Notes: 

Quantum Systems are exponentially powerful

Based on particles: 2^500 – More particles in the universe

Challenges:

• Not all problems are well suited
• Need to understand Q Mechanics

Qubit – simplest quantum system

Entanglement-

• Bell Inequalities
• Teleportation

Lecture 1: Double Slit Experiment

• Is light a particle or a wave?
• If light was a particle, it would be like a bullet, and we would see the two beams overlap each other:

• Strange that if both holes are open why we get this strange interference pattern.
• Why did the count drop when both holes were open? From a decent amount, to nearly zero.
• If we use bullets, we would see a whole number of bullets that get through
• If we use water & waves, we get the same interference pattern.

If we add a measuring device just after the slits to track which slit the electron goes through, it “disrupts” the measurement and we get the 2nd pattern. If we use a very slight/dim light enough light, we get the 3rd “expected” pattern, but we also miss a lot of the electrons and may not capture the pattern.

= Hesienburgs uncertainty principle = Impossible to design apparatus which can detect which slit it went through without disturbing the interference pattern. read more