Upload
others
View
6
Download
0
Embed Size (px)
Citation preview
Quantum Communication in a Curved Spacetime
By:
B. Nasr
Department of Physics, University of Isfahan
Quantum entanglement• “Spooky action at a distance” Albert Einstein• 1953; Einstein, Podolsky, Rosen introduced the
EPR paradox• The result of a measurement performed on one
part of a quantum system can have an instantaneous effect on the result of a measurement performed on another part, regardless of the distance separating the two parts
• Known as "nonlocal behaviour" or "quantum weirdness"
• Relativistic Quantum Information Theory• Classically:
• In Relativistic QM:
• In a Curved Spacetime:
|σ
,p σ
( ), ;p x xσ
Spin in Curved Spacetime
Spin decoherence around a Schwarzschild black hole
Circular motion:
→
22 2 2 2 2 2 211
( sin )s
s
rr r
r
drds c dt r d dθ θ φ⎛ ⎞⎜ ⎟ ⎛ ⎞⎝ ⎠
⎜ ⎟⎝ ⎠
−−
=− + + +Schwarzschild →
→