Communication method using the entangled state
OwnerNarumi Ohkawainventor
Life of this patent
Estimating the term…
Abstract
The sender and the receiver prepare two photons in the entangled state of polarization. The first photon of the two photons is sent to the sender and the second photon of the two photons is sent to the receiver. The sender measures the first photon after the first photon pass the polarizer in which the vertical polarized photon can pass, when the sender sends the signal “1”. The sender measures the first photon after the first photon pass the polarizer in which the 45 degrees polarized photon can pass, when the sender sends the signal “0”. The receiver measures the second photon by the balanced homodyne measurement. And, the receiver knows the signal from the absolute value of the result of the balanced homodyne measurement.
Claims1
a method of communication comprising;
- a step preparing the first photon and the second photon in the entangled state of polarization;
- a step sending the first photon to the sender, and sending the second photon to the receiver;
- a step that the sender measures the first photon after the first photon pass the polarizer in which the vertical polarized photon can pass when the sender sends the signal “1”, while the sender measures the first photon after the first photon pass the polarizer in which the 45 degrees polarized photon can pass when the sender sends the signal “0”;
- a step that the receiver mixes the second photon with the local oscillator light in the half beam splitter, and generates the first output light and the second output light;
- a step that the receiver measures the intensity of said first output light and the intensity of said second output light, and derives the signal value which is the difference of those.
Dependencies are inferred from the claim text.