منابع مشابه
Coulomb blockade at almost perfect transmission.
We study the equilibrium properties of a quantum dot connected to a bulk lead by a single-mode quantum point contact. The ground state energy and other thermodynamic characteristics of the grain show periodic dependence on the gate voltage (Coulomb blockade). We consider the case of almost perfect transmission, and show that the oscillations exist as long as the transmission coefficient of the ...
متن کاملFull transmission through perfect-conductor subwavelength hole arrays.
Light transmission through 2D subwavelength hole arrays in perfect-conductor films is shown to be complete (100%) at some resonant wavelengths even for arbitrarily narrow holes. Conversely, the reflection on a 2D planar array of nonabsorbing scatterers is shown to be complete at some wavelengths regardless how small the scatterers are. These results are proven analytically and corroborated by r...
متن کاملFrom perfect to fractal transmission in spin chains
Perfect state transfer is possible in modulated spin chains [Phys. Rev. Lett. 92, 187902 (2004)], imperfections however are likely to corrupt the state transfer. We study the robustness of this quantum communication protocol in the presence of disorder both in the exchange couplings between the spins and in the local magnetic field. The degradation of the fidelity can be suitably expressed, as ...
متن کاملPlasmonic waves allow perfect transmission through sub-wavelength metallic gratings
We investigate the transmission properties of a metallic layer with narrow slits. Recent measurements and numerical calculations concerning the light transmission through metallic subwavelength structures suggest that an unexpectedly high transmission coefficient is possible. We analyze the time harmonic Maxwell’s equations in the H-parallel case for a fixed incident wavelength. Denoting by η >...
متن کاملIdentification Plus Transmission Over Channels with Perfect Feedbac
We determine the region of all identification and transmission rate-pairs achievable over a discrete memoryless channel with perfect and instantaneous feedback, for both randomized and deterministic encoding. As a by-product, we also have a new proof of Kemperman’s strong converse to Shannon’s coding theorem for DMC’s with feedback.
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ژورنال
عنوان ژورنال: Science
سال: 2012
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.337.6097.893-b