Eraser Definition and 118 Threads

How does an eraser (rubber, for non-US) work? Any why it works only for pencil(or graphite) , not for pen?

I am having difficulty understanding why the single rate of detection (as opposed to the coincidence rate) is unaffected during Quantum Eraser experiments. I'm looking at the great Kwait, Steinberg and Chiao paper: 'Observation of a "quantum eraser": A revival of coherence in a two-photon...

The paper described at http://en.wikipedia.org/wiki/Delayed_choice_quantum_eraser rather intrigues me. While the results appear counter intuitive to us, the properties being tested are those of light, and since light travels at speed c, is it not the case that for light time stands still...

Considering how quirky the theme is, we have a very good group of pictures for this contest. Please vote for the picture that best represents our theme - Rubber Eraser! 1. Chi Meson 2. scorpa 3. Physics is Phun http://img263.imageshack.us/img263/4233/img2695pm1.jpg 4...

[FONT="Comic Sans MS"]Rubber Eraser This is silly enough, and trivial enough, that I just HAD to include it in our contest. April 15 is, get this, http://www.holidayinsights.com/other/rubbereraserday.htm" here in the US! Honest! You can't make these things up! So, to mark this joyous occasion...

Question: What would happen if this was delayed even further? We are talking nanoseconds here, but what if the particle was slowed or sent far away, before being reflected back? What I'm getting at is... What if the delay wasn't nanoseconds, but seconds? What if it was minutes? What if it was...

well,im thinkin of designing an eraser,specifically the conventional chalk eraser, that can act like a vacuum cleaner,in the sense that i would have to put a motor in it,for the reason that the user would have to use a lesser effort for him to erase something,nd no chalk dust...well u could say...

I have a question about the delayed choice quantum eraser with the double split experiment. Forgive me if this is a silly question.I have seen the following: TEST 1 1. shoot the particles & measure the result 2. erase the result 3. check the wall (whatever you shot the particle at) = wall...

http://www.joot.com/dave/writings/articles/entanglement/spookiness.shtml http://www.joot.com/dave/writings/articles/entanglement/quantum-eraser.png 1. a laser fires photons into a Beta Barium Borate (BBO) crystal; 2. the crystal entangles some of the photons; and then 3. entangled...

Magnetic Eraser? Hi, My friend and I were arguing about this the other day and I wanted some input from you guys: How many teslas would it take to potentially harm a computer. In the lab we use a .155Tesla magnet to move encased objects around in our rutherford scattering lab. I said that...

I am a High School Senior in Advanced Physics Topics class. We have recently deiscussed the basic double slit experiments and ways of quntum erasing and delaying choices, and how those situation affect the outcome of the screen whether it will show an interference pattern or not. We then...

An eraser slides down a slope of height 1m that makes an angle of 35 degrees with the ground. It takes the eraser 1,8s to do this. Find the coefficient of friction. I have no clue how to do this. I've not been able to solve any of the equations I've tried, because there is always the mass of...

Quantum mechanics has actually shown thru the quantum eraser experiments that we can rewrite the histories of photons, and that time is symmetrical. The best example of this is the translational interaction or pilot wave theory, where a particle future and particle past selves our in constant...

Hello all, I saw this setup for a quantum eraser: http://grad.physics.sunysb.edu/~amarch/PHY5656.gif In this setup, we get no interference: http://grad.physics.sunysb.edu/~amarch/PHY5658.gif Then, by inserting a polarizer we can erase the which way information: Setup with...

I have been contemplating this experiment for quite some time now, and I have some questions. http://xxx.lanl.gov/PS_cache/quant-ph/pdf/9903/9903047.pdf is a preliminary copy of the paper describing the experiment, for reference. The first and most obvious question would be whether it is...

Patrick posted the following interesting link in another thread: I'd like to discuss this some more. Whenever I have read about these experiments I have always hoped to see the results of one in particular but I have never found what I wanted. I can guess what the results would be, but...

where can i get an online copy of the original paper of Scully and Druhl ( about the quantum eraser experiment) ? and any other good material on the topic . also where can i get something about Popper's experiment? please help.

I was reading about Scully and Druhl's delayed-choice quantum eraser in Brian Greene's Fabric of the Cosmos today and I had a couple of questions that maybe you guys can help me with. As I understand the idea, in one type of this of experiment a photon is fired(?) to a beam splitter the...