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 | comment listing type: Top Sift for Nov 5th, 2009Friends O' the Sift Top New Science Videos by Vote  Subscribe Top 15 Science Sifters of All Time Top 15 Science Sifters of the Past Week Newest Appreciated Comments         |
Girl Gang-Raped At Homecoming Bystanders Watch No One Helps
Philosophy (Blog Entry by laura)
The theory: Going from here to somewhere else without passing through anywhere in between.
The science fiction: Beam me up, Scotty.
In practice: Take two particles of light and entangle them - now you can teleport quantum information - such as what their spin is - from one to the other, instantaneously.
The layman's explanation: Photons, particles of light, have a property called "spin". This can be up, down, or a mixture of the two. Alice has a photon, and she wants Bob to have one with the same spin. She can't send him hers because the Post Office is on strike, and she can't measure her spin and phone him, because the measurement can change the spin.
Fortunately, the last time she met Bob she gave him one photon from an entangled pair, and kept the other. "Entangled" means that the two photons were prepared so that their states were related in a special way. Alice lets her photon interact with her other photon from the entangled pair. This instantly teleports information about the spin to Bob's half. However, he can't "read" that information until a message arrives by more conventional means. A quick call on Alice's mobile, telling him some measurements she has made, now puts his entangled photon into the desired state.
Quantum "teleportation" destroys the original state and can't be used to send messages faster than light. It doesn't actually teleport matter - just quantum information.
Coming to a store near you?: In 1998, the quantum optics group at Caltech used "squeezed light" to teleport the state of a photon in a laboratory. It's now been done with atoms, too. In 2004 Austrian physicists teleported the state of a photon across the Danube river. Within another century it will be an amoeba. But be warned: when you are teleported, your body will be ripped to shreds and rebuilt at the other end.
Philosophy (Blog Entry by laura)
I just stepped into the box and now I'm stepping out. WHAT? I'm still on Alpha Centurai. I ask the operator: "What happened?" The Box operator says, "Don't worry, we are having a small problem with the eraser. You are already on Earth. You will dissolve here in about five seconds!"
--- This is the question of consciousness. If there is no break in stream of consciousness and consciousness continues to flow, could the person be considered to have experienced death? ---
The Arrogance of Clergy (Awesome rant)
Franco Battiato - Ruby Tuesday
Cat Climbs Girl, Seems Comfortable
NordlichReiter
Someone will find a way to subvert this mechanism, and then the security designers will find a way to patch it. So on and so forth. Its not so much a slippery slope argument as a futile effort to avert crisis. Which only adds to the stupidity of it all.
Now we get lead lined cod pieces.
Get your own medical RFID MICROCHIP implanted today!
Ego: Our Greatest Enemy