Large-alphabet time-frequency entangled quantum key distribution by means of time-to-frequency conversion

Nunn, J.; Wright, Laura J.; Söller, Christoph; Zhang, L.; Walmsley, Ian A.; Smith, Brian J.

doi:10.1364/oe.21.015959

Cited by 160 publications

(143 citation statements)

References 68 publications

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“…The fluctuating wind speed at one single spatial point is simulated by the MS, WAWS, and AR methods, respectively, in the same initial condition listed as follows: the average wind velocity 0 = 31.654 m/s, the number of the sampling points = 1200, time step Δ = 0.1 s, and the measuring point (in meters) is located at (0, 0, 5). The error between the energy [34] of the simulated and theoretical results solved by (17) can assess the accuracy of the simulation method by fast Fourier transform (FFT) [35] and frequency-time conversion methods [36,37]: where ( ) is time series of wind velocity, ( ) the amplitude spectrum obtained from ( ) by FFT, and the lasting time of time series of wind speed. The energy Ω is calculated by the square of the amplitude spectral mode divided by the lasting time .…”

Section: Validation For the Ms Methodmentioning

confidence: 99%

Numerical Simulation of Fluctuating Wind Effects on an Offshore Deck Structure

Zhou

Han

et al. 2017

Shock and Vibration

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The offshore structures that play a vital role in oil and gas extraction are always under complicated environmental conditions such as the random wind loads. The structural dynamic response under the harsh wind is still an important issue for the safety and reliable design of offshore structures. This study conducts an investigation to analyze the wind-induced structural response of a typical offshore deck structure. An accurate and efficient mixture simulation method is developed to simulate the fluctuating wind speed, which is then introduced as the boundary condition into numerical wind tunnel tests. Large eddy simulation (LES) is utilized to obtain the time series of wind pressures on the structural surfaces and to determine the worst working condition. Finally, the wind-induced structural responses are calculated by ANSYS Parametric Design Language (APDL). The numerically predicted wind pressures are found to be consistent with the existing experimental data, demonstrating the feasibility of the proposed methods. The wind-induced displacements have the certain periodicity and change steadily. The stresses at the top of the derrick and connections between deck and derrick are relatively larger. These methods as well as the numerical examples are expected to provide references for the wind-resistant design of the offshore structures.

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Section: Validation For the Ms Methodmentioning

confidence: 99%

Numerical Simulation of Fluctuating Wind Effects on an Offshore Deck Structure

Zhou

Han

et al. 2017

Shock and Vibration

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“…In addition, it has been theoretically shown that employing multilevel quantum states (qudits) can increase the robustness of a QKD system against eavesdropping [56,57,11,58]. Although the majority of high-dimensional QKD schemes so far have employed time-bin encoding for increasing the alphabet size [59,60,61,62], it is expected that spatial-mode encoding can be alternatively used to enhance the performance of a QKD system considering the recent advances in free-space OAM communication, .…”

Section: Introductionmentioning

confidence: 99%

Quantum Information with Structured Light

Mirhosseini

2016

Frontiers in Optics 2016

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“…Among the various photonic degrees of freedom considered for high-dimensional QKD, including position-momentum [5,6], time-energy [7][8][9][10][11][12][13][14][15][16], and orbital angular momentum (OAM) [17][18][19][20], the time-energy basis is particularly appealing for implementations in today's telecommunications infrastructure. Bright time-energy-entangled photon pair sources [21] and fast, efficient detectors [22] have been developed for the telecom band.…”

Section: Introductionmentioning

confidence: 99%

Entanglement-based quantum communication secured by nonlocal dispersion cancellation

et al. 2014

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Quantum key distribution (QKD) enables participants to exchange secret information over long distances with unconditional security. However, the performance of today's QKD systems is subject to hardware limitations, such as those of available nonclassical-light sources and single-photon detectors. By encoding photons in high-dimensional states, the rate of generating secure information under these technical constraints can be maximized. Here, we demonstrate a complete time-energy entanglement-based QKD system with proven security against the broad class of arbitrary collective attacks. The security of the system is based on nonlocal dispersion cancellation between two time-energy entangled photons. This resource-efficient QKD system is implemented at telecommunications wavelength, is suitable for optical fiber and free-space links, and is compatible with wavelength-division multiplexing.

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Large-alphabet time-frequency entangled quantum key distribution by means of time-to-frequency conversion

Cited by 160 publications

References 68 publications

Numerical Simulation of Fluctuating Wind Effects on an Offshore Deck Structure

Numerical Simulation of Fluctuating Wind Effects on an Offshore Deck Structure

Quantum Information with Structured Light

Entanglement-based quantum communication secured by nonlocal dispersion cancellation

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