Abstract
Recently, a laser beam asymmetrical double-slit experiment was proposed and performed, concerning ontological physical reality in quantum mechanics, under an assumption of single-photon interference. In the present study, by controlling better for saturation effects and upgrading the slit’s shape, we succeed in producing new interference samples with acceptable quality. Applying almost the same geometrical set-up, the present experiment makes the ”which-way” identification with higher experimental confidence. In the results, the ontological which-way effect observed in our recent experiment is well reconfirmed without any additional measurement of relative integral intensity.
Highlights
A laser beam asymmetrical double-slit experiment was proposed and performed, concerning ontological physical reality in quantum mechanics, under an assumption of single-photon interference
Feynman considered that a double-slit experiment with single electrons using a movable mask for closing or opening one of the slits would serve as a key test of the fundamental problem of physical reality in quantum mechanics[6]
A class of non-local reality defined by Leggett inequality has been rejected[14,15]. This does not mean the debate for physical reality in quantum mechanics is over
Summary
A laser beam asymmetrical double-slit experiment was proposed and performed, concerning ontological physical reality in quantum mechanics, under an assumption of single-photon interference. Following the idea of weak m easurements[17], Steinberg et al.[18] determined statistically averaged Bohmian trajectories, which supports the non-locality of the physical r eality[19] The latter does not mean any violation of either statistical principle or Heisenberg indeterminism[20]. From another perspective, asymmetrical double-slit experiments with different slit-width for heavy particle beam was proposed[21] and a recent asymmetrical double-slit experiment with electrons demonstrates a possibility of identification of the ”which-way” physical reality, which seems to identify qualitatively the two different diffraction patterns with interference from the two slits in a pre-Fraunhofer c ondition[22]. We report on the results of a similar experiment with lower photon intensity in the vicinity of the main minima, for upgrading and reconfirmation of the previous which-way phenomenon by a new design of the asymmetrical double-slits
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