scholarly journals Nanoscale functionalized superconducting transport channels as photon detectors

2021 ◽  
Vol 103 (13) ◽  
Author(s):  
Catalin D. Spataru ◽  
François Léonard
Keyword(s):  
Photon Detectors ◽  
Transport Channels

Covalent Atomic Bridges Enable Unidirectional Enhancement of Electronic Transport in Aligned Carbon Nanotubes

2019 ◽  
Author(s):  
Mingguang Chen ◽  
Wangxiang Li ◽  
Anshuman Kumar ◽  
Guanghui Li ◽  
Mikhail Itkis ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Transport ◽  
Large Scale ◽  
The Novel ◽  
Electrical Measurements ◽  
Metal Atoms ◽  
Aligned Carbon Nanotubes ◽  
Transport Channels ◽  
Walled Carbon Nanotubes ◽  
Bulk Structures

<p>Interconnecting the surfaces of nanomaterials without compromising their outstanding mechanical, thermal, and electronic properties is critical in the design of advanced bulk structures that still preserve the novel properties of their nanoscale constituents. As such, bridging the p-conjugated carbon surfaces of single-walled carbon nanotubes (SWNTs) has special implications in next-generation electronics. This study presents a rational path towards improvement of the electrical transport in aligned semiconducting SWNT films by deposition of metal atoms. The formation of conducting Cr-mediated pathways between the parallel SWNTs increases the transverse (intertube) conductance, while having negligible effect on the parallel (intratube) transport. In contrast, doping with Li has a predominant effect on the intratube electrical transport of aligned SWNT films. Large-scale first-principles calculations of electrical transport on aligned SWNTs show good agreement with the experimental electrical measurements and provide insight into the changes that different metal atoms exert on the density of states near the Fermi level of the SWNTs and the formation of transport channels. </p>

scholarly journals Efficient experimental quantum fingerprinting with channel multiplexing and simultaneous detection

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Xiaoqing Zhong ◽  
Feihu Xu ◽  
Hoi-Kwong Lo ◽  
Li Qian
Keyword(s):  
Communication Complexity ◽  
Single Photon ◽  
Simultaneous Detection ◽  
Minimum Amount ◽  
Photon Detectors ◽  
Communication Time ◽  
Quantum Communication Complexity ◽  
Detection Of Signals ◽  
Coherent Quantum ◽  
Quantum Fingerprinting

AbstractQuantum communication complexity explores the minimum amount of communication required to achieve certain tasks using quantum states. One representative example is quantum fingerprinting, in which the minimum amount of communication could be exponentially smaller than the classical fingerprinting. Here, we propose a quantum fingerprinting protocol where coherent states and channel multiplexing are used, with simultaneous detection of signals carried by multiple channels. Compared with an existing coherent quantum fingerprinting protocol, our protocol could consistently reduce communication time and the amount of communication by orders of magnitude by increasing the number of channels. Our proposed protocol can even beat the classical limit without using superconducting-nanowire single photon detectors. We also report a proof-of-concept experimental demonstration with six wavelength channels to validate the advantage of our protocol in the amount of communication. The experimental results clearly prove that our protocol not only surpasses the best-known classical protocol, but also remarkably outperforms the existing coherent quantum fingerprinting protocol.

scholarly journals Signal-mediated nuclear transport in proliferating and growth-arrested BALB/c 3T3 cells.

1991 ◽  
Vol 115 (4) ◽  
pp. 933-939 ◽  
Author(s):  
C M Feldherr ◽  
D Akin
Keyword(s):  
High Cell Density ◽  
Unit Length ◽  
3T3 Cells ◽  
Proliferating Cells ◽  
Gold Particles ◽  
Nuclear Uptake ◽  
Large Particles ◽  
The Mean ◽  
Transport Channels ◽  
Relative Uptake

Mediated transport across the nuclear envelope was investigated in proliferating and growth-arrested (confluent or serum starved) BALB/c 3T3 cells by analyzing the nuclear uptake of nucleoplasmin-coated colloidal gold after injection into the cytoplasm. Compared with proliferating cells the nuclear uptake of large gold particles (110-270 A in diameter, including the protein coat) decreased 5.5-, 33-, and 78-fold, respectively, in 10-, 14-17-, and 21-d-old confluent cultures; however, the relative uptake of small particles (total diameter 50-80 A) did not decrease with increasing age of the cells. This finding suggests that essentially all pores remain functional in confluent populations, but that most pores lose their capacity to transport large particles. By injecting intermediate-sized gold particles, the functional diameters of the transport channels in the downgraded pores were estimated to be approximately to 130 and 110 A, in 14-17- and 21-d-old cultures, respectively. In proliferating cells, the transport channels have a functional diameter of approximately 230 A. The mean diameters of the pores (membrane-to-membrane distance) in proliferating and confluent cells (728 and 712 A, respectively) were significantly different at the 10%, but not the 5%, level. No differences in pore density (pore per unit length of membrane) were detected. Serum-deprived cells (7-8 d in 1% serum or 4 d in 0.5% serum) also showed a significant decrease in the nuclear uptake of large, but not small, gold particles. Thus, the permeability effects are not simply a function of high cell density but appear to be growth related. The possible functional significance of these findings is discussed.

FIB-SEM as a tool for characterizing single-photon detectors

2010 ◽  
Author(s):  
Anna Vilà ◽  
Juan Trenado ◽  
Albert Comerma ◽  
David Gascon ◽  
Anna Arbat ◽  
...  
Keyword(s):  
Single Photon ◽  
Photon Detectors ◽  
Single Photon Detectors

Development of hybrid photon detectors with integrated silicon pixel readout for the RICH counters of LHCb

1999 ◽  
Vol 46 (6) ◽  
pp. 1901-1906 ◽  
Author(s):  
M. Alemi ◽  
M. Campbell ◽  
F. Formenti ◽  
T. Gys ◽  
D. Piedigrossi ◽  
...  
Keyword(s):  
Photon Detectors ◽  
The Rich

scholarly journals Spatially dependent sensitivity of superconducting meanders as single-photon detectors

2012 ◽  
Vol 100 (26) ◽  
pp. 262603 ◽  
Author(s):  
G. R. Berdiyorov ◽  
M. V. Milošević ◽  
F. M. Peeters
Keyword(s):  
Single Photon ◽  
Photon Detectors ◽  
Single Photon Detectors

Quantum-dot photon detectors

Physics Today ◽  
2005 ◽  
Vol 58 (4) ◽  
pp. 9-9
Author(s):  
Phillip F. Schewe
Keyword(s):  
Quantum Dot ◽  
Photon Detectors

scholarly journals Superconducting nanowire single-photon detectors with non-periodic dielectric multilayers

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Taro Yamashita ◽  
Kentaro Waki ◽  
Shigehito Miki ◽  
Robert A. Kirkwood ◽  
Robert H. Hadfield ◽  
...  
Keyword(s):  
Single Photon ◽  
Photon Detectors ◽  
Single Photon Detectors ◽  
Superconducting Nanowire
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