Violation of Bell’s Inequalities and the Idea of a Quantum Computer
A special issue of Entropy (ISSN 1099-4300). This special issue belongs to the section "Quantum Information".
Deadline for manuscript submissions: closed (31 March 2021)
Special Issue Editor
Interests: foundations of quantum mechanics; second law of thermodynamics; fundamental obscurities in quantum mechanics; mesoscopic quantum phenomena
Special Issues, Collections and Topics in MDPI journals
Special Issue Information
Dear Colleagues,
Quantum mechanics is considered fairly to be the most successful theory of physics. But this theory arose as a result of fierce disputes between its creators, Planck, Einstein, Schrodinger, and others, on the one hand, and Bohr, Heisenberg, Dirac, and others, on the other hand. The quantum debate between Einstein and Bohr resulted in the emergence of the idea of quantum computation and modern controversy about the violation of Bell’s inequalities. Alain Aspect stated in his Viewpoint published in Physics 8, 123 (2015): "By closing two loopholes at once, three experimental tests of Bell’s inequalities remove the last doubts that we should renounce local realism. They also open the door to new quantum information technologies". The title of this Viewpoint "Closing the Door on Einstein and Bohr’s Quantum Debate" implies the completion of the quantum debate. But the discussions about Bell’s inequalities indicate that the quantum debate is far from over. Alain Aspect connects fairly the possibility of new quantum information technologies, in particular quantum computation, with the renouncement of realism, since these technologies are based on the EPR correlation, the most paradoxical quantum principle that contradicts realism. But here the question arises whether it is possible to create a real device, a quantum computer, based on the principle that contradicts realism. Numerous experimental violation of Bell's inequalities are considered to be evidence of the EPR correlation. Therefore, the unfinished quantum debate about Bell's inequalities is connected with the question about the reality of a quantum computer. This connection highlights the relevance of this Special Issue on "Violation of Bell’s inequalities and the idea of a quantum computer" in which different perspectives on the violation of Bell's inequalities and the reality of a quantum computer should be presented. The questions of the Issue concern a wide range of problems in physics, mathematics, philosophy, and even the history of quantum mechanics. The latter is important, since the problem of Bell's inequality and the idea of a quantum computer are difficult to understand correctly without knowing the history of creation and controversies about quantum mechanics. Philosophy is important in connection with the question of the possibility of refuting realism.
Dr. Alexey Nikulov
Guest Editor
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