Te whakamahinga o te irahikohangarau whakaahua ngaruiti
Te kimi tohu ngoikore
Ko tētahi o ngā tono tino whai hua o te hangarau photonics irahiko ko te kimi i ngā tohu irahiko/RF tino ngoikore. Mā te whakamahi i te kimi irahiko kotahi, he tino tairongo ake ēnei pūnaha i ngā tikanga tuku iho. Hei tauira, kua whakaatuhia e ngā kairangahau he pūnaha photonic irahiko ka taea te kimi i ngā tohu tae noa ki te -112.8 dBm me te kore he whakanui hiko. Nā tēnei tairongo tino teitei ka pai mō ngā tono pēnei i te whakawhitiwhiti kōrero ātea hohonu.
Ngā whakaahua ngaruititukatuka tohu
Ka whakatinanahia hoki e te hangarau whakaahua ngaruiti kuantum ngā mahi tukatuka tohu whānui-rahi pērā i te nekehanga ā-wāhanga me te tātari. Mā te whakamahi i tētahi huānga whatu marara me te whakarerekē i te roanga ngaru o te mārama, i whakaatuhia e ngā kairangahau te meka ka neke te ā-wāhanga RF ki te 8 GHz ka tātarihia ngā roanga ngaru RF ki te 8 GHz. He mea nui, ka tutukihia ēnei āhuatanga katoa mā te whakamahi i ngā hikohiko 3 GHz, e whakaatu ana ko te mahi he nui ake i ngā rohe whānui tuku iho.
Te mahere auau kore-rohe ki te wā
Ko tētahi āheinga whakamere e hua mai ana i te hononga matū ko te mahere i te auau kore-rohe ki te wā. Ka taea e tēnei tikanga te mahere i te whānuitanga o tētahi pūtake photon kotahi kua pupuhihia e te ngaru tonu ki tētahi rohe wā i tētahi wāhi tawhiti. Ka whakamahia e te pūnaha ngā takirua photon kua honoa, e haere ana tētahi hihi mā roto i tētahi tātari hihi, ā, ka haere tētahi mā roto i tētahi huānga marara. Nā te whakawhirinakitanga o ngā photon kua honoa ki te auau, ka maherehia te aratau tātari hihi kore-rohe ki te rohe wā.
E whakaatu ana te Pikitia 1 i tēnei ariā:
Ka taea e tēnei tikanga te whakatutuki i te ine hihi mārama ngāwari, me te kore e whakarerekē tika i te pūtake mārama i inehia.
Pūoko kōpeke
Kuantumwhatu ngaruitiKa whakaratohia hoki e te hangarau tētahi tikanga hou mō te pūoko kōpeke o ngā tohu whānui. Mā te whakamahi i te matapōkeretanga e pā ana ki te pūoko irahiko, kua whakaatuhia e ngā kairangahau tētahi pūnaha pūoko kōpeke irahiko e kaha ana ki te whakaora10 GHz RFngā irahiko. Ka whakarerekē te pūnaha i te tohu RF ki te āhua pōraritanga o te photon arorau. Kātahi ka whakaratohia e te kitenga photon kotahi he matihiko ine matapōkere taiao mō te pūoko kua pēhia. Mā tēnei, ka taea te whakahoki mai i te tohu whānui i te tere tauira Yarnyquist.
Te tohatoha kī kuantum
Haunga te whakarei ake i ngā tono photonic ngaruiti tuku iho, ka taea hoki e te hangarau irahiko te whakapai ake i ngā pūnaha whakawhitiwhiti irahiko pēnei i te tohatoha kī irahiko (QKD). I whakaatu ngā kairangahau i te tohatoha kī irahiko maha-kawe iti (SCM-QKD) mā te whakarea i te kawe iti o ngā photons ngaruiti ki runga i te pūnaha tohatoha kī irahiko (QKD). Mā tēnei ka taea te tuku i ngā kī irahiko motuhake maha i runga i te roangaru kotahi o te mārama, ā, ka whakapiki ake i te whai huatanga o te hihi.
E whakaatu ana te Pikitia 2 i te ariā me ngā hua whakamātautau o te pūnaha SCM-QKD kawe-rua:
Ahakoa he pai te hangarau whakaahua o te ngaruiti irahiko, kei reira tonu ētahi wero:
1. Te āheinga wā-tūturu iti: He nui te wā kohikohi e hiahiatia ana e te pūnaha o nāianei hei hanga anō i te tohu.
2. Te uaua ki te whakatau i ngā tohu pakū/takitahi: Nā te āhua tatauranga o te hanga anō ka whakawhāiti i tōna whai pānga ki ngā tohu kāore e hokihoki ana.
3. Tahurihia hei ngaru ngaruiti tūturu: Me whai atu ētahi atu mahi hei huri i te histogram kua hangaia anō hei ngaru e taea ai te whakamahi.
4. Ngā āhuatanga o te taputapu: Me whai atu i tētahi rangahau mō te whanonga o ngā taputapu photonic kuantum me ngā taputapu photonic ngaruiti i roto i ngā pūnaha whakakotahi.
5. Whakaurunga: Ko te nuinga o ngā pūnaha o ēnei rā e whakamahi ana i ngā wāhanga matotoru motuhake.
Hei aro atu ki ēnei wero me te whakatairanga i te mara, he maha ngā huarahi rangahau whai hua e puta ake ana:
1. Whakawhanakehia ngā tikanga hou mō te tukatuka tohu wā-tūturu me te kimi takitahi.
2. Tūhurahia ngā tono hou e whakamahi ana i te tairongo teitei, pērā i te ine i te moroiti wai.
3. Whaia te whakatinanatanga o ngā photon me ngā irahiko kua whakauruhia hei whakaiti i te rahi me te uauatanga.
4. Akohia te taunekeneke mārama-matū kua whakarei ake i roto i ngā ara iahiko whakaahua ngaruiti irahiko kua whakauruhia.
5. Whakakotahitia te hangarau photon ngaruiti kuantum me ētahi atu hangarau kuantum hou.
Wā tuku: Hepetema-02-2024