  Single electron may have wavefunction of a macroscopic lengthscale but cannot
be detected in two places. At the Solvay Conference of 1927, Einstein argued
that in a combination with Bohr's postulate about wavefunction as an exhaustive
characteristics of electron, this fact implies nonlocality related to the
collapse of a macroscopic wavefunction of single electron. This was his
objection to Bohr's quantum mechanics (QM) in favor of de Broglie's quantum
theory. We perform an experimental test in low-temperature state of matter
where electrons have macroscopic orbit-like wavefunctions and surprisingly
observe nonlocality of that type. This nonlocality differs in principle from
the well-known Einstein-Podolsky-Rosen (EPR) nonlocality because the former
does not imply quantum entanglement and hence is beyond the no-communication
theorem. Our observation is the first empirical justification of the choice in
favor of QM in compare with de Broglie's theory. Moreover, now we can expand
the current concept of reality and thus open the door to a realistic
interpretation of quantum formalism. Ultimately, we thus come to a quantum
model of Universe based on the standard QM.
