firstday - Winter 2008 Physics 315 / 225 Proposed title:...

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Unformatted text preview: Winter 2008 Physics 315 / 225 Proposed title: Quantum Mechanics I This course will be a prerequisite for Phys. 248B Relativity/Particles/Symmetry (Spring) Phys. 324 Quantum Mechanics (Autumn) http://depts.washington.edu/jrphys/p315W08.html Instructor: J. Rothberg, Office B207 Phone 543-2989 Office Hour: Tuesday at 1:30 rothberg@u.washington.edu Other office hours and discussion sessions to be announced. Polarization of Light Classical description (E field) Linear polarization Intensity transmitted through Polaroid sheets Circular Polarization Description in terms of States Photons Agreement with classical picture State vectors Amplitude and Probability Outline 1 Jan. 7, 2008 Photons (E=hf recall photoelectric effect) State vector description of polarization State of photon after a Polaroid sheet Agreement with classical picture ( intensity proportional to cos 2 ) Probability Jan. 9, 2008 State Vectors | x > Dual vectors < x | Inner product Amplitude and Probability Example: Circularly Polarized Light through a Polaroid sheet TA office hours in Room B042 : Dan Bolton: Tuesday 9:30 and 3:30 Mat Steuck Monday 1:30 and Tuesday 2:30 First HW posted on webpage: due next Wednesday Polarization of Light Classical picture Intensity is proportional to E 2 Component of E along transmission axis is transmitted After a Polaroid sheet the direction of E is along the transmission axis Photon picture The intensity is proportional to the number of photons (E=hf for each photon) A photon is transmitted with some Probability (depends on initial photon state and on transmission axis) After a Polaroid sheet we know the polarization state of the photon Question: can we determine the state of a single photon? Jan. 11, 2008 Example : Circularly Polarized Light through a Polaroid sheet TA office hours in Room B042 : Dan Bolton: Tuesday 9:30 and 3:30 Mat Steuck Monday 1:30 and Tuesday 2:30 my office hours: Tuesday 12:30 to 2:30 or by appt. Room B207 First HW posted on webpage: due next Wednesday Cryptographic Key (classical) Reminder: photons and Polaroid sheets Quantum Key Distribution the BB84 protocol Alice sends photons to Bob Why an eavesdropper, Eve, is detectable Quantum Cryptography Jan. 14, 2008Jan....
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This note was uploaded on 03/01/2010 for the course PHYSICS 225 taught by Professor Rothberg during the Spring '10 term at University of Washington.

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firstday - Winter 2008 Physics 315 / 225 Proposed title:...

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