L22

Question 1

Linear Polarization

Answer 1

In linear polarization, the electric field direction is always parallel or antiparallel to a fixed direction.

Question 2

Orthogonality of Jones Vectors

Answer 2

orthogonal if:

• J₁* ⋅ J₂ = 0.
• if they are opposite from each other on the poincare sphere

Question 3

Quantum Information

Answer 3

Quantum information uses polarization states, e.g., ψ = α|H⟩ + β|V⟩, for quantum key distribution (BB84 protocol).

relevant?

Question 4

Optical Isolator

Answer 4

Optical isolators use polarization rotation to allow light to pass in one direction only, preventing back reflections.