2013/04/03 by G. C. Ghirardi, GianCarlo Ghirardi · 1 citation
Computer Science · Physics and Astronomy · #Cloning (programming) #Computer science #Law #Physics #Political science #Quantum #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum channel #Quantum cloning #Quantum entanglement #Quantum mechanics #Quantum nonlocality #Quantum optics and atomic interactions #Rebuttal #Superluminal motion #Theoretical physics #quant-ph
paper · pdf · doi:10.5772/56429
29 pages, 4 figures, Book Chapter of: Advances in Quantum Mechanics, P. Bracken, ed. INTECH, 2013 Note: after having submitted this paper to the arXives, I realized that there is a mistake in eq.(1). In the last expression at the r.h.s. the p_{i} under the sum should appear squared
openalex publication_date 2013/04/03 · arxiv created 2013/05/17 · arxiv updated 2013/05/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The paper is a Chapter of a book. In it an exhaustive review of the proposals to send faster than light signals resorting to quantum nonlocality and the reduction process is presented, together with a critical analysis and rebuttal of all proposals. The most interesting part of the Chapter is the one in which the problem of quantum cloning is discussed. Actually, a proposal of superluminal signaling based on an hypothetical cloning machine has been presented by N. Herbert. The proposal does not work just because of the assumption that one can clone nonorthogonal states. The fact that such a machine is incompatible with quantum theory (i.e., the so-called No-Cloning Theorem) has been proved, for the first time, by the author of the present chapter in his referee's report to Herbert's paper. In the final part of the paper some recent (different but similarly not correct) proposals are analyzed and the reasons for which they are basically wrong are presented.