The More You Know: EPR Paradox

The EPR Paradox is a thought experiment published in a paper in May 1935 by Albert Einstein and two of his postdoctoral research associates Boris Podolsky and Nathan Rosen that was meant to prove that Quantum Mechanics showed internal contradictions in it’s formulation. The authors claimed that if the description of physical reality given by the wave function is complete, then two quantities described by non-commuting operators could have simultaneous real values. We could for instance measure the position and the momentum of two entangled particles with more accuracy than that allowed by Heisenberg’s Uncertainty Principle. Therefore concluding that quantum-mechanical’s wave function description of reality is incomplete.

This thought experiment is considered to be one of the first papers to put the spotlight on quantum entanglement.

For a more extensive explanation you can visit this post.

This apparent paradox was finally solved by an experiment proposed by physicist J. S. Bell (see Bell’s Inequalities).

Go to the Dictionary of Quantum Information and Quantum Computation.


[1] “Can Quantum-Mechanical Description of Physical Reality Be Considered Complete?“, A. Einstein, B. Podolsky, and N. Rosen, Phys. Rev. 47, 777 (1935).

 All text copyright © Marco Vinicio Sebastian Cerezo de la Roca.

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The More You Know: EPR Paradox by Marco Vinicio Sebastian Cerezo de la Roca is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.


About marcocerezo

My name is Marco Cerezo, I have a degree in physics from the Universidad Nacional de la Plata (UNLP) in Buenos Aires, Argentina, and I'm a Ph.D student. Although I study in Argentina, I was born and raised in Guatemala, so I consider myself "chapín" at heart. From an early age I discovered how exciting, interesting and fun physics can be, so I decided to devote myself to study this passionate field. This blog is dedicated to all those who want to dig a little into the mysteries and beauty of physics. And in particular, to all those who are interested in studying Quantum Computation and Quantum Information. ---------------------------------------------------------------------------------------------------------- Mi nombre es Marco Cerezo, Licenciado en Física egresado de la Universidad Nacional de la Plata (UNLP) en Buenos Aires, Argentina. Actualmente estoy haciendo mi Doctorado en física. Aunque estudio en Argentina, nací y crecí en Guatemala por lo que me considero chapín de corazón. Desde muy temprana edad descubrí lo apasionante, interesante y divertida que es la física por lo que decidí dedicarme a su estudio. Este blog es está dedicado a todos aquellos que quieren indagar un poco en los misterios y la belleza de la física; y en particular, a aquellos que quieran aprender sobre Computación e Información Cuántica.
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