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Single electron may have wavefunction of a macroscopic lengthscale but cannotbe detected in two places. At the Solvay Conference of 1927, Einstein arguedthat in a combination with Bohr's postulate about wavefunction as an exhaustivecharacteristics of electron, this fact implies nonlocality related to thecollapse of a macroscopic wavefunction of single electron. This was hisobjection to Bohr's quantum mechanics (QM) in favor of de Broglie's quantumtheory. We perform an experimental test in low-temperature state of matterwhere electrons have macroscopic orbit-like wavefunctions and surprisinglyobserve nonlocality of that type. This nonlocality differs in principle fromthe well-known Einstein-Podolsky-Rosen (EPR) nonlocality because the formerdoes not imply quantum entanglement and hence is beyond the no-communicationtheorem. Our observation is the first empirical justification of the choice infavor of QM in compare with de Broglie's theory. Moreover, now we can expandthe current concept of reality and thus open the door to a realisticinterpretation of quantum formalism. Ultimately, we thus come to a quantummodel of Universe based on the standard QM.

Testing Einstein's objection of 1927 to quantum mechanics opens the door to purely quantum communication