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Baksheeva, K.; Vdovydchenko, A.; Gorshkov, K.; Ozhegov, R.; Kinev, N.; Koshelets, V.; Goltsman, G. |
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Study of human skin radiation in the terahertz frequency range |
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Conference Article |
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2019 |
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J. Phys.: Conf. Ser. |
Abbreviated Journal |
J. Phys.: Conf. Ser. |
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1410 |
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012076 (1 to 5) |
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SIS mixer, SIR, applications, medicine, sympathetic nervous system, SNS |
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The radiation of human skin in the terahertz frequency range under the influence of mental stresses has been studied in the current work. An experimental setup for observation of changes in human skin radiation, which occur under the influence of psychological stresses, by means of a superconducting integrated receiver has been developed. More than 30 volunteers participate in these studies, which allows us to verify presence of correlation between the signals from the superconducting integrated terahertz receiver and other sensors that monitor human mental stress. |
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1742-6588 |
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1272 |
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Author |
Elezov, M.; Ozhegov, R.; Goltsman, G.; Makarov, V. |
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Title |
Countermeasure against bright-light attack on superconducting nanowire single-photon detector in quantum key distribution |
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Journal Article |
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Year |
2019 |
Publication |
Opt. Express |
Abbreviated Journal |
Opt. Express |
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27 |
Issue |
21 |
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30979-30988 |
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Keywords |
SSPD, SNSPD |
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We present an active anti-latching system for superconducting nanowire single-photon detectors. We experimentally test it against a bright-light attack, previously used to compromise security of quantum key distribution. Although our system detects continuous blinding, the detector is shown to be partially blindable and controllable by specially tailored sequences of bright pulses. Improvements to the countermeasure are suggested. |
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English |
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1094-4087 |
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PMID:31684339 |
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1275 |
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Baksheeva, K.; Ozhegov, R.; Goltsman, G.; Kinev, N.; Koshelets, V.; Kochnev, A.; Betzalel, N.; Puzenko, A.; Ben Ishai, P.; Feldman, Y. |
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The sub THz emission of the human body under physiological stress |
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Journal Article |
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2021 |
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IEEE Trans. Terahertz Sci. Technol. |
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IEEE Trans. Terahertz Sci. Technol. |
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skin sub-THz emission, medicine |
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We present evidence that in the sub-THz frequency band, human skin can be considered as an electromagnetic bio-metamaterial, in that its natural emission is a product of skin tissue geometry and embedded structures. Radiometry was performed on 32 human subjects from 480 to 700 GHz. Concurrently, the subjects were exposed to stress, while heart pulse rate (PS) and galvanic skin response (GSR) were also measured. The results are substantially different from the expected black body radiation signal of the skin surface. PS and GSR correlate to the emissivity. Using a simulation model for the skin, we find that the sweat duct is a critical element. The simulated frequency spectra qualitatively match the measured emission spectra and show that our sub-THz emission is modulated by our level of mental stress. This opens avenues for the remote monitoring of the human state. |
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1259 |
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