TY - JOUR
T1 - Preservation of energy-time entanglement in a slow light medium
AU - Broadbent, Curtis J.
AU - Camacho, Ryan M.
AU - Xin, Ran
AU - Howell, John C.
PY - 2008/4/4
Y1 - 2008/4/4
N2 - We demonstrate the preservation of entanglement of an energy-time entangled biphoton through a slow light medium. Using the D1 and D2 fine structure resonances of Rubidium, we delay one photon of the 1.5 THz biphoton by 1.3 correlation lengths and measure the fourth order correlation fringes. After the group delay the fringe visibility is reduced from 97.0±4.4% to 80.0±4.8%, but is still sufficient to violate a Bell inequality. We show that temporal broadening is the primary mechanism for reducing the fringe visibility and that smaller bandwidths lead to greatly reduced broadening.
AB - We demonstrate the preservation of entanglement of an energy-time entangled biphoton through a slow light medium. Using the D1 and D2 fine structure resonances of Rubidium, we delay one photon of the 1.5 THz biphoton by 1.3 correlation lengths and measure the fourth order correlation fringes. After the group delay the fringe visibility is reduced from 97.0±4.4% to 80.0±4.8%, but is still sufficient to violate a Bell inequality. We show that temporal broadening is the primary mechanism for reducing the fringe visibility and that smaller bandwidths lead to greatly reduced broadening.
UR - http://www.scopus.com/inward/record.url?scp=41849138262&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.100.133602
DO - 10.1103/PhysRevLett.100.133602
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AN - SCOPUS:41849138262
SN - 0031-9007
VL - 100
JO - Physical Review Letters
JF - Physical Review Letters
IS - 13
M1 - 133602
ER -