Author
Ivan Fernandez-Corbaton
Other affiliations: Australian Research Council, Qualcomm, Macquarie University
Bio: Ivan Fernandez-Corbaton is an academic researcher from Karlsruhe Institute of Technology. The author has contributed to research in topics: Helicity & Metamaterial. The author has an hindex of 31, co-authored 152 publications receiving 3227 citations. Previous affiliations of Ivan Fernandez-Corbaton include Australian Research Council & Qualcomm.
Topics: Helicity, Metamaterial, Time of arrival, Scattering, Angular momentum
Papers published on a yearly basis
Papers
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TL;DR: In this article, the authors derived exact expressions for the multipole moments of dynamic sources that resemble in their simplicity their approximate counterparts, and validated their new expressions against analytical results for a spherical source, and then use them to calculate the induced moments for some selected sources with a non-trivial shape.
254 citations
Patent•
20 Jun 2003TL;DR: In this paper, a set of rates for each data stream to be transmitted in a multi-channel communication system is determined based on the metric associated with the data stream. But the rate for each stream is determined only for the case when the SNR required to support the data rate by the equivalent system is less than or equal to the metric.
Abstract: Techniques to determine a set of rates for a set of data streams to be transmitted in a multi-channel communication system A group of transmission channels to be used for each data stream is initially identified An equivalent system for each group is then defined to have an AWGN (or flat) channel and a spectral efficiency equal to the average spectral efficiency of the transmission channels in the group (216) A metric for each group is then derived based on the associated equivalent system, eg, set to the SNR needed by the equivalent system to support the average spectral efficiency (218) A rate for each data stream is then determined based on the metric associated with the data stream The rate is deemed to be supported by the communication system if the SNR required to support the data rate by the communication system is less than or equal to the metric (226)
223 citations
TL;DR: It is shown that the electromagnetic duality symmetry can be restored for the macroscopic Maxwell's equations by the presence of charges, and the restoration is shown to be independent of the geometry of the problem.
Abstract: In this Letter, we show that the electromagnetic duality symmetry, broken in the microscopic Maxwell’s equations by the presence of charges, can be restored for the macroscopic Maxwell’s equations. The restoration of this symmetry is shown to be independent of the geometry of the problem. These results provide a tool for the study of light-matter interactions within the framework of symmetries and conservation laws. We illustrate its use by determining the helicity content of the natural modes of structures possessing spatial inversion symmetries and by elucidating the root causes for some surprising effects in the scattering off magnetic spheres.
176 citations
TL;DR: In this article, a theoretical and practical framework for the study of light-matter interactions and the angular momentum of light is proposed based on helicity, total angular momentum, and symmetries.
Abstract: We propose a theoretical and practical framework for the study of light-matter interactions and the angular momentum of light. Our proposal is based on helicity, total angular momentum, and the use of symmetries. We compare the framework to the current treatment, which is based on separately considering spin angular momentum and orbital angular momentum and using the transfer between the two in physical explanations. In our proposal, the fundamental problem of spin and orbital angular momentum separability is avoided, predictions are made based on the symmetries of the systems, and the practical application of the concepts is straightforward. Finally, the framework is used to show that the concept of spin to orbit transfer applied to focusing and scattering is masking two completely different physical phenomena related to the breaking of different fundamental symmetries: transverse translational symmetry in focusing and electromagnetic duality symmetry in scattering.
120 citations
Patent•
16 Aug 2007TL;DR: In this article, the precoding control indication (PCI), rank, and channel quality indication (CQI) for data transmission from a transmitter to a receiver may be determined by evaluating different hypotheses.
Abstract: Techniques for sending feedback information in a wireless communication system are described. In one design, precoding control indication (PCI), rank, and channel quality indication (CQI) for data transmission from a transmitter to a receiver may be determined by evaluating different hypotheses. A report may be formed based on the PCI, rank and CQI. The PCI may include a precoding matrix or vector to use for the data transmission. The CQI may include at least one CQI value for at least one transport block to send for the data transmission. The rank and CQI may be combined based on a mapping. For example, the CQI may include one CQI value and fall within a first range of values if one transport block is preferred by the receiver. The CQI may include two CQI values and fall within a second range of values if two transport blocks are preferred.
118 citations
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Journal Article•
28,685 citations
TL;DR: Wentzel and Jauch as discussed by the authors described the symmetrization of the energy momentum tensor according to the Belinfante Quantum Theory of Fields (BQF).
Abstract: To say that this is the best book on the quantum theory of fields is no praise, since to my knowledge it is the only book on this subject But it is a very good and most useful book The original was written in German and appeared in 1942 This is a translation with some minor changes A few remarks have been added, concerning meson theory and nuclear forces, also footnotes referring to modern work in this field, and finally an appendix on the symmetrization of the energy momentum tensor according to Belinfante Quantum Theory of Fields Prof Gregor Wentzel Translated from the German by Charlotte Houtermans and J M Jauch Pp ix + 224, (New York and London: Interscience Publishers, Inc, 1949) 36s
2,935 citations
01 Jan 2006
TL;DR: The mysterious rattleback and its fluid counterpart：Developments in shear instabilities（Patrick Huerre，Falling clouds＋Elisabeth Guazzelli）ＬEcotectural fluid mechanics％Herbert Huppert ）
Abstract: 流体力学杂志“Journal of Fluid Mechanics”由剑桥大学教授George Batchelor在1956年5月创办，在国际流体力学界享有很高的学术声望，被公认为是流体力学最著名的学术刊物之一，2005年的影响因子为2．061，雄居同类期刊之首．在它创刊50周年之际，2006年5月JFM出版了第554卷的纪念特刊，其中刊登了现任主编（美国西北大学S．H．Davis教授和英国剑桥大学T．J．Pedley教授）合写的述评：“Editorial：JFM at50”，以JFM为背景，从独特的视角对近50年来流体力学的发展进行了简明的回顾和展望，并归纳了一系列非常有启发性的有趣统计数字．2006年7月21日在剑桥大学应用数学和理论物理研究所（DAMTP）举行了创刊50周年的庆祝会．下午2点，JFM的新老编辑和来宾会聚一堂，Pedley教授致开幕词，其后是5个精彩的报告：The mysterious rattleback and its fluid counterpart（Keith Moffatt），Developments in shear instabilities（Patrick Huerre），Falling clouds（Elisabeth Guazzelli），Ecotectural fluid mechanics（Paul Linden），The success of JFM（Herbert Huppert），最后由Davis教授致闭幕词．
767 citations
Patent•
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TL;DR: In this article, a multiple-access MIMO WLAN system that employs MIMI, OFDM, and TDD was proposed, which employs a channel structure with a number of configurable transport channels, supports multiple rates and transmission modes, which are configurable based on channel conditions and user terminal capabilities.
Abstract: A multiple-access MIMO WLAN system that employs MIMO, OFDM, and TDD. The system (1) uses a channel structure with a number of configurable transport channels, (2) supports multiple rates and transmission modes, which are configurable based on channel conditions and user terminal capabilities, (3) employs a pilot structure with several types of pilot (e.g., beacon, MIMO, steered reference, and carrier pilots) for different functions, (4) implements rate, timing, and power control loops for proper system operation, and (5) employs random access for system access by the user terminals, fast acknowledgment, and quick resource assignments. Calibration may be performed to account for differences in the frequency responses of transmit/receive chains at the access point and user terminals. The spatial processing may then be simplified by taking advantage of the reciprocal nature of the downlink and uplink and the calibration.
759 citations