Results 41 to 50 of about 205,290 (317)

Comment on “Quantum key agreement protocol” [PDF]

International Journal of Quantum Information, 2020
The first two-party Quantum Key Agreement (QKA) protocol, based on quantum teleportation, was proposed by Zhou et al. (Electron. Lett. 40(18) (2004) 1149). In this protocol, to obtain the key bit string, one of the parties uses a device to obtain the inner product of two quantum states, one being unknown, and the other one performs Bell measurement ...
Nayana Das, Ritajit Majumdar
openaire   +2 more sources

Strategies for Positive Partial Transpose (PPT) States in Quantum Metrologies with Noise

, 2021
Quantum metrology overcomes standard precision limits and has the potential to play a key role in quantum sensing. Quantum mechanics, through the Heisenberg uncertainty principle, imposes limits on the precision of measurements.
Majumder, Arunava, Kwek, Leong-Chuan, Arunava Majumder, Harshank Shrotriya, Leong-Chuan Kwek, Shrotriya, Harshank   +5 more
core   +1 more source

Lightweight Authentication for Quantum Key Distribution [PDF]

IEEE Transactions on Information Theory, 2020
Quantum key distribution (QKD) enables unconditionally secure communication between distinct parties using a quantum channel and an authentic public channel. Reducing the portion of quantum-generated secret keys, that is consumed during the authentication procedure, is of significant importance for improving the performance of QKD systems.
Evgeniy O. Kiktenko, Aleksei O. Malyshev, Maxim A. Gavreev, Anton A. Bozhedarov, Nikolay O. Pozhar, Maxim N. Anufriev, Aleksey K. Fedorov   +6 more
openaire   +2 more sources

Spatially modulated thermal light in atomic medium for enhanced ghost imaging

Scientific Reports, 2017
Recent years have seen vast progress in image modulation based on atomic media, with potential applications in both classical optical imaging and quantum imaging regions.
Mingtao Cao, Jinwen Wang, Xin Yang, Shuwei Qiu, Hong Gao, Fuli Li   +5 more
doaj   +1 more source

Quantum dense key distribution [PDF]

Physical Review A, 2004
This paper proposes a new protocol for quantum dense key distribution. This protocol embeds the benefits of a quantum dense coding and a quantum key distribution and is able to generate shared secret keys four times more efficiently than BB84 one. We hereinafter prove the security of this scheme against individual eavesdropping attacks, and we present ...
DEGIOVANNI, IVO PIETRO, RUO BERCHERA, IVANO, CASTELLETTO S, RASTELLO, MARIA LUISA, BOVINO F. A, COLLA A. M, CASTAGNOLI G.   +6 more
openaire   +4 more sources

Noiseless photonic non-reciprocity via optically-induced magnetization

Nature Communications, 2021
Optical nonreciprocity through magneto-optical effects requires bulky apparatuses and strong magnetic fields, while magnetic-free approaches are difficult to implement. Here, the authors use optically-induced magnetisation in an atomic ensemble to get 50
Xin-Xin Hu, Zhu-Bo Wang, Pengfei Zhang, Guang-Jie Chen, Yan-Lei Zhang, Gang Li, Xu-Bo Zou, Tiancai Zhang, Hong X. Tang, Chun-Hua Dong, Guang-Can Guo, Chang-Ling Zou   +11 more
doaj   +1 more source

The Case for Quantum Key Distribution [PDF]

, 2010
Quantum key distribution (QKD) promises secure key agreement by using quantum mechanical systems. We argue that QKD will be an important part of future cryptographic infrastructures. It can provide long-term confidentiality for encrypted information without reliance on computational assumptions. Although QKD still requires authentication to prevent man-
Douglas Stebila, Michele Mosca, Norbert Lütkenhaus   +2 more
openaire   +4 more sources

Salmonella lipopolysaccharide‐containing supported lipid bilayers as platforms to study bacteriophage interactions

FEBS Letters, EarlyView.
We present robust protocols for the preparation of supported lipid bilayers (SLBs) incorporating either Salmonella smooth LPS or outer membrane vesicles (OMVs). We use a combination of quartz crystal microbalance with dissipation (QCM‐D) and fluorescence microscopy to both characterize the SLBs of various compositions and to probe their interactions ...
Hudson P. Pace, Alyssa Borges, Charles Arnaud, Tove Karlsson, Nina K. Bröker, Stefanie Barbirz, Marta Bally   +6 more
wiley   +1 more source

Mixed‐class J‐domain protein scaffolds promote expanded aggregate handling and multivalent Hsp70 engagement during functional disaggregase assembly

FEBS Letters, EarlyView.
Protein aggregates threaten proteostasis and cell health. In human cells, Hsp70–J‐domain protein‐based disaggregases remove aggregates, but how they assemble remains unclear. Our biochemical findings show that DNAJA2‐ and DNAJB1‐containing disaggregase scaffolds enhance luciferase aggregate targeting, and that Hsp70 recruitment by both J‐domain ...
Anna Szlachcic, Nadinath B. Nillegoda
wiley   +1 more source

Reconstructing enzyme evolution by protein engineering

FEBS Letters, EarlyView.
Natural enzyme evolution can be retraced by protein engineering methods such as directed evolution, rational design, and ancestral sequence reconstruction. These approaches reveal how enzymes emerged from ligand‐binding scaffolds, developed varying substrate preferences, formed oligomeric complexes, adapted to environmental changes, and evolved novel ...
Lukas Drexler, Markus R. Busch, Reinhard Sterner   +2 more
wiley   +1 more source