Quantum mechanics at the macroscopic scale - Mark Kasevich (SETI Talks 2...
Δημοσιεύτηκε στις 17 Ιουν 2016
Quantum
mechanics is a foundation of physics, chemistry and materials science.
Still, there is an ongoing debate about the emergence of the classical,
macroscopic world from the well-understood microscopic world of quantum
mechanics. We contribute to this discourse by demonstrating quantum
superposition of massive particles at the distance (0.5 m) and time
scales (2 s) of everyday life, thereby advancing the state-of-the-art of
atom de Broglie wave interferometry by nearly two orders of magnitude
[1]. In addition to testing a central tenet of quantum mechanics, we
pave the way for new precision tests of gravity, including the possible
observation of gravitational waves and tests of the equivalence
principle. In related experimental work, we demonstrate that entangled
clusters of approximately 1000 atoms can be used to achieve 10-fold
improvement in the sensitivity of quantum sensors based on atomic
transitions; the levels of performance achieved could not have been
realized with any competing (non-entangled) method [2].
[1] Kovachy, et al., Nature 528, 530 (2015).
[2] Hosten, et al., Nature 529, 505 (2016).
mechanics is a foundation of physics, chemistry and materials science.
Still, there is an ongoing debate about the emergence of the classical,
macroscopic world from the well-understood microscopic world of quantum
mechanics. We contribute to this discourse by demonstrating quantum
superposition of massive particles at the distance (0.5 m) and time
scales (2 s) of everyday life, thereby advancing the state-of-the-art of
atom de Broglie wave interferometry by nearly two orders of magnitude
[1]. In addition to testing a central tenet of quantum mechanics, we
pave the way for new precision tests of gravity, including the possible
observation of gravitational waves and tests of the equivalence
principle. In related experimental work, we demonstrate that entangled
clusters of approximately 1000 atoms can be used to achieve 10-fold
improvement in the sensitivity of quantum sensors based on atomic
transitions; the levels of performance achieved could not have been
realized with any competing (non-entangled) method [2].
[1] Kovachy, et al., Nature 528, 530 (2015).
[2] Hosten, et al., Nature 529, 505 (2016).
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