Analytical First Order Comparison of Amplitude and Phase Noise in Single and Dual Mach-Zehnder Interferometer Detection Schemes for DQPSK Transmission Systems

Author(s):  
M. Eberhard ◽  
A. Maruta ◽  
M. Faisal
Entropy ◽  
2021 ◽  
Vol 23 (6) ◽  
pp. 736
Author(s):  
Janne Kotilahti ◽  
Pablo Burset ◽  
Michael Moskalets ◽  
Christian Flindt

The development of dynamic single-electron sources has made it possible to observe and manipulate the quantum properties of individual charge carriers in mesoscopic circuits. Here, we investigate multi-particle effects in an electronic Mach–Zehnder interferometer driven by a series of voltage pulses. To this end, we employ a Floquet scattering formalism to evaluate the interference current and the visibility in the outputs of the interferometer. An injected multi-particle state can be described by its first-order correlation function, which we decompose into a sum of elementary correlation functions that each represent a single particle. Each particle in the pulse contributes independently to the interference current, while the visibility (given by the maximal interference current) exhibits a Fraunhofer-like diffraction pattern caused by the multi-particle interference between different particles in the pulse. For a sequence of multi-particle pulses, the visibility resembles the diffraction pattern from a grid, with the role of the grid and the spacing between the slits being played by the pulses and the time delay between them. Our findings may be observed in future experiments by injecting multi-particle pulses into a Mach–Zehnder interferometer.


2021 ◽  
Vol 60 (9) ◽  
pp. 2652
Author(s):  
Yunrui Bai ◽  
Haijuan Yu ◽  
Yong Zhang ◽  
Zhangwang Miao ◽  
Chaojian He ◽  
...  

2018 ◽  
Vol 61 (5) ◽  
pp. 467-473
Author(s):  
A. B. Pnev ◽  
A. V. Borisova ◽  
Ya A. Denisova ◽  
K. V. Stepanov ◽  
A. A. Zhirnov ◽  
...  

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Byoung S. Ham

AbstractRecently, new physics for unconditional security in a classical key distribution (USCKD) has been proposed and demonstrated in a frame of a double Mach–Zehnder interferometer (MZI) as a proof of principle, where the unconditional security is rooted in MZI channel superposition. Due to environmental phase noise caused by temperature variations, atmospheric turbulences, and mechanical vibrations, free-space optical links have been severely challenged for both classical and quantum communications. Here, the double MZI scheme of USCKD is analyzed for greatly subdued environment-caused phase noise via double unitary transformation, resulting in potential applications of free-space optical links, where the free-space optical link has been a major research area from fundamental physics of atomic clock and quantum key distribution to potential applications of geodesy, navigation, and MIMO technologies in mobile communications systems.


1997 ◽  
Vol 33 (16) ◽  
pp. 1404 ◽  
Author(s):  
P. Gunning ◽  
J.K. Lucek ◽  
D. Nesset ◽  
J.V. Collins ◽  
C.W. Ford ◽  
...  

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