Direct observation of the particle exchange phase of photons
- URL: http://arxiv.org/abs/2011.08777v1
- Date: Tue, 17 Nov 2020 17:04:29 GMT
- Title: Direct observation of the particle exchange phase of photons
- Abstract summary: The symmetry of the states can be inferred indirectly from the fact that neglecting the correct exchange symmetry in the theoretical analysis leads to dramatic discrepancies with the observations.
We have measured the exchange phase of indistinguishable photons, providing direct evidence of the bosonic character of photons.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Quantum theory stipulates that if two particles are identical in all physical
aspects, the allowed states of the system are either symmetric or antisymmetric
with respect to permutations of the particle labels. Experimentally, the
symmetry of the states can be inferred indirectly from the fact that neglecting
the correct exchange symmetry in the theoretical analysis leads to dramatic
discrepancies with the observations. The only way to directly unveil the
symmetry of the states for, say, two identical particles is through the
interference of the original state and the physically permuted one, and measure
the phase associated with the permutation process, the so-called particle
exchange phase. Following this idea, we have measured the exchange phase of
indistinguishable photons, providing direct evidence of the bosonic character
of photons.
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