Single-Mode Parametric-Down-Conversion States with 50 Photons as a Source for Mesoscopic Quantum Optics.
We generate pulsed, two-mode squeezed states in a single spatiotemporal mode with mean photon numbers up to 20. We directly measure photon-number correlations between the two modes with transition edge sensors up to 80 photons per mode. This corresponds roughly to a state dimensionality of 6400. We achieve detection efficiencies of 64% in the technologically crucial telecom regime and demonstrate the high quality of our measurements by heralded nonclassical distributions up to 50 photons per pulse and calculated correlation functions up to 40th order.
Integrated Quantum Optics Group, Applied Physics, University of Paderborn, 33098 Paderborn, Germany.
Georg
G
Harder
Integrated Quantum Optics Group, Applied Physics, University of Paderborn, 33098 Paderborn, Germany.|National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA.
Tim J
TJ
Bartley
National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA.
Adriana E
AE
Lita
National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA.
Sae Woo
SW
Nam
National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA.
Thomas
T
Gerrits
Integrated Quantum Optics Group, Applied Physics, University of Paderborn, 33098 Paderborn, Germany.
Christine
C
Silberhorn