On the spatial coordinate measurement of two identical particles

Avi Marchewka, Er'el Granot, Zeev Schuss

Research output: Contribution to journalArticlepeer-review


Theoretically, the coordinate measurement of two identical particles at a point by two narrowly separated narrow detectors, is interpreted in the limit of shrinking width and separation, as the detection of two particles by a single narrow detector. Ordinarily, the ratio between probabilities of point measurements is independent of the width of the narrow detectors. We show here that not only this is not the case, but that in some scenarios the results depend on the way the dimensions shrink to zero. The ratio between the width and the separation determines the detection result. In particular, it is shown that the bunching parameter of bosons is not a well-defined physical property. Moreover, it may suggests that there is a difficulty in quantum measurement theory in the interpretation of coordinate measurement of two particles.

Original languageEnglish
Pages (from-to)1719-1723
Number of pages5
JournalPhysics Letters, Section A: General, Atomic and Solid State Physics
Issue number20
StatePublished - 29 Apr 2016


  • Boson bunching
  • Spatial measurement
  • Symmetrization postulate


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