--%>
Assignment Help - homework help

Define Einstein-Podolsky-Rosen effect or EPR effect

Einstein-Podolsky-Rosen effect: EPR effect: Consider the subsequent quantum mechanical thought-experiment: Take a particle that is at rest and has spun zero (0). This spontaneously decays into two fermions (spin 1/2 particles), that stream away in the opposite directions at high speed. Due to the law of conservation of spin, we recognize that one is a spin +1/2 and the other is spin -1/2. Which one is which? According to the quantum mechanics, neither takes on a exact state until it is examined (the wave-function is collapsed).

The EPR consequence explains that when one of the particles is detected, and its spin is then computed, then the other particle -- no matter where it is in the Universe -- instantly is forced to select as well and take on the role of the other particle. This exemplifies that certain types of quantum information travel instantly; not everything is restricted by the speed of light.

Though, it can be easily explained that this consequence does not make faster-than-light communication or travel probable.

   Related Questions in Physics

  • Q : Explain Stefan-Boltzmann law

    Stefan-Boltzmann law (Stefan, L. Boltzmann): The radiated power P (that is the rate of emission of electromagnetic energy) of a hot body is proportional to the radiating surface area, A, and the 4th power of the thermodynamic temperature, T. The const

    		•
  • Q : Current through resistors How do I find

    How do I find out a maximum current flowing through a resistor with just the resistance of the resistor and it's power rating?

    		•
  • Q : Law of Lamberts Cosine State the law of

    State the law of Lamberts Cosine? Describe briefly?

    		•
  • Q : Elementary particles concepts Write

    Write down any two elementary particles that have nearly infinite life time?

    		•
  • Q : What is curvilinear motion What do you

    What do you mean by the term curvilinear motion? State in brief?

    		•
  • Q : What is Edwards-Casimir quantum vacuum

    What is Edwards-Casimir quantum vacuum drive: The hypothetical drive developing the peculiarities of quantum mechanics by restricting permitting wavelengths of the virtual photons on one side of the drive (that is the bow of the ship); the pressure pr

    		•
  • Q : Rest mass energy of the electron What

    What do you mean by the rest mass energy of the electron?

    		•
  • Q : Define Hoop conjecture Hoop conjecture

    Hoop conjecture (K.S. Thorne, 1972): The conjecture (as so far unproven, although there is substantial proof to support it) that a non-spherical object, non-spherically compressed, will only form a black hole whenever all parts of the

    		•
  • Q : Explain Event horizon Event horizon:

    Event horizon: The radius which a spherical mass should be compressed to in order to convert it into a black hole, or the radius at which the time and space switch responsibilities. Once within the event horizon, it is basically impossible to escape t

    		•
  • Q : Explain avogadro's hypothesis

    Avogadro's hypothesis (Count A. Avogadro; 1811): Equivalent volumes of all gases at similar temperature and pressure contain equivalent numbers of molecules. This is, in fact, true only for the ideal gases.  <

    		•