--- _id: '5803' abstract: - lang: eng text: Different distance metrics produce Voronoi diagrams with different properties. It is a well-known that on the (real) 2D plane or even on any 3D plane, a Voronoi diagram (VD) based on the Euclidean distance metric produces convex Voronoi regions. In this paper, we first show that this metric produces a persistent VD on the 2D digital plane, as it comprises digitally convex Voronoi regions and hence correctly approximates the corresponding VD on the 2D real plane. Next, we show that on a 3D digital plane D, the Euclidean metric spanning over its voxel set does not guarantee a digital VD which is persistent with the real-space VD. As a solution, we introduce a novel concept of functional-plane-convexity, which is ensured by the Euclidean metric spanning over the pedal set of D. Necessary proofs and some visual result have been provided to adjudge the merit and usefulness of the proposed concept. alternative_title: - LNCS article_processing_charge: No author: - first_name: Ranita full_name: Biswas, Ranita id: 3C2B033E-F248-11E8-B48F-1D18A9856A87 last_name: Biswas orcid: 0000-0002-5372-7890 - first_name: Partha full_name: Bhowmick, Partha last_name: Bhowmick citation: ama: 'Biswas R, Bhowmick P. Construction of persistent Voronoi diagram on 3D digital plane. In: Combinatorial Image Analysis. Vol 10256. Cham: Springer Nature; 2017:93-104. doi:10.1007/978-3-319-59108-7_8' apa: 'Biswas, R., & Bhowmick, P. (2017). Construction of persistent Voronoi diagram on 3D digital plane. In Combinatorial image analysis (Vol. 10256, pp. 93–104). Cham: Springer Nature. https://doi.org/10.1007/978-3-319-59108-7_8' chicago: 'Biswas, Ranita, and Partha Bhowmick. “Construction of Persistent Voronoi Diagram on 3D Digital Plane.” In Combinatorial Image Analysis, 10256:93–104. Cham: Springer Nature, 2017. https://doi.org/10.1007/978-3-319-59108-7_8.' ieee: 'R. Biswas and P. Bhowmick, “Construction of persistent Voronoi diagram on 3D digital plane,” in Combinatorial image analysis, vol. 10256, Cham: Springer Nature, 2017, pp. 93–104.' ista: 'Biswas R, Bhowmick P. 2017.Construction of persistent Voronoi diagram on 3D digital plane. In: Combinatorial image analysis. LNCS, vol. 10256, 93–104.' mla: Biswas, Ranita, and Partha Bhowmick. “Construction of Persistent Voronoi Diagram on 3D Digital Plane.” Combinatorial Image Analysis, vol. 10256, Springer Nature, 2017, pp. 93–104, doi:10.1007/978-3-319-59108-7_8. short: R. Biswas, P. Bhowmick, in:, Combinatorial Image Analysis, Springer Nature, Cham, 2017, pp. 93–104. conference: end_date: 2017-06-21 location: Plovdiv, Bulgaria name: 'IWCIA: International Workshop on Combinatorial Image Analysis' start_date: 2017-06-19 date_created: 2019-01-08T20:42:56Z date_published: 2017-05-17T00:00:00Z date_updated: 2022-01-28T07:48:24Z day: '17' department: - _id: HeEd doi: 10.1007/978-3-319-59108-7_8 extern: '1' intvolume: ' 10256' language: - iso: eng month: '05' oa_version: None page: 93-104 place: Cham publication: Combinatorial image analysis publication_identifier: isbn: - 978-3-319-59107-0 - 978-3-319-59108-7 issn: - 0302-9743 - 1611-3349 publication_status: published publisher: Springer Nature quality_controlled: '1' status: public title: Construction of persistent Voronoi diagram on 3D digital plane type: book_chapter user_id: 8b945eb4-e2f2-11eb-945a-df72226e66a9 volume: 10256 year: '2017' ... --- _id: '313' abstract: - lang: eng text: 'Tunneling of a particle through a potential barrier remains one of the most remarkable quantum phenomena. Owing to advances in laser technology, electric fields comparable to those electrons experience in atoms are readily generated and open opportunities to dynamically investigate the process of electron tunneling through the potential barrier formed by the superposition of both laser and atomic fields. Attosecond-time and angstrom-space resolution of the strong laser-field technique allow to address fundamental questions related to tunneling, which are still open and debated: Which time is spent under the barrier and what momentum is picked up by the particle in the meantime? In this combined experimental and theoretical study we demonstrate that for strong-field ionization the leading quantum mechanical Wigner treatment for the time resolved description of tunneling is valid. We achieve a high sensitivity on the tunneling barrier and unambiguously isolate its effects by performing a differential study of two systems with almost identical tunneling geometry. Moreover, working with a low frequency laser, we essentially limit the non-adiabaticity of the process as a major source of uncertainty. The agreement between experiment and theory implies two substantial corrections with respect to the widely employed quasiclassical treatment: In addition to a non-vanishing longitudinal momentum along the laser field-direction we provide clear evidence for a non-zero tunneling time delay. This addresses also the fundamental question how the transition occurs from the tunnel barrier to free space classical evolution of the ejected electron.' alternative_title: - 'Journal of Physics: Conference Series' article_number: '012004' author: - first_name: Nicolas full_name: Camus, Nicolas last_name: Camus - first_name: Enderalp full_name: Yakaboylu, Enderalp id: 38CB71F6-F248-11E8-B48F-1D18A9856A87 last_name: Yakaboylu orcid: 0000-0001-5973-0874 - first_name: Lutz full_name: Fechner, Lutz last_name: Fechner - first_name: Michael full_name: Klaiber, Michael last_name: Klaiber - first_name: Martin full_name: Laux, Martin last_name: Laux - first_name: Yonghao full_name: Mi, Yonghao last_name: Mi - first_name: Karen full_name: Hatsagortsyan, Karen last_name: Hatsagortsyan - first_name: Thomas full_name: Pfeifer, Thomas last_name: Pfeifer - first_name: Cristoph full_name: Keitel, Cristoph last_name: Keitel - first_name: Robert full_name: Moshammer, Robert last_name: Moshammer citation: ama: 'Camus N, Yakaboylu E, Fechner L, et al. Experimental evidence for Wigner’s tunneling time. In: Vol 999. American Physical Society; 2017. doi:10.1088/1742-6596/999/1/012004' apa: 'Camus, N., Yakaboylu, E., Fechner, L., Klaiber, M., Laux, M., Mi, Y., … Moshammer, R. (2017). Experimental evidence for Wigner’s tunneling time (Vol. 999). Presented at the Annual International Laser Physics Workshop LPHYS, Kazan, Russian Federation: American Physical Society. https://doi.org/10.1088/1742-6596/999/1/012004' chicago: Camus, Nicolas, Enderalp Yakaboylu, Lutz Fechner, Michael Klaiber, Martin Laux, Yonghao Mi, Karen Hatsagortsyan, Thomas Pfeifer, Cristoph Keitel, and Robert Moshammer. “Experimental Evidence for Wigner’s Tunneling Time,” Vol. 999. American Physical Society, 2017. https://doi.org/10.1088/1742-6596/999/1/012004. ieee: N. Camus et al., “Experimental evidence for Wigner’s tunneling time,” presented at the Annual International Laser Physics Workshop LPHYS, Kazan, Russian Federation, 2017, vol. 999, no. 1. ista: 'Camus N, Yakaboylu E, Fechner L, Klaiber M, Laux M, Mi Y, Hatsagortsyan K, Pfeifer T, Keitel C, Moshammer R. 2017. Experimental evidence for Wigner’s tunneling time. Annual International Laser Physics Workshop LPHYS, Journal of Physics: Conference Series, vol. 999, 012004.' mla: Camus, Nicolas, et al. Experimental Evidence for Wigner’s Tunneling Time. Vol. 999, no. 1, 012004, American Physical Society, 2017, doi:10.1088/1742-6596/999/1/012004. short: N. Camus, E. Yakaboylu, L. Fechner, M. Klaiber, M. Laux, Y. Mi, K. Hatsagortsyan, T. Pfeifer, C. Keitel, R. Moshammer, in:, American Physical Society, 2017. conference: end_date: 2017-08-21 location: Kazan, Russian Federation name: Annual International Laser Physics Workshop LPHYS start_date: 2017-08-17 date_created: 2018-12-11T11:45:46Z date_published: 2017-07-14T00:00:00Z date_updated: 2023-02-23T12:36:07Z day: '14' ddc: - '530' department: - _id: MiLe doi: 10.1088/1742-6596/999/1/012004 external_id: arxiv: - '1611.03701' file: - access_level: open_access checksum: 6e70b525a84f6d5fb175c48e9f5cb59a content_type: application/pdf creator: dernst date_created: 2019-01-22T08:34:10Z date_updated: 2020-07-14T12:46:00Z file_id: '5871' file_name: 2017_Physics_Camus.pdf file_size: 949321 relation: main_file file_date_updated: 2020-07-14T12:46:00Z has_accepted_license: '1' intvolume: ' 999' issue: '1' language: - iso: eng month: '07' oa: 1 oa_version: Published Version publication_identifier: issn: - '17426588' publication_status: published publisher: American Physical Society publist_id: '7552' quality_controlled: '1' related_material: record: - id: '6013' relation: later_version status: public scopus_import: 1 status: public title: Experimental evidence for Wigner's tunneling time tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: conference user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 999 year: '2017' ... --- _id: '6013' abstract: - lang: eng text: The first hundred attoseconds of the electron dynamics during strong field tunneling ionization are investigated. We quantify theoretically how the electron’s classical trajectories in the continuum emerge from the tunneling process and test the results with those achieved in parallel from attoclock measurements. An especially high sensitivity on the tunneling barrier is accomplished here by comparing the momentum distributions of two atomic species of slightly deviating atomic potentials (argon and krypton) being ionized under absolutely identical conditions with near-infrared laser pulses (1300 nm). The agreement between experiment and theory provides clear evidence for a nonzero tunneling time delay and a nonvanishing longitudinal momentum of the electron at the “tunnel exit.” article_number: '023201' author: - first_name: Nicolas full_name: Camus, Nicolas last_name: Camus - first_name: Enderalp full_name: Yakaboylu, Enderalp id: 38CB71F6-F248-11E8-B48F-1D18A9856A87 last_name: Yakaboylu orcid: 0000-0001-5973-0874 - first_name: Lutz full_name: Fechner, Lutz last_name: Fechner - first_name: Michael full_name: Klaiber, Michael last_name: Klaiber - first_name: Martin full_name: Laux, Martin last_name: Laux - first_name: Yonghao full_name: Mi, Yonghao last_name: Mi - first_name: Karen Z. full_name: Hatsagortsyan, Karen Z. last_name: Hatsagortsyan - first_name: Thomas full_name: Pfeifer, Thomas last_name: Pfeifer - first_name: Christoph H. full_name: Keitel, Christoph H. last_name: Keitel - first_name: Robert full_name: Moshammer, Robert last_name: Moshammer citation: ama: Camus N, Yakaboylu E, Fechner L, et al. Experimental evidence for quantum tunneling time. Physical Review Letters. 2017;119(2). doi:10.1103/PhysRevLett.119.023201 apa: Camus, N., Yakaboylu, E., Fechner, L., Klaiber, M., Laux, M., Mi, Y., … Moshammer, R. (2017). Experimental evidence for quantum tunneling time. Physical Review Letters. American Physical Society. https://doi.org/10.1103/PhysRevLett.119.023201 chicago: Camus, Nicolas, Enderalp Yakaboylu, Lutz Fechner, Michael Klaiber, Martin Laux, Yonghao Mi, Karen Z. Hatsagortsyan, Thomas Pfeifer, Christoph H. Keitel, and Robert Moshammer. “Experimental Evidence for Quantum Tunneling Time.” Physical Review Letters. American Physical Society, 2017. https://doi.org/10.1103/PhysRevLett.119.023201. ieee: N. Camus et al., “Experimental evidence for quantum tunneling time,” Physical Review Letters, vol. 119, no. 2. American Physical Society, 2017. ista: Camus N, Yakaboylu E, Fechner L, Klaiber M, Laux M, Mi Y, Hatsagortsyan KZ, Pfeifer T, Keitel CH, Moshammer R. 2017. Experimental evidence for quantum tunneling time. Physical Review Letters. 119(2), 023201. mla: Camus, Nicolas, et al. “Experimental Evidence for Quantum Tunneling Time.” Physical Review Letters, vol. 119, no. 2, 023201, American Physical Society, 2017, doi:10.1103/PhysRevLett.119.023201. short: N. Camus, E. Yakaboylu, L. Fechner, M. Klaiber, M. Laux, Y. Mi, K.Z. Hatsagortsyan, T. Pfeifer, C.H. Keitel, R. Moshammer, Physical Review Letters 119 (2017). date_created: 2019-02-14T15:24:13Z date_published: 2017-07-14T00:00:00Z date_updated: 2023-02-23T11:13:36Z day: '14' department: - _id: MiLe doi: 10.1103/PhysRevLett.119.023201 external_id: arxiv: - '1611.03701' intvolume: ' 119' issue: '2' language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/1611.03701 month: '07' oa: 1 oa_version: Preprint publication: Physical Review Letters publication_identifier: eissn: - 1079-7114 issn: - 0031-9007 publication_status: published publisher: American Physical Society quality_controlled: '1' related_material: record: - id: '313' relation: earlier_version status: public scopus_import: 1 status: public title: Experimental evidence for quantum tunneling time type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 119 year: '2017' ... --- _id: '605' abstract: - lang: eng text: 'Position based cryptography (PBC), proposed in the seminal work of Chandran, Goyal, Moriarty, and Ostrovsky (SIAM J. Computing, 2014), aims at constructing cryptographic schemes in which the identity of the user is his geographic position. Chandran et al. construct PBC schemes for secure positioning and position-based key agreement in the bounded-storage model (Maurer, J. Cryptology, 1992). Apart from bounded memory, their security proofs need a strong additional restriction on the power of the adversary: he cannot compute joint functions of his inputs. Removing this assumption is left as an open problem. We show that an answer to this question would resolve a long standing open problem in multiparty communication complexity: finding a function that is hard to compute with low communication complexity in the simultaneous message model, but easy to compute in the fully adaptive model. On a more positive side: we also show some implications in the other direction, i.e.: we prove that lower bounds on the communication complexity of certain multiparty problems imply existence of PBC primitives. Using this result we then show two attractive ways to “bypass” our hardness result: the first uses the random oracle model, the second weakens the locality requirement in the bounded-storage model to online computability. The random oracle construction is arguably one of the simplest proposed so far in this area. Our results indicate that constructing improved provably secure protocols for PBC requires a better understanding of multiparty communication complexity. This is yet another example where negative results in one area (in our case: lower bounds in multiparty communication complexity) can be used to construct secure cryptographic schemes.' alternative_title: - LNCS author: - first_name: Joshua full_name: Brody, Joshua last_name: Brody - first_name: Stefan full_name: Dziembowski, Stefan last_name: Dziembowski - first_name: Sebastian full_name: Faust, Sebastian last_name: Faust - first_name: Krzysztof Z full_name: Pietrzak, Krzysztof Z id: 3E04A7AA-F248-11E8-B48F-1D18A9856A87 last_name: Pietrzak orcid: 0000-0002-9139-1654 citation: ama: 'Brody J, Dziembowski S, Faust S, Pietrzak KZ. Position based cryptography and multiparty communication complexity. In: Kalai Y, Reyzin L, eds. Vol 10677. Springer; 2017:56-81. doi:10.1007/978-3-319-70500-2_3' apa: 'Brody, J., Dziembowski, S., Faust, S., & Pietrzak, K. Z. (2017). Position based cryptography and multiparty communication complexity. In Y. Kalai & L. Reyzin (Eds.) (Vol. 10677, pp. 56–81). Presented at the TCC: Theory of Cryptography Conference, Baltimore, MD, United States: Springer. https://doi.org/10.1007/978-3-319-70500-2_3' chicago: Brody, Joshua, Stefan Dziembowski, Sebastian Faust, and Krzysztof Z Pietrzak. “Position Based Cryptography and Multiparty Communication Complexity.” edited by Yael Kalai and Leonid Reyzin, 10677:56–81. Springer, 2017. https://doi.org/10.1007/978-3-319-70500-2_3. ieee: 'J. Brody, S. Dziembowski, S. Faust, and K. Z. Pietrzak, “Position based cryptography and multiparty communication complexity,” presented at the TCC: Theory of Cryptography Conference, Baltimore, MD, United States, 2017, vol. 10677, pp. 56–81.' ista: 'Brody J, Dziembowski S, Faust S, Pietrzak KZ. 2017. Position based cryptography and multiparty communication complexity. TCC: Theory of Cryptography Conference, LNCS, vol. 10677, 56–81.' mla: Brody, Joshua, et al. Position Based Cryptography and Multiparty Communication Complexity. Edited by Yael Kalai and Leonid Reyzin, vol. 10677, Springer, 2017, pp. 56–81, doi:10.1007/978-3-319-70500-2_3. short: J. Brody, S. Dziembowski, S. Faust, K.Z. Pietrzak, in:, Y. Kalai, L. Reyzin (Eds.), Springer, 2017, pp. 56–81. conference: end_date: 2017-11-15 location: Baltimore, MD, United States name: 'TCC: Theory of Cryptography Conference' start_date: 2017-11-12 date_created: 2018-12-11T11:47:27Z date_published: 2017-11-05T00:00:00Z date_updated: 2021-01-12T08:05:53Z day: '05' department: - _id: KrPi doi: 10.1007/978-3-319-70500-2_3 ec_funded: 1 editor: - first_name: Yael full_name: Kalai, Yael last_name: Kalai - first_name: Leonid full_name: Reyzin, Leonid last_name: Reyzin intvolume: ' 10677' language: - iso: eng main_file_link: - open_access: '1' url: https://eprint.iacr.org/2016/536 month: '11' oa: 1 oa_version: Submitted Version page: 56 - 81 project: - _id: 258AA5B2-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '682815' name: Teaching Old Crypto New Tricks publication_identifier: isbn: - 978-331970499-9 publication_status: published publisher: Springer publist_id: '7200' quality_controlled: '1' scopus_import: 1 status: public title: Position based cryptography and multiparty communication complexity type: conference user_id: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87 volume: 10677 year: '2017' ... --- _id: '604' abstract: - lang: eng text: In several settings of physics and chemistry one has to deal with molecules interacting with some kind of an external environment, be it a gas, a solution, or a crystal surface. Understanding molecular processes in the presence of such a many-particle bath is inherently challenging, and usually requires large-scale numerical computations. Here, we present an alternative approach to the problem, based on the notion of the angulon quasiparticle. We show that molecules rotating inside superfluid helium nanodroplets and Bose–Einstein condensates form angulons, and therefore can be described by straightforward solutions of a simple microscopic Hamiltonian. Casting the problem in the language of angulons allows us not only to greatly simplify it, but also to gain insights into the origins of the observed phenomena and to make predictions for future experimental studies. alternative_title: - Theoretical and Computational Chemistry Series author: - first_name: Mikhail full_name: Lemeshko, Mikhail id: 37CB05FA-F248-11E8-B48F-1D18A9856A87 last_name: Lemeshko orcid: 0000-0002-6990-7802 - first_name: Richard full_name: Schmidt, Richard last_name: Schmidt citation: ama: 'Lemeshko M, Schmidt R. Molecular impurities interacting with a many-particle environment: From ultracold gases to helium nanodroplets. In: Dulieu O, Osterwalder A, eds. Cold Chemistry: Molecular Scattering and Reactivity Near Absolute Zero . Vol 11. Theoretical and Computational Chemistry Series. The Royal Society of Chemistry; 2017:444-495. doi:10.1039/9781782626800-00444' apa: 'Lemeshko, M., & Schmidt, R. (2017). Molecular impurities interacting with a many-particle environment: From ultracold gases to helium nanodroplets. In O. Dulieu & A. Osterwalder (Eds.), Cold Chemistry: Molecular Scattering and Reactivity Near Absolute Zero (Vol. 11, pp. 444–495). The Royal Society of Chemistry. https://doi.org/10.1039/9781782626800-00444' chicago: 'Lemeshko, Mikhail, and Richard Schmidt. “Molecular Impurities Interacting with a Many-Particle Environment: From Ultracold Gases to Helium Nanodroplets.” In Cold Chemistry: Molecular Scattering and Reactivity Near Absolute Zero , edited by Oliver Dulieu and Andreas Osterwalder, 11:444–95. Theoretical and Computational Chemistry Series. The Royal Society of Chemistry, 2017. https://doi.org/10.1039/9781782626800-00444.' ieee: 'M. Lemeshko and R. Schmidt, “Molecular impurities interacting with a many-particle environment: From ultracold gases to helium nanodroplets,” in Cold Chemistry: Molecular Scattering and Reactivity Near Absolute Zero , vol. 11, O. Dulieu and A. Osterwalder, Eds. The Royal Society of Chemistry, 2017, pp. 444–495.' ista: 'Lemeshko M, Schmidt R. 2017.Molecular impurities interacting with a many-particle environment: From ultracold gases to helium nanodroplets. In: Cold Chemistry: Molecular Scattering and Reactivity Near Absolute Zero . Theoretical and Computational Chemistry Series, vol. 11, 444–495.' mla: 'Lemeshko, Mikhail, and Richard Schmidt. “Molecular Impurities Interacting with a Many-Particle Environment: From Ultracold Gases to Helium Nanodroplets.” Cold Chemistry: Molecular Scattering and Reactivity Near Absolute Zero , edited by Oliver Dulieu and Andreas Osterwalder, vol. 11, The Royal Society of Chemistry, 2017, pp. 444–95, doi:10.1039/9781782626800-00444.' short: 'M. Lemeshko, R. Schmidt, in:, O. Dulieu, A. Osterwalder (Eds.), Cold Chemistry: Molecular Scattering and Reactivity Near Absolute Zero , The Royal Society of Chemistry, 2017, pp. 444–495.' date_created: 2018-12-11T11:47:27Z date_published: 2017-12-14T00:00:00Z date_updated: 2021-01-12T08:05:50Z day: '14' department: - _id: MiLe doi: 10.1039/9781782626800-00444 editor: - first_name: Oliver full_name: Dulieu, Oliver last_name: Dulieu - first_name: Andreas full_name: Osterwalder, Andreas last_name: Osterwalder intvolume: ' 11' language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/1703.06753 month: '12' oa: 1 oa_version: Submitted Version page: 444 - 495 publication: 'Cold Chemistry: Molecular Scattering and Reactivity Near Absolute Zero ' publication_identifier: issn: - '20413181' publication_status: published publisher: The Royal Society of Chemistry publist_id: '7201' quality_controlled: '1' scopus_import: 1 series_title: Theoretical and Computational Chemistry Series status: public title: 'Molecular impurities interacting with a many-particle environment: From ultracold gases to helium nanodroplets' type: book_chapter user_id: 4435EBFC-F248-11E8-B48F-1D18A9856A87 volume: 11 year: '2017' ...