238 research outputs found
Induced superconductivity in antimony-based two-dimensional electron gases
No full textMajorana zero modes (MZMs) are a topic of intense research as they constitute the main building block of topological qubits - a qubit type with potentially enhanced coherence time. A promising way to create these quantum states is to couple a one-dimensional (1D) semiconducting segment with spin-orbit interaction to a superconductor, in the presence of an external magnetic field. Growing the active semiconductor as a 2D layer and creating 1Dstructures by top-downprocessing might allowto realize complex multiqubit devices in the future. This thesis explores antimony-based two-dimensional electron gases (2DEGs), known for their favorable material properties, as platforms for topological superconductivity....QRD/Goswami La
Quantum Isometry Group for Spectral Triples with Real Structure
No full textGiven a spectral triple of compact type with a real structure in the sense of [Dabrowski L., J. Geom. Phys. 56 (2006), 86-107] (which is a modification of Connes' original definition to accommodate examples coming from quantum group theory) and references therein, we prove that there is always a universal object in the category of compact quantum group acting by orientation preserving isometries (in the sense of [Bhowmick J., Goswami D., J. Funct. Anal. 257 (2009), 2530-2572]) and also preserving the real structure of the spectral triple. This gives a natural definition of quantum isometry group in the context of real spectral triples without fixing a choice of 'volume form' as in [Bhowmick J., Goswami D., J. Funct. Anal. 257 (2009), 2530-2572].This paper is a contribution to the Special Issue “Noncommutative Spaces and Fields”. The full collection is available at http://www.emis.de/journals/SIGMA/noncommutative.html.
The author acknowledges the support from Indian National Science Academy for the project
‘Noncommutative Geometry and Quantum Groups’ and UKIERI, British Council
Quantum Isometry Group for Spectral Triples with Real Structure
No full textGiven a spectral triple of compact type with a real structure in the sense of [Dabrowski L., J. Geom. Phys. 56 (2006), 86-107] (which is a modification of Connes' original definition to accommodate examples coming from quantum group theory) and references therein, we prove that there is always a universal object in the category of compact quantum group acting by orientation preserving isometries (in the sense of [Bhowmick J., Goswami D., J. Funct. Anal. 257 (2009), 2530-2572]) and also preserving the real structure of the spectral triple. This gives a natural definition of quantum isometry group in the context of real spectral triples without fixing a choice of 'volume form' as in [Bhowmick J., Goswami D., J. Funct. Anal. 257 (2009), 2530-2572].This paper is a contribution to the Special Issue “Noncommutative Spaces and Fields”. The full collection is available at http://www.emis.de/journals/SIGMA/noncommutative.html.
The author acknowledges the support from Indian National Science Academy for the project
‘Noncommutative Geometry and Quantum Groups’ and UKIERI, British Council
Author Correction: In-plane selective area InSb–Al nanowire quantum networks (Communications Physics, (2020), 3, 1, (59), 10.1038/s42005-020-0324-4)
No full textThe Data availability statement of this article has been modified to add the accession link to the raw data. The old Data availability statement read “Materials and data that support the findings of this research are available within the paper. All data are available from the corresponding author upon request”. This has been replaced by “Materials and data that support the findings of this research are available within the paper. The raw data have been deposited at https://zenodo.org/record/4589484#.YEoEOy1Y7Sd”. This has been corrected in both the HTML and PDF version of the article.Correction include: The Data availability statement of this article has been modified to add the accession link to the raw data.QRD/Kouwenhoven LabQRD/Goswami LabBUS/Quantum DelftQN/Kouwenhoven LabElectronic Components, Technology and Material
Heat transfer enhancement in hybrid metal-polymer heat exchangers using extended surfaces
No full textSubmission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2023-12-01The student, Shuvankar Goswami, accepted the attached license on 2021-12-10 at 16:05.The student, Shuvankar Goswami, submitted this Thesis for approval on 2021-12-10 at 16:08.This Thesis was approved for publication on 2021-12-10 at 16:37.DSpace SAF Submission Ingestion Package generated from Vireo submission #17445 on 2022-04-06 at 17:18:08Made available in DSpace on 2022-04-29T21:47:49Z (GMT). No. of bitstreams: 2
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Previous issue date: 2021-12-10Embargo set by: Seth Robbins for item 123396
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Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD systemAuthor requested U of Illinois access only (OA after 2yrs) in Vireo ETD systemU of I OnlyUp to half of the total energy input into the industrial sector of the United States can reasonably be lost through waste heat. Most of this waste heat exists in the low temperature regime (<450°F). Metal heat exchangers prevalent in waste heat recovery are vulnerable to corrosion and costly to install and maintain. Polymers, though inadequate for most heat transfer applications due to low thermal conductivities (~0.1 W/m.K), provide a means to mitigate these issues. A hybrid configuration of combined metal-polymer tapes provides a method for reaching a suitable conductivity for waste heat recovery usage. Heat exchangers comprised of helically wound copper-polymer tapes are manufactured using a roll-to-roll process, as established in previous research. This work investigates the capability of adapting the process to integrate external fins into the hybrid design. Surface area enhancement of the outermost metal layer is a proposed way of improving the heat transfer characteristics without affecting material or thermal parameters. We report findings from conducted experiments to analyze the effectiveness of the external fins. This achieved design can enable future advancements in waste heat recovery technology for eventual industrial usage
Erratum to: The Current Evidence Base and Future Needs in Improving Children’s Well-Being Across Europe: is There a Case for a Comparative Longitudinal Survey? (Child Indicators Research, (2016), 9, 2, (371-388), 10.1007/s12187-015-9323-5)
No full text© Springer Science+Business Media Dordrecht 2017. Erratum to: Child Ind Res (2016) 9:371–388 DOI 10.1007/s12187–015–9323-5. The article The Current Evidence Base and Future Needs in Improving Children’s Well-Being Across Europe: is There a Case for a Comparative Longitudinal Survey?, written by [Haridhan Goswami, Christopher Fox and Gary Pollock], was originally published Online First without open access. After publication in volume [9] , issue [2], page [371-388] the author decided to opt for Open Choice and to make the article an open access publication. Therefore, the copyright of the article has been changed to © The Author(s) [2016] and the article is forthwith distributed under the terms of the Creative Commons Attribution
Superhydrophobic Films on Glass Surface Derived from Trimethylsilanized Silica Gel Nanoparticles
No full textInSbAs Two-Dimensional Electron Gases as a Platform for Topological Superconductivity
No full textTopological superconductivity can be engineered in semiconductors with strong spin-orbit interaction coupled to a superconductor. Experimental advances in this field have often been triggered by the development of new hybrid material systems. Among these, two-dimensional electron gases (2DEGs) are of particular interest due to their inherent design flexibility and scalability. Here, we discuss results on a 2D platform based on a ternary 2DEG (InSbAs) coupled to in situ grown aluminum. The spin-orbit coupling in these 2DEGs can be tuned with the As concentration, reaching values up to 400 meV Å, thus exceeding typical values measured in its binary constituents. In addition to a large Landé g-factor of ∼55 (comparable to that of InSb), we show that the clean superconductor-semiconductor interface leads to a hard induced superconducting gap. Using this new platform, we demonstrate the basic operation of phase-controllable Josephson junctions, superconducting islands, and quasi-1D systems, prototypical device geometries used to study Majorana zero modes. Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.QRD/Goswami LabBUS/TNO STAFFQCD/Scappucci La
Women Insurgents in India’s Northeast
No full textThe paper examines the role of women within an insurgent group called the National Socialist Council of Nagalim (NSCN) in Northeast India. The author highlights the different motivations, allegiances, and expertise women bring to the insurgent group both as combatants and in their noncombatant roles. Data for this paper is drawn from primary sources (field work, interviews with women insurgent leaders and cadres) and secondary sources.
The author dwells on the stature of women in the larger conflict affected society, highlights the juxtaposition between the influence of modernity and tradition, and how women both in the society at large and within the insurgent group navigate their roles and negotiate for better means of livelihoods. Dr. Goswami specifies that the antecedent conditions for women joining the insurgent group include a need for physical security, kinship bonding, and ethnic connections, but the reasons evolve and change over time specifically determined by the framing of the conflict that the armed group provides to its members.
The NSCN leadership structure is hierarchical and dominated by men, with women rarely making it to its top decision-making structure, not dissimilar to women’s role in Naga society.https://digital-commons.usnwc.edu/wps/1027/thumbnail.jp
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