Ukusetshenziswa kwe-quantumubuchwepheshe be-microwave photonics
Ukutholwa kwesignali okubuthakathaka
Enye yezinhlelo zokusebenza ezithembisayo kakhulu zobuchwepheshe be-quantum microwave photonics ukutholakala kwezimpawu ze-microwave/RF ezibuthakathaka kakhulu. Ngokusebenzisa ukutholwa kwe-single photon, lezi zinhlelo zizwela kakhulu kunezindlela zendabuko. Isibonelo, abacwaningi babonise uhlelo lwe-quantum microwave photonic olungathola izimpawu eziphansi njenge--112.8 dBm ngaphandle kokukhulisa ngogesi. Lokhu kuzwela okuphezulu kakhulu kwenza kube kuhle kakhulu ezinhlelweni zokusebenza ezifana nokuxhumana okujulile kwesikhala.
Ama-photonic e-microwaveukucutshungulwa kwesignali
I-Quantum microwave photonics iphinde isebenzise imisebenzi yokucubungula isignali ye-bandwidth ephezulu njengokushintsha kwesigaba nokuhlunga. Ngokusebenzisa i-dispersive optical element kanye nokulungisa ubude bokukhanya, abacwaningi babonise iqiniso lokuthi isigaba se-RF sishintsha sibe ama-bandwidth okuhlunga e-RF angu-8 GHz afinyelela ku-8 GHz. Okubalulekile, lezi zici zonke zifezwa kusetshenziswa ama-electronics angu-3 GHz, okubonisa ukuthi ukusebenza kudlula imikhawulo ye-bandwidth yendabuko.
Ukumapha isikhathi okungeyona indawo
Elinye ikhono elithakazelisayo elilethwa yi-quantum entanglement ukumaka imvamisa engeyona yendawo nesikhathi. Le ndlela ingamaka i-spectrum yomthombo we-single-photon oqhutshwa yi-continuous-wave pumped kusizinda sesikhathi endaweni ekude. Uhlelo lusebenzisa ama-photon pair ahlanganisiwe lapho i-beam eyodwa idlula khona kusihlungi se-spectral kanti enye idlula ku-dispersive element. Ngenxa yokuncika kwemvamisa yama-photon ahlanganisiwe, imodi yokuhlunga ye-spectral imaka i-non-locally kusizinda sesikhathi.
Isithombe 1 sibonisa lo mqondo:
Le ndlela ingafinyelela ukulinganiswa kwe-spectral okuguquguqukayo ngaphandle kokulawula ngokuqondile umthombo wokukhanya olinganisiwe.
Ukuzwa okucindezelwe
I-Quantumi-microwave opticalubuchwepheshe buphinde buhlinzeke ngendlela entsha yokuzwa okucindezelwe kwezimpawu ze-broadband. Besebenzisa ukungahleliwe okukhona ekutholakaleni kwe-quantum, abacwaningi babonise uhlelo lokuzwa olucindezelwe lwe-quantum olukwazi ukululama.I-RF engu-10 GHzi-spectra. Uhlelo lushintsha isignali ye-RF iye esimweni se-polarization se-coherent photon. Ukutholwa kwe-single-photon bese kunikeza i-matrix yemvelo yokulinganisa okungahleliwe yokuzwa okucindezelwe. Ngale ndlela, isignali ye-broadband ingabuyiselwa ngesilinganiso sokusampula se-Yarnyquist.
Ukusatshalaliswa kokhiye we-Quantum
Ngaphezu kokuthuthukisa izinhlelo zokusebenza ze-microwave photonic zendabuko, ubuchwepheshe be-quantum bungathuthukisa nezinhlelo zokuxhumana ze-quantum ezifana nokusatshalaliswa kokhiye we-quantum (QKD). Abacwaningi babonise ukusatshalaliswa kokhiye we-quantum we-subcarrier multiplex (SCM-QKD) ngokuhlanganisa ama-photon we-microwave subcarrier ohlelweni lokusatshalaliswa kokhiye we-quantum (QKD). Lokhu kuvumela okhiye be-quantum abaningi abazimele ukuthi badluliselwe phezu kobude bokukhanya obulodwa, ngaleyo ndlela kwandise ukusebenza kahle kwe-spectral.
Isibalo 2 sibonisa umqondo kanye nemiphumela yokuhlola yohlelo lwe-SCM-QKD oluthwala izinto ezimbili:
Nakuba ubuchwepheshe be-quantum microwave photonics buthembisa, kusenezinselele ezithile:
1. Amandla alinganiselwe ngesikhathi sangempela: Uhlelo lwamanje ludinga isikhathi esiningi sokuqongelela ukuze lwakhiwe kabusha isignali.
2. Ubunzima bokubhekana nezimpawu zokuqhuma/zodwa: Uhlobo lwezibalo lokwakhiwa kabusha lukhawulela ukusebenza kwalo ezimpawini ezingaphindi.
3. Guqula ube yi-waveform yangempela ye-microwave: Kudingeka izinyathelo ezengeziwe ukuguqula i-histogram eyakhiwe kabusha ibe yi-waveform esebenzisekayo.
4. Izici zedivayisi: Kudingeka ucwaningo olwengeziwe mayelana nokuziphatha kwamadivayisi e-quantum kanye ne-microwave photonic ezinhlelweni ezihlanganisiwe.
5. Ukuhlanganiswa: Izinhlelo eziningi namuhla zisebenzisa izingxenye ezinkulu ezihlukene.
Ukuze kuxazululwe lezi zinselele futhi kuthuthukiswe lo mkhakha, kuvela iziqondiso eziningana zocwaningo ezithembisayo:
1. Thuthukisa izindlela ezintsha zokucubungula isignali ngesikhathi sangempela kanye nokutholwa okukodwa.
2. Hlola izinhlelo zokusebenza ezintsha ezisebenzisa ukuzwela okuphezulu, njengokulinganisa i-liquid microsphere.
3. Phishekela ukuqashelwa kwama-photon nama-electron ahlanganisiwe ukuze unciphise usayizi kanye nobunzima.
4. Funda ukusebenzisana okuthuthukisiwe kwezinto zokukhanya kumasekethe e-photonic e-quantum microwave ahlanganisiwe.
5. Hlanganisa ubuchwepheshe be-quantum microwave photon nobunye ubuchwepheshe be-quantum obusha.
Isikhathi sokuthunyelwe: Septhemba-02-2024