Patent SG-11201809481Y-A (SG)
Title: Phase reference sharing schemes for continuous-variable quantum cryptography
Inventor: ALLEAUME ROMAIN
IPC: H04L9/08
Filed: 2017-05-10
Abstract: INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property 11111111111111111111111111111111111111111111111111111111111111111111111111111111 Organization International Bureau (10) International Publication Number (43) International Publication Date .....0\"\" WO 2017/194582 Al 16 November 2017 (16.11.2017) WIPO I PCT _ (51) (21) (22) (25) Filing Language: (26) (30) (71) (72) (74) International Patent Classification: CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, H04L 9/08 (2006.01) DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, International Application Number: HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KH, KN, KP, KR, PCT/EP2017/061136 KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, International Filing Date: PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, 10 May 2017 (10.05.2017) SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. English Publication Language: English (84) Designated States (unless otherwise indicated, for every kind of regional protection available): ARIPO (BW, GH, Priority Data: GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, 16305551.0 11 May 2016 (11.05.2016) EP UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, Applicant: INSTITUT MINES TELECOM [FR/ ]; EE, ES, FL FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, 37-39 Rue Dareau, 75014 PARIS (FR). MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, Inventors: ALLEAUME, Romain; 49 Rue de l'Esperance, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, 75013 PARIS (FR). MARIE, Adrien; 18 rue des Tour- KM, ML, MR, NE, SN, TD, TG). nelles, 78000 VERSAILLES (FR). Published: Agent: HNICH-GASRI, NaIma et al.; Marks & Clerk — with international search report (Art. 21(3)) France, Immeuble \"Visium\", 22, Avenue Aristide Briand, 94117 ARCUEIL (FR). Designated States (unless otherwise indicated, for every kind of national protection available): AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, (81) — = = _ _ = = Title: PHASE REFERENCE SHARING SCHEMES FOR CONTINUOUS-VARIABLE QUANTUM CRYPTOGRAPHY ft r — 603 7 , rune = (54) — = = = = = = = . 601 A X 602 FIG. 6 : There are disclosed systems and associated methods of performing coherent optical communication of quantum infor- between an emitter A and a distant receiver B, using a local local oscillator (LLO). Examples of LLO-based Continuous-Variable Key Distribution (CV-QKD) are described. Self-coherent schemes are used, said schemes consisting in deriving both signal phase reference pulses from the same optical pulse thus ensuring an intrinsic strong signal to reference phase coherence. Different designs implementing various self-coherence phase sharing schemes are described and compared in terms of secret key rate hardware requirements. Strong phase noise resilience can be obtained with standard telecom equipment such as low cost lasers. mation j r:... .\" Quantum © CV-QKD and = — 1-1 ei GC kr) 71' c:N (57) Il and ei