[21p-P18-1~14] 3.9 Optical quantum physics and technologies (formerly 3.10)

English Presentation

[21p-P18-11] Third-man quantum cryptography with time-bin qubits

〇HsinPin Lo¹, Koji Azuma¹, Toshimori Honjo¹, Takuya Ikuta¹, William J. Munro¹, Hiroki Takesue¹ (1.NTT BRL)

Keywords:

time-bin qubit,quantum cryptography,multi-photon entnglement

We used our generated three-photon time-bin Greenberger–Horne–Zeilinger state (GHZ) state to demonstrate third-man quantum cryptography (TMQC). From the results of the density matrix, Charlie can successfully control the entangled state of their secret communication. However, without Charlie’s measurement information, they cannot get any useful information.