Many early quantum physicists held some interest in traditionally
Eastern metaphysics. Physicists
Werner Heisenberg and
Erwin Schrödinger, two of the main pioneers of quantum mechanics in the 1920s, were interested in
Eastern mysticism, but are not known to have directly associated one with the other. In fact, both endorsed the
Copenhagen interpretation of quantum mechanics. The historian of religion
Olav Hammer said that "
Schrödinger’s studies of Hindu mysticism never compelled him to pursue the same course as
quantum metaphysicists such as
David Bohm or
Fritjof Capra." Schrödinger biographer Walter J. Moore said that Schrödinger's two interests of quantum physics and Hindu mysticism were "strangely dissociated". In his 1961 paper "Remarks on the mind–body question",
Eugene Wigner suggested that a conscious observer played a fundamental role in quantum mechanics, a concept which is part of the
consciousness causes collapse interpretation. While his paper served as inspiration for later mystical works by others, By the late 1970s, Wigner had shifted his position and rejected the role of consciousness in quantum mechanics. Harvard historian Juan Miguel Marin suggests that "consciousness [was] introduced hypothetically at the birth of quantum physics, [and] the term 'mystical' was also used by its founders, to argue in favor of and against such an introduction." Mysticism was argued against by
Albert Einstein. Einstein's theories have often been falsely believed to support mystical interpretations of quantum theory. Einstein said, with regard to quantum mysticism, "No physicist believes that. Otherwise he wouldn't be a physicist." He debates several arguments about the approval of mysticism, even suggesting
Bohr and
Pauli to be in support of and to hold a positive belief in mysticism which he believes to be false. Niels Bohr denied quantum mysticism and had rejected the hypothesis that quantum theory requires a conscious observer as early as 1927, despite having been "sympathetic towards the hypothesis that understanding consciousness might require an extension of quantum theory to accommodate laws other than those of physics". ==In New Age thought==