all about the math
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Seeing the invisible
•It’s all about the math
•Brains at play
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Seeing the invisible
•It’s all about the math
•Brains at play
•Any sufficiently advanced science will look like magic
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Be Seeing You
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Be Seeing You•Forbes - Dazzled & Deceived - 2009 [Fun]
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Be Seeing You•Forbes - Dazzled & Deceived - 2009 [Fun]
•Perkowitz - Slow Light: Invisibility, Teleportation, & Other Mysteries of Light - 2011 [Solid]
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 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]
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 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 [Technical]
Monday, June 3, 13
Invisibility: Theory & Practice - Balticon, May 25th 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 [Technical]
Monday, June 3, 13