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pro vyhledávání: '"Walther Thomas"'
We present time- and frequency-resolved simulations of quantum key distribution~(QKD) systems employing highly entangled biphoton quantum states. Our simulations are based on expansions of the covariance matrix and photon detection probabilities of b
Externí odkaz:
http://arxiv.org/abs/2412.00958
We discuss an expansion of the detection probabilities of biphoton states in terms of increasing orders of the joint spectral amplitude. The expansion enables efficient time- or frequency-resolved numerical simulations involving quantum states exhibi
Externí odkaz:
http://arxiv.org/abs/2412.00957
Noise reduction techniques based on deep learning have demonstrated impressive performance in enhancing the overall quality of recorded speech. While these approaches are highly performant, their application in audio engineering can be limited due to
Externí odkaz:
http://arxiv.org/abs/2310.11364
Autor:
Tippmann, Maximilian, Fitzke, Erik, Nikiforov, Oleg, Kleinpaß, Philipp, Dolejsky, Till, Mengler, Maximilian, Walther, Thomas
Entanglement-based QKD protocols require robust and stable photon pair sources in terms of high heralding efficiencies or photon pair generation rates even under harsh environmental conditions, e.g. when operated in the field. In this paper, we repor
Externí odkaz:
http://arxiv.org/abs/2309.12447
We demonstrate a method to reduce the number of single-photon detectors (SPDs) required in multi-party quantum key distribution (QKD) networks by a factor of two by using detector time multiplexing (DTM). We implement the DTM scheme for an entangleme
Externí odkaz:
http://arxiv.org/abs/2305.14487
Autor:
Ma, Zhenyu, Zhang, Xin, Liu, Pu, Deng, Yong, Hu, Wenyu, Chen, Longqing, Zhu, Jun, Chen, Sen, Wang, Zhengshang, Shi, Yuechun, Ma, Jian, Wang, Xiaoyi, Qiu, Yang, Zhang, Kun, Cui, Xudong, Walther, Thomas
The investigation of chemical reactions during the ion irradiation is a frontier for the study of the ion-material interaction. In order to derive the contribution of bond formation to chemistry of ion produced nanoclusters, the valence electron ener
Externí odkaz:
http://arxiv.org/abs/2305.13746
Advances in photonics require photon-number resolved simulations of quantum optical experiments with Gaussian states. We demonstrate a simple and versatile method to simulate the photon statistics of general multimode Gaussian states. The derived gen
Externí odkaz:
http://arxiv.org/abs/2209.05330
Publikováno v:
In Metabolic Engineering March 2025 88:50-62
Doppler-free three-photon coherence effects at a wavelength of 253.7 nm have been observed in thermal mercury vapor. The experimental results are compared to simulations based on a detailed theoretical model reproducing the measured effects. Based on
Externí odkaz:
http://arxiv.org/abs/2111.03023
Autor:
Fitzke, Erik, Bialowons, Lucas, Dolejsky, Till, Tippmann, Maximilian, Nikiforov, Oleg, Wissel, Felix, Gunkel, Matthias, Walther, Thomas
We present a scalable star-shaped quantum key distribution (QKD) optical fiber network. We use wavelength-division demultiplexing (WDM) of broadband photon pairs to establish key exchange between multiple pairs of participants simultaneously. Our QKD
Externí odkaz:
http://arxiv.org/abs/2110.13795