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Correlation in bosons? 


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Correlations in bosons arise due to the statistical nature of identical particles and have observable effects. These correlations can be observed in experiments involving same-sign charged particles, such as pions, where an enhancement of pair production is observed for particles with a small four-momentum difference squared . Additionally, experiments with two photons have also demonstrated the effects of statistical correlations, particularly in the polarization degree of freedom . Theoretical studies have shown that inter-particle correlations in systems of ultra-cold bosons confined in one-dimensional traps can be accurately described using variational schemes based on two-body interactions . These schemes provide full control over accuracy and can capture the mutual correlations forced by interactions in a range of different external potentials .

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The paper discusses a variational scheme for the ground state of interacting bosons in one-dimensional traps. It states that all inter-particle correlations have a two-body nature and cannot be captured by distance-dependent functions.
The paper discusses a variational scheme for the ground state of interacting bosons in one-dimensional traps. It mentions that all inter-particle correlations have a two-body nature and that distance-dependent functions cannot capture these correlations in non-parabolic potentials. However, it does not provide a detailed explanation of the correlation in bosons.
The paper discusses the statistical correlation between bosons, which is observed when the wavepackets of two photons are completely overlapped. The experiment verifies this correlation in the polarization degree of freedom of photons.
The paper discusses Bose-Einstein correlations in proton-lead collisions, observing an enhancement of pair production for same-sign charged pions with a small four-momentum difference squared.
The paper discusses the Bose-Einstein correlations observed in same-sign charged pions in proton-lead collisions.

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