Results 11 to 20 of about 530,558 (268)
Vacuum energy and θ-vacuum [PDF]
Nuclear Physics B - Proceedings Supplements, 2004 The highly non-trivial structure of the $θ$--vacuum encodes many of the fundamental properties of gauge theories. In particular, the response of the vacuum to the $θ$--term perturbation is sensitive to the existence of confinement, chiral symmetry breaking, etc. We analyze the dependence of the vacuum energy density on theta around two special values, $
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HYDRODYNAMICS OF THE VACUUM [PDF]
International Journal of Modern Physics A, 2006 Hydrodynamics is the appropriate "effective theory" for describing any fluid medium at sufficiently long length scales. This paper treats the vacuum as such a medium and derives the corresponding hydrodynamic equations. Unlike a normal medium the vacuum has no linear sound-wave regime; disturbances always "propagate" nonlinearly.
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Physics of Particles and Nuclei Letters, 2021 The effective potential is known to be given by the vacuum diagrams. In this paper we show that the massive loop integrations corresponding to the vacuum diagrams can be expressed through the massless loop integrations with the corresponding massive prefactor provided the special treatment of $δ(0)$-singularity.
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The vacuum-vacuum amplitude and Bogoliubov coefficients [PDF]
Journal of Experimental and Theoretical Physics, 2003 Even if the electromagnetic field does not create pairs, virtual pairs lead to the appearance of a phase in vacuum-vacuum amplitude. This makes it necessary to distinguish the in- and out-solutions even when it is commonly assumed that there is only one complete set of solutions as, for example, in the case of a constant magnetic field.
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New Vacuum Electronic Devices for Radar
Leida xuebao, 2016 Vacuum Electronic Devices (VEDs) which are considered as the heart of a radar system, play an important role in their development. VEDs and radar systems supplement and promote each other.
Hu Yinfu, Feng Jinjun
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Journal of Bacteriology, 2005 Ever since their discovery multidrug resistance (MDR) transporters have provided a plethora of fascinating and challenging topics for fundamental and applied research. Recognized first as a cause of resistance of tumor cells to anticancer agents (reviewed in reference 5), they were later discovered in all living organisms, from bacteria to humans.
Olga, Lomovskaya, Maxim, Totrov
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Journal of Modern Optics, 2017 8 pages, 2 figures. Published in Journal of Modern Optics on 14 September 2017.
Stephen M. Barnett, Matthias Sonnleitner
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Analysis of Suitability of Fixed-wing Aircraft for Launching Satellites into Low Earth Orbit [PDF]
Problemy MechatronikiThe use of near-Earth space for scientific and commercial purposes has skyrocketed in recent years. However, progress continues to be hampered by the cost and availability of vehicles relied upon for delivering payloads to the Earth’s orbit.
Zbigniew KORUBA (ksmzko@tu.kielce.pl) +3 more
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Electronics Letters, 2023 An ultrashort H‐plane sheet beam traveling‐wave tube (SB‐TWT) coupler without transition structure is proposed. The coupler adopts a new idea of directly coupling the microwave from H‐plane of the slow‐wave circuit (SWC) and optimizes the matching by ...
Zheng Guo +3 more
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