講演情報
[9p-P04-1]Improving HOM interference visibility between independent photons
〇Hsin-Pin Lo1, Kai Asaoka1, Hiroki Takesue1 (1.NTTBRL)
キーワード：
SPDC photon pairs、quantum interference、multi-photon entanglement generation
To demonstrate multiuser quantum communication with three-photon time-bin entangled states, it is necessary to improve the visibility of quantum interference, which is also related to the purity of SPDC photon pairs. Therefore, we propose two methods to enhance the visibility of quantum interference: reducing the pump pulse width or using a narrow interference for purity improvement. The HOM interference results show that visibility can be improved to approximately 80% using the two methods, but the three-photon pair generation rate is also reduced using narrower filters. Thus, in the future, shorter pump pulse widths may be used to help improve the state fidelity of three-photon time-bin entangled photon pairs.