Photon chopping: New way to measure the quantum state of light

H. Paul*, P. Törmä, T. Kiss, I. Jex

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

137 Citations (Scopus)


We propose the use of a balanced 2N-port as a technique to measure the pure quantum state of a single-mode light field. In our scheme the coincidence signals of simple, realistic photodetectors are recorded at the output of the 2N-port. We show that applying different arrangements both the modulus and the phase of the coefficients in a finite superposition state can be measured. In particular, the photon statistics can be so measured with currently available devices.

Original languageEnglish
Pages (from-to)2464-2467
Number of pages4
JournalPhysical Review Letters
Issue number14
Publication statusPublished - 1 Apr 1996
MoE publication typeA1 Journal article-refereed

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