PT Journal
AU Bozyigit, D
   Lang, C
   Steffen, L
   Fink, JM
   Eichler, C
   Baur, M
   Bianchetti, R
   Leek, PJ
   Filipp, S
   da Silva, MP
   Blais, A
   Wallraff, A
TI Antibunching of microwave-frequency photons observed in correlation measurements using linear detectors
SO Nature Physics
JI Nat. Phys.
PY 2011
BP 154
EP 158
VL 7
IS 2
DE fromIPMRAS
AB At optical frequencies the radiation produced by a source, such as a laser, a black body or a single-photon emitter, is frequently characterized by analysing the temporal correlations of emitted photons using single-photon counters. At microwave frequencies, however, there are no efficient single-photon counters yet. Instead, well-developed linear amplifiers allow for efficient measurement of the amplitude of an electromagnetic field. Here, we demonstrate first- and second-order correlation function measurements of a pulsed microwave-frequency single-photon source integrated on the same chip with a 50/50 beam splitter followed by linear amplifiers and quadrature amplitude detectors. We clearly observe single-photon coherence in first-order and photon antibunching in second-order correlation function measurements of the propagating fields.
ER