TY  - JOUR
AU  - Pereg, Uzi
AU  - Deppe, Christian
AU  - Boche, Holger
TI  - Quantum broadcast channels with cooperating decoders: An information-theoretic perspective on quantum repeaters
JF  - JOURNAL OF MATHEMATICAL PHYSICS
J2  - J MATH PHYS
VL  - 62
PY  - 2021
IS  - 6
PG  - 23
SN  - 0022-2488
DO  - 10.1063/5.0038083
UR  - https://m2.mtmt.hu/api/publication/32394398
ID  - 32394398
N1  - Correspondence Address: Pereg, U.; Institute of Communication Engineering, Germany; email: uzi.pereg@tum.de            
            Funding details: Deutsche Forschungsgemeinschaft, DFG, BO 1734/20-1, EXC-2111—390814868            
            Funding details: Bundesministerium für Bildung und Forschung, BMBF, 16KIS0856, 16KIS0858            
            Funding text 1: U.P., C.D., and H.B. were supported by the Bundesministerium für Bildung und Forschung (BMBF) through Grant Nos. 16KIS0856 (Pereg, Deppe) and 16KIS0858 (Boche) and by the Israel CHE Fellowship for Quantum Science and Technology (Pereg). H. Boche was also supported, in part, by the German Research Foundation (DFG), within the Gottfried Wilhelm Leibniz Prize, under Grant No. BO 1734/20-1, and within Germany’s Excellence Strategy, under Grant No. EXC-2111—390814868. Part of this work has been presented at the IEEE International Symposium on Information Theory (ISIT 2021).
AB  - Communication over a quantum broadcast channel with cooperation between the receivers is considered. The first form of cooperation addressed is classical conferencing, where receiver 1 can send classical messages to receiver 2. Another cooperation setting involves quantum conferencing, where receiver 1 can teleport a quantum state to receiver 2. When receiver 1 is not required to recover information and its sole purpose is to help the transmission to receiver 2, the model reduces to the quantum primitive relay channel. The quantum conferencing setting is intimately related to quantum repeaters as the sender, receiver 1, and receiver 2 can be viewed as the transmitter, the repeater, and the destination receiver, respectively. We develop lower and upper bounds on the capacity region in each setting. In particular, the cutset upper bound and the decode-forward lower bound are derived for the primitive relay channel. Furthermore, we present an entanglement-formation lower bound, where a virtual channel is simulated through the conference link. At last, we show that as opposed to the multiple access channel with entangled encoders, entanglement between decoders does not increase the classical communication rates for the broadcast dual. Published under an exclusive license by AIP Publishing.
LA  - English
DB  - MTMT
ER  - 

TY  - CHAP
AU  - Faraj, Al-Janabi ST
ED  - Sattar, B. Sadkhan Al Maliky
ED  - Nidaa, A. Abbas
TI  - Quantum key distribution networks
T2  - Multidisciplinary Perspectives in Cryptology and Information Security
PB  - IGI Global
CY  - Hershey (PA)
SN  - 9781466658097
PB  - IGI Global
PY  - 2014
SP  - 61
EP  - 96
PG  - 36
DO  - 10.4018/978-1-4666-5808-0.ch003
UR  - https://m2.mtmt.hu/api/publication/27225446
ID  - 27225446
LA  - English
DB  - MTMT
ER  - 

TY  - JOUR
AU  - Gyöngyösi, László
AU  - Imre, Sándor
TI  - Opening of Hidden Capacity-Domains of Quantum Channels
JF  - PROCEEDINGS OF SPIE - THE INTERNATIONAL SOCIETY FOR OPTICAL ENGINEERING
J2  - PROCEEDINGS OF SPIE
VL  - 8635
PY  - 2013
SN  - 0277-786X
DO  - 10.1117/12.2002635
UR  - https://m2.mtmt.hu/api/publication/2515264
ID  - 2515264
N1  - The results discussed above are supported by the grant TAMOP-4.2.2.B-10/1--2010-0009 and COST Action MP1006.
LA  - English
DB  - MTMT
ER  - 

TY  - CHAP
AU  - Gyöngyösi, László
TI  - Polaractivation of Hidden Private Classical Capacity Region of Quantum Channels
T2  - 2013 IEEE Symposium on Swarm Intelligence (SIS)
PB  - IEEE
CY  - New York, New York
SN  - 9781467360043
PY  - 2013
SP  - 133
EP  - 140
PG  - 8
DO  - 10.1109/SIS.2013.6615170
UR  - https://m2.mtmt.hu/api/publication/2692970
ID  - 2692970
N1  - IEEE Symposium on Quantum Computing and Computational 
Intelligence 2013 (IEEE QCCI 2013), IEEE Symposium Series on 
Computational Intelligence (IEEE SSCI 2013), 16-19 Apr 2013, 
Singapore.

The results discussed above are supported by the grant TAMOP-
4.2.2.B-10/1--2010-0009 and COST Action MP1006.
LA  - English
DB  - MTMT
ER  - 

TY  - JOUR
AU  - Gyöngyösi, László
AU  - Imre, Sándor
TI  - Polaractivation of Private Capacity-Domain of Non-Private Quantum Channels
JF  - AIP CONFERENCE PROCEEDINGS
J2  - AIP CONF PROC
VL  - 1508
PY  - 2012
SP  - 381
EP  - 385
PG  - 5
SN  - 0094-243X
DO  - 10.1063/1.4773152
UR  - https://m2.mtmt.hu/api/publication/2688585
ID  - 2688585
LA  - English
DB  - MTMT
ER  -