Quantum Communication in a Curved Spacetime
Transcript of Quantum Communication in a Curved Spacetime
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Quantum Communication in a Curved Spacetime
By:
B. Nasr
Department of Physics, University of Isfahan
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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"
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• Relativistic Quantum Information Theory• Classically:
• In Relativistic QM:
• In a Curved Spacetime:
|σ
,p σ
( ), ;p x xσ
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Spin in Curved Spacetime
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Spin decoherence around a Schwarzschild black hole
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Circular motion:
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22 2 2 2 2 2 211
( sin )s
s
rr r
r
drds c dt r d dθ θ φ⎛ ⎞⎜ ⎟ ⎛ ⎞⎝ ⎠
⎜ ⎟⎝ ⎠
−−
=− + + +Schwarzschild →
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