scholarly journals Chaotic Quantum Key Distribution

Cryptography ◽  
2020 ◽  
Vol 4 (3) ◽  
pp. 24
Author(s):  
Noah Cowper ◽  
Harry Shaw ◽  
David Thayer
Keyword(s):  
Quantum Computing ◽  
Quantum Key Distribution ◽  
Single Photon ◽  
Photon Emission ◽  
Key Distribution ◽  
Maximum Amount ◽  
Single Photons ◽  
Single Photon Emission ◽  
Amount Of Information ◽  
Communication Scheme

The ability to send information securely is a vital aspect of today’s society, and with the developments in quantum computing, new ways to communicate have to be researched. We explored a novel application of quantum key distribution (QKD) and synchronized chaos which was utilized to mask a transmitted message. This communication scheme is not hampered by the ability to send single photons and consequently is not vulnerable to number splitting attacks like other QKD schemes that rely on single photon emission. This was shown by an eavesdropper gaining a maximum amount of information on the key during the first setup and listening to the key reconciliation to gain more information. We proved that there is a maximum amount of information an eavesdropper can gain during the communication, and this is insufficient to decode the message.

scholarly journals Narrow-band single-photon emission in the near infrared for quantum key distribution

2006 ◽  
Vol 14 (3) ◽  
pp. 1296 ◽  
Author(s):  
E Wu ◽  
Vincent Jacques ◽  
Heping Zeng ◽  
Philippe Grangier ◽  
François Treussart ◽  
...  
Keyword(s):  
Quantum Key Distribution ◽  
Near Infrared ◽  
Narrow Band ◽  
Single Photon ◽  
Photon Emission ◽  
Key Distribution ◽  
Single Photon Emission

Plasmonic Nanobar-on-Mirror Antenna with Giant Local Chirality: a New Platform for Ultrafast Chiral Single-Photon Emission

Nanoscale ◽  
2022 ◽  
Author(s):  
Huatian Hu ◽  
Wen Chen ◽  
Xiaobo Han ◽  
Kai Wang ◽  
Peixiang Lu
Keyword(s):  
Information Transmission ◽  
Single Photon ◽  
Photon Emission ◽  
Single Photons ◽  
Single Photon Emission ◽  
Information Encoding ◽  
Additional Degree ◽  
Binary Information ◽  
Mirror Antenna ◽  
New Research

Providing an additional degree of freedom for binary information encoding and nonreciprocal information transmission, chiral single photons have become a new research frontier in quantum optics. Without using complex external...

Unambiguous State Discrimination Attack on the B92 Protocol of Quantum Key Distribution with Single Photons

2021 ◽  
Vol 24 (3) ◽  
Author(s):  
D. B. Horoshko ◽  
S. Ya. Kilin
Keyword(s):  
Quantum Key Distribution ◽  
Single Photon ◽  
Key Distribution ◽  
Single Photons ◽  
Single Photon Source ◽  
Quantum Cloning ◽  
State Discrimination ◽  
Photon Source ◽  
Unambiguous State Discrimination ◽  
B92 Protocol

We consider an unambiguous state discrimination attack on the B92 protocol of quantum key distribution, realized on the basis of polarization encoding of photons produced by a single-photon source. We calculate the secure key rate and the maximal tolerable loss for various overlaps between two signal states employed in this protocol. We make also a comparison with a physically impossible attack of perfect quantum cloning, and show that the unambiguous state discrimination is much more dangerous for the B92 protocol, than this attack, demonstrating thus, that the security of quantum key distribution is not always based on the no-cloning theorem.

scholarly journals Numeric estimation of resource requirements for a practical polarization-frame alignment scheme for quantum key distribution (QKD)

2020 ◽  
Vol 9 (5) ◽  
pp. 253-261
Author(s):  
Brendon L. Higgins ◽  
Jean-Philippe Bourgoin ◽  
Thomas Jennewein
Keyword(s):  
Quantum Key Distribution ◽  
Reference Frames ◽  
Single Photon ◽  
Key Distribution ◽  
Single Photons ◽  
Frame Alignment ◽  
Resource Requirements ◽  
Numeric Estimation ◽  
Quantum Protocol ◽  
Better Than

AbstractOwing to physical orientations and birefringence effects, practical quantum information protocols utilizing optical polarization need to handle misalignment between preparation and measurement reference frames. For any such capable system, an important question is how many resources – for example, measured single photons – are needed to reliably achieve alignment precision sufficient for the desired quantum protocol. Here, we study the performance of a polarization-frame alignment scheme used in prior laboratory and field quantum key distribution (QKD) experiments by performing Monte Carlo numerical simulations. The scheme utilizes, to the extent possible, the same single-photon-level signals and measurements as for the QKD protocol being supported. Even with detector noise and imperfect sources, our analysis shows that only a small fraction of resources from the overall signal – a few hundred photon detections, in total – are required for good performance, restoring the state to better than 99% of its original quality.

scholarly journals Spectral characterization of SPDC-based single-photon sources for quantum key distribution

2021 ◽  
Author(s):  
Sabine Euler ◽  
Erik Fitzke ◽  
Oleg Nikiforov ◽  
Daniel Hofmann ◽  
Till Dolejsky ◽  
...  
Keyword(s):  
Quantum Key Distribution ◽  
Single Photon ◽  
Complex Structure ◽  
Key Distribution ◽  
Spectral Characterization ◽  
Single Photons ◽  
Transverse Modes ◽  
Parametric Down Conversion ◽  
Photon Spectra ◽  
Down Conversion

AbstractIn our laboratory, we employ two biphoton sources for quantum key distribution. The first is based on cw parametric down-conversion of photons at 404 nm in PPKTP waveguide chips, while the second is based on the pulsed parametric down-conversion of 775 nm photons in PPLN waveguides. The spectral characterization is important for the determination of certain side-channel attacks. A Hong-Ou-Mandel experiment employing the first photon source revealed a complex structure of the common Hong-Ou-Mandel dip. By measuring the spectra of the single photons at 808 nm, we were able to associate these structures to the superposition of different transverse modes of the pump photons in our waveguide chips. The pulsed source was characterized by means of single-photon spectra measured by a sensitive spectrum analyzer as well as dispersion-based measurements. Finally, we also describe Hong-Ou-Mandel experiments using the photons from the second source.

scholarly journals Facile Synthesis of Formate-Functionalized Graphene Quantum Dots

2019 ◽  
Author(s):  
Jonathan Bruce ◽  
Jude Clapper
Keyword(s):  
Quantum Dots ◽  
Quantum Computing ◽  
Electrophilic Substitution ◽  
Structural Modification ◽  
Single Photon ◽  
Photon Emission ◽  
Graphene Quantum Dots ◽  
Functionalized Graphene ◽  
Single Photon Emission ◽  
Facile Synthesis

Graphene quantum dots have proven useful for a variety of applications due to their impressive bandgap tunability, which can be achieved through structural modification methods including edge functionalization and doping. Here, we investigate the functionalization of graphene quantum dots with formate esters using a method of noncatalyzed electrophilic substitution. We also examine the optical and structural properties of these formate-functionalized graphene quantum dots using UV-Vis Spectrophotometry, IR Spectroscopy, and NMR Spectroscopy, with the functionalization causing a redshift in absorption consistent with a reduction in bandgap. The findings in this paper have the potential to be used in applications ranging from single photon emission in quantum computing to tunable fluorescence in bioimaging.

scholarly journals Facile Synthesis of Formate-Functionalized Graphene Quantum Dots

2019 ◽  
Author(s):  
Jonathan Bruce ◽  
Jude Clapper
Keyword(s):  
Quantum Dots ◽  
Quantum Computing ◽  
Electrophilic Substitution ◽  
Structural Modification ◽  
Single Photon ◽  
Photon Emission ◽  
Graphene Quantum Dots ◽  
Functionalized Graphene ◽  
Single Photon Emission ◽  
Facile Synthesis

Graphene quantum dots have proven useful for a variety of applications due to their impressive bandgap tunability, which can be achieved through structural modification methods including edge functionalization and doping. Here, we investigate the functionalization of graphene quantum dots with formate esters using a method of noncatalyzed electrophilic substitution. We also examine the optical and structural properties of these formate-functionalized graphene quantum dots, with the functionalization causing a redshift in absorption consistent with a reduction in bandgap. The findings in this paper have the potential to be used in applications ranging from single photon emission in quantum computing to tunable fluorescence in bioimaging.

scholarly journals Facile Synthesis of Formate-Functionalized Graphene Quantum Dots

2019 ◽  
Author(s):  
Jonathan Bruce ◽  
Jude Clapper
Keyword(s):  
Quantum Dots ◽  
Quantum Computing ◽  
Electrophilic Substitution ◽  
Structural Modification ◽  
Single Photon ◽  
Photon Emission ◽  
Graphene Quantum Dots ◽  
Functionalized Graphene ◽  
Single Photon Emission ◽  
Facile Synthesis

Graphene quantum dots have proven useful for a variety of applications due to their impressive bandgap tunability, which can be achieved through structural modification methods including edge functionalization and doping. Here, we investigate the functionalization of graphene quantum dots with formate esters using a method of noncatalyzed electrophilic substitution. We also examine the optical and structural properties of these formate-functionalized graphene quantum dots, with the functionalization causing a redshift in absorption consistent with a reduction in bandgap. The findings in this paper have the potential to be used in applications ranging from single photon emission in quantum computing to tunable fluorescence in bioimaging.

scholarly journals On-demand spin-state manipulation of single-photon emission from quantum dot integrated with metasurface

2020 ◽  
Vol 6 (31) ◽  
pp. eaba8761
Author(s):  
Yanjun Bao ◽  
Qiaoling Lin ◽  
Rongbin Su ◽  
Zhang-Kai Zhou ◽  
Jindong Song ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Information Science ◽  
Single Photon ◽  
Photon Emission ◽  
Mirror Image ◽  
Single Photons ◽  
Spin States ◽  
Single Photon Emission ◽  
On Demand ◽  
On Chip

The semiconductor quantum dot (QD) has been successfully demonstrated as a potentially scalable and on-chip integration technology to generate the triggered photon streams that have many important applications in quantum information science. However, the randomicity of these photon streams emitted from the QD seriously compromises its use and especially hinders the on-demand manipulation of the spin states. Here, by accurately integrating a QD and its mirror image onto the two foci of a bifocal metalens, we demonstrate the on-demand generation and separation of the spin states of the emitted single photons. The photon streams with different spin states emitted from the QD can be flexibly manipulated to propagate along arbitrarily designed directions with high collimation of the smallest measured beaming divergence angle of 3.17°. Our work presents an effectively integrated quantum method for the simultaneously on-demand manipulation of the polarization, propagation, and collimation of the emitted photon streams.

Facile Synthesis of Formate-Functionalized Graphene Quantum Dots

2019 ◽  
Author(s):  
Jonathan Bruce ◽  
Jude Clapper
Keyword(s):  
Quantum Dots ◽  
Quantum Computing ◽  
Electrophilic Substitution ◽  
Structural Modification ◽  
Single Photon ◽  
Photon Emission ◽  
Graphene Quantum Dots ◽  
Functionalized Graphene ◽  
Single Photon Emission ◽  
Facile Synthesis

Graphene quantum dots have proven useful for a variety of applications due to their impressive bandgap tunability, which can be achieved through structural modification methods including edge functionalization and doping. Here, we investigate the functionalization of graphene quantum dots with formate esters using a method of noncatalyzed electrophilic substitution. We also examine the optical and structural properties of these formate-functionalized graphene quantum dots using UV-Vis Spectrophotometry, IR Spectroscopy, and NMR Spectroscopy, with the functionalization causing a redshift in absorption consistent with a reduction in bandgap. The findings in this paper have the potential to be used in applications ranging from single photon emission in quantum computing to tunable fluorescence in bioimaging.

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