Long-distance quantum communication just around the corner?

2001 ◽  
Vol 1 (3) ◽  
pp. 87-88
Author(s):  
P Kok ◽  
H Lee ◽  
N Cerf ◽  
J Dowling
Keyword(s):  
Quantum Communication ◽  
Long Distance

Perspective

scholarly journals Long Distance Quantum Communication with Atomic Ensembles

2007 ◽  
pp. 553-580
Author(s):  
C. W. Chou ◽  
S. V. Polyakov ◽  
D. Felinto ◽  
H. de Riedmatten ◽  
S. J. van Enk ◽  
...  
Keyword(s):  
Quantum Communication ◽  
Atomic Ensembles ◽  
Long Distance

Optimized architectures for long distance quantum communication

2017 ◽  
Author(s):  
Linshu Li ◽  
Sreraman Muralidharan ◽  
Chang-Ling Zou ◽  
Victor V. Albert ◽  
Jungsang Kim ◽  
...  
Keyword(s):  
Quantum Communication ◽  
Long Distance

Long distance two-party quantum crypto made simple

2012 ◽  
Vol 12 (5&6) ◽  
pp. 448-460
Author(s):  
Iordanis Kerenidis ◽  
Stephanie Wehner
Keyword(s):  
Quantum Communication ◽  
Oblivious Transfer ◽  
Difficult Problem ◽  
Entanglement Swapping ◽  
Quantum States ◽  
Large Network ◽  
Long Distance ◽  
Computational Problem ◽  
Cryptographic Primitive

Any two-party cryptographic primitive can be implemented using quantum communication under the assumption that it is difficult to store a large number of quantum states perfectly. However, achieving reliable quantum communication over long distances remains a difficult problem. Here, we consider a large network of nodes with only neighboring quantum links. We exploit properties of this cloud of nodes to enable any two nodes to achieve security even if they are not directly connected. Our results are based on techniques from classical cryptography and do not resort to technologically difficult procedures like entanglement swapping. More precisely, we show that oblivious transfer can be achieved in such a network if and only if there exists a path in the network between the sender and the receiver along which all nodes are honest. Finally, we show that useful notions of security can still be achieved when we relax the assumption of an honest path. For example, we show that we can combine our protocol for oblivious transfer with computational assumptions such that we obtain security if either there exists an honest path, or, as a backup, at least the adversary cannot solve a computational problem.

Long-distance quantum communication

2001 ◽  
pp. 213-232
Author(s):  
Hans J. Briegel
Keyword(s):  
Quantum Communication ◽  
Long Distance

scholarly journals Optimal architectures for long distance quantum communication

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Sreraman Muralidharan ◽  
Linshu Li ◽  
Jungsang Kim ◽  
Norbert Lütkenhaus ◽  
Mikhail D. Lukin ◽  
...  
Keyword(s):  
Quantum Communication ◽  
Long Distance

scholarly journals Twisted photon entanglement through turbulent air across Vienna

2015 ◽  
Vol 112 (46) ◽  
pp. 14197-14201 ◽  
Author(s):  
Mario Krenn ◽  
Johannes Handsteiner ◽  
Matthias Fink ◽  
Robert Fickler ◽  
Anton Zeilinger
Keyword(s):  
Angular Momentum ◽  
Quantum Entanglement ◽  
Quantum Communication ◽  
Entangled States ◽  
Phase Front ◽  
Quantum Channels ◽  
Long Distance ◽  
Large Alphabet ◽  
Large State Space ◽  
Promising Application

Photons with a twisted phase front can carry a discrete, in principle, unbounded amount of orbital angular momentum (OAM). The large state space allows for complex types of entanglement, interesting both for quantum communication and for fundamental tests of quantum theory. However, the distribution of such entangled states over large distances was thought to be infeasible due to influence of atmospheric turbulence, indicating a serious limitation on their usefulness. Here we show that it is possible to distribute quantum entanglement encoded in OAM over a turbulent intracity link of 3 km. We confirm quantum entanglement of the first two higher-order levels (with OAM=± 1ℏ and ± 2ℏ). They correspond to four additional quantum channels orthogonal to all that have been used in long-distance quantum experiments so far. Therefore, a promising application would be quantum communication with a large alphabet. We also demonstrate that our link allows access to up to 11 quantum channels of OAM. The restrictive factors toward higher numbers are technical limitations that can be circumvented with readily available technologies.

scholarly journals Long-Distance Measurement-Device-Independent Multiparty Quantum Communication

2015 ◽  
Vol 114 (9) ◽  
Author(s):  
Yao Fu ◽  
Hua-Lei Yin ◽  
Teng-Yun Chen ◽  
Zeng-Bing Chen
Keyword(s):  
Quantum Communication ◽  
Distance Measurement ◽  
Long Distance ◽  
Measurement Device ◽  
Measurement Device Independent

scholarly journals Efficient long-distance quantum communication using microtoroidal resonators

2011 ◽  
Vol 62 (2) ◽  
pp. 261-264
Author(s):  
F. Y. Hong ◽  
S. J. Xiong ◽  
W. H. Tang
Keyword(s):  
Quantum Communication ◽  
Long Distance
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