--- _id: '798' abstract: - lang: eng text: Nonreciprocal circuit elements form an integral part of modern measurement and communication systems. Mathematically they require breaking of time-reversal symmetry, typically achieved using magnetic materials and more recently using the quantum Hall effect, parametric permittivity modulation or Josephson nonlinearities. Here we demonstrate an on-chip magnetic-free circulator based on reservoir-engineered electromechanic interactions. Directional circulation is achieved with controlled phase-sensitive interference of six distinct electro-mechanical signal conversion paths. The presented circulator is compact, its silicon-on-insulator platform is compatible with both superconducting qubits and silicon photonics, and its noise performance is close to the quantum limit. With a high dynamic range, a tunable bandwidth of up to 30 MHz and an in situ reconfigurability as beam splitter or wavelength converter, it could pave the way for superconducting qubit processors with multiplexed on-chip signal processing and readout. article_number: '1304' article_processing_charge: Yes (in subscription journal) author: - first_name: Shabir full_name: Barzanjeh, Shabir id: 2D25E1F6-F248-11E8-B48F-1D18A9856A87 last_name: Barzanjeh orcid: 0000-0003-0415-1423 - first_name: Matthias full_name: Wulf, Matthias id: 45598606-F248-11E8-B48F-1D18A9856A87 last_name: Wulf orcid: 0000-0001-6613-1378 - first_name: Matilda full_name: Peruzzo, Matilda id: 3F920B30-F248-11E8-B48F-1D18A9856A87 last_name: Peruzzo orcid: 0000-0002-3415-4628 - first_name: Mahmoud full_name: Kalaee, Mahmoud last_name: Kalaee - first_name: Paul full_name: Dieterle, Paul last_name: Dieterle - first_name: Oskar full_name: Painter, Oskar last_name: Painter - first_name: Johannes M full_name: Fink, Johannes M id: 4B591CBA-F248-11E8-B48F-1D18A9856A87 last_name: Fink orcid: 0000-0001-8112-028X citation: ama: Barzanjeh S, Wulf M, Peruzzo M, et al. Mechanical on chip microwave circulator. Nature Communications. 2017;8(1). doi:10.1038/s41467-017-01304-x apa: Barzanjeh, S., Wulf, M., Peruzzo, M., Kalaee, M., Dieterle, P., Painter, O., & Fink, J. M. (2017). Mechanical on chip microwave circulator. Nature Communications. Nature Publishing Group. https://doi.org/10.1038/s41467-017-01304-x chicago: Barzanjeh, Shabir, Matthias Wulf, Matilda Peruzzo, Mahmoud Kalaee, Paul Dieterle, Oskar Painter, and Johannes M Fink. “Mechanical on Chip Microwave Circulator.” Nature Communications. Nature Publishing Group, 2017. https://doi.org/10.1038/s41467-017-01304-x. ieee: S. Barzanjeh et al., “Mechanical on chip microwave circulator,” Nature Communications, vol. 8, no. 1. Nature Publishing Group, 2017. ista: Barzanjeh S, Wulf M, Peruzzo M, Kalaee M, Dieterle P, Painter O, Fink JM. 2017. Mechanical on chip microwave circulator. Nature Communications. 8(1), 1304. mla: Barzanjeh, Shabir, et al. “Mechanical on Chip Microwave Circulator.” Nature Communications, vol. 8, no. 1, 1304, Nature Publishing Group, 2017, doi:10.1038/s41467-017-01304-x. short: S. Barzanjeh, M. Wulf, M. Peruzzo, M. Kalaee, P. Dieterle, O. Painter, J.M. Fink, Nature Communications 8 (2017). date_created: 2018-12-11T11:48:33Z date_published: 2017-10-16T00:00:00Z date_updated: 2023-09-27T12:11:28Z day: '16' ddc: - '539' department: - _id: JoFi doi: 10.1038/s41467-017-01304-x ec_funded: 1 external_id: isi: - '000412999700021' file: - access_level: open_access checksum: b68dafa71d1834c23b742cd9987a3d5f content_type: application/pdf creator: system date_created: 2018-12-12T10:15:25Z date_updated: 2020-07-14T12:48:06Z file_id: '5145' file_name: IST-2017-867-v1+1_s41467-017-01304-x.pdf file_size: 1467696 relation: main_file file_date_updated: 2020-07-14T12:48:06Z has_accepted_license: '1' intvolume: ' 8' isi: 1 issue: '1' language: - iso: eng month: '10' oa: 1 oa_version: Published Version project: - _id: 257EB838-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '732894' name: Hybrid Optomechanical Technologies - _id: 258047B6-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '707438' name: 'Microwave-to-Optical Quantum Link: Quantum Teleportation and Quantum Illumination with cavity Optomechanics' publication: Nature Communications publication_identifier: issn: - '20411723' publication_status: published publisher: Nature Publishing Group publist_id: '6855' pubrep_id: '867' quality_controlled: '1' scopus_import: '1' status: public title: Mechanical on chip microwave circulator 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: journal_article user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1 volume: 8 year: '2017' ... --- _id: '791' abstract: - lang: eng text: 'Consider the following random process: we are given n queues, into which elements of increasing labels are inserted uniformly at random. To remove an element, we pick two queues at random, and remove the element of lower label (higher priority) among the two. The cost of a removal is the rank of the label removed, among labels still present in any of the queues, that is, the distance from the optimal choice at each step. Variants of this strategy are prevalent in state-of-the-art concurrent priority queue implementations. Nonetheless, it is not known whether such implementations provide any rank guarantees, even in a sequential model. We answer this question, showing that this strategy provides surprisingly strong guarantees: Although the single-choice process, where we always insert and remove from a single randomly chosen queue, has degrading cost, going to infinity as we increase the number of steps, in the two choice process, the expected rank of a removed element is O(n) while the expected worst-case cost is O(n log n). These bounds are tight, and hold irrespective of the number of steps for which we run the process. The argument is based on a new technical connection between "heavily loaded" balls-into-bins processes and priority scheduling. Our analytic results inspire a new concurrent priority queue implementation, which improves upon the state of the art in terms of practical performance.' article_processing_charge: No author: - first_name: Dan-Adrian full_name: Alistarh, Dan-Adrian id: 4A899BFC-F248-11E8-B48F-1D18A9856A87 last_name: Alistarh orcid: 0000-0003-3650-940X - first_name: Justin full_name: Kopinsky, Justin last_name: Kopinsky - first_name: Jerry full_name: Li, Jerry last_name: Li - first_name: Giorgi full_name: Nadiradze, Giorgi id: 3279A00C-F248-11E8-B48F-1D18A9856A87 last_name: Nadiradze orcid: 0000-0001-5634-0731 citation: ama: 'Alistarh D-A, Kopinsky J, Li J, Nadiradze G. The power of choice in priority scheduling. In: Proceedings of the ACM Symposium on Principles of Distributed Computing. Vol Part F129314. ACM; 2017:283-292. doi:10.1145/3087801.3087810' apa: 'Alistarh, D.-A., Kopinsky, J., Li, J., & Nadiradze, G. (2017). The power of choice in priority scheduling. In Proceedings of the ACM Symposium on Principles of Distributed Computing (Vol. Part F129314, pp. 283–292). Washington, WA, USA: ACM. https://doi.org/10.1145/3087801.3087810' chicago: Alistarh, Dan-Adrian, Justin Kopinsky, Jerry Li, and Giorgi Nadiradze. “The Power of Choice in Priority Scheduling.” In Proceedings of the ACM Symposium on Principles of Distributed Computing, Part F129314:283–92. ACM, 2017. https://doi.org/10.1145/3087801.3087810. ieee: D.-A. Alistarh, J. Kopinsky, J. Li, and G. Nadiradze, “The power of choice in priority scheduling,” in Proceedings of the ACM Symposium on Principles of Distributed Computing, Washington, WA, USA, 2017, vol. Part F129314, pp. 283–292. ista: 'Alistarh D-A, Kopinsky J, Li J, Nadiradze G. 2017. The power of choice in priority scheduling. Proceedings of the ACM Symposium on Principles of Distributed Computing. PODC: Principles of Distributed Computing vol. Part F129314, 283–292.' mla: Alistarh, Dan-Adrian, et al. “The Power of Choice in Priority Scheduling.” Proceedings of the ACM Symposium on Principles of Distributed Computing, vol. Part F129314, ACM, 2017, pp. 283–92, doi:10.1145/3087801.3087810. short: D.-A. Alistarh, J. Kopinsky, J. Li, G. Nadiradze, in:, Proceedings of the ACM Symposium on Principles of Distributed Computing, ACM, 2017, pp. 283–292. conference: end_date: 2017-07-27 location: Washington, WA, USA name: 'PODC: Principles of Distributed Computing' start_date: 2017-07-25 date_created: 2018-12-11T11:48:31Z date_published: 2017-07-26T00:00:00Z date_updated: 2023-09-27T12:17:59Z day: '26' department: - _id: DaAl doi: 10.1145/3087801.3087810 external_id: isi: - '000462995000035' isi: 1 language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/1706.04178 month: '07' oa: 1 oa_version: Submitted Version page: 283 - 292 publication: Proceedings of the ACM Symposium on Principles of Distributed Computing publication_identifier: isbn: - 978-145034992-5 publication_status: published publisher: ACM publist_id: '6864' quality_controlled: '1' scopus_import: '1' status: public title: The power of choice in priority scheduling type: conference user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1 volume: Part F129314 year: '2017' ... --- _id: '792' abstract: - lang: eng text: The chaotic dynamics of low-dimensional systems, such as Lorenz or Rössler flows, is guided by the infinity of periodic orbits embedded in their strange attractors. Whether this is also the case for the infinite-dimensional dynamics of Navier–Stokes equations has long been speculated, and is a topic of ongoing study. Periodic and relative periodic solutions have been shown to be involved in transitions to turbulence. Their relevance to turbulent dynamics – specifically, whether periodic orbits play the same role in high-dimensional nonlinear systems like the Navier–Stokes equations as they do in lower-dimensional systems – is the focus of the present investigation. We perform here a detailed study of pipe flow relative periodic orbits with energies and mean dissipations close to turbulent values. We outline several approaches to reduction of the translational symmetry of the system. We study pipe flow in a minimal computational cell at Re=2500, and report a library of invariant solutions found with the aid of the method of slices. Detailed study of the unstable manifolds of a sample of these solutions is consistent with the picture that relative periodic orbits are embedded in the chaotic saddle and that they guide the turbulent dynamics. article_processing_charge: No author: - first_name: Nazmi B full_name: Budanur, Nazmi B id: 3EA1010E-F248-11E8-B48F-1D18A9856A87 last_name: Budanur orcid: 0000-0003-0423-5010 - first_name: Kimberly full_name: Short, Kimberly last_name: Short - first_name: Mohammad full_name: Farazmand, Mohammad last_name: Farazmand - first_name: Ashley full_name: Willis, Ashley last_name: Willis - first_name: Predrag full_name: Cvitanović, Predrag last_name: Cvitanović citation: ama: Budanur NB, Short K, Farazmand M, Willis A, Cvitanović P. Relative periodic orbits form the backbone of turbulent pipe flow. Journal of Fluid Mechanics. 2017;833:274-301. doi:10.1017/jfm.2017.699 apa: Budanur, N. B., Short, K., Farazmand, M., Willis, A., & Cvitanović, P. (2017). Relative periodic orbits form the backbone of turbulent pipe flow. Journal of Fluid Mechanics. Cambridge University Press. https://doi.org/10.1017/jfm.2017.699 chicago: Budanur, Nazmi B, Kimberly Short, Mohammad Farazmand, Ashley Willis, and Predrag Cvitanović. “Relative Periodic Orbits Form the Backbone of Turbulent Pipe Flow.” Journal of Fluid Mechanics. Cambridge University Press, 2017. https://doi.org/10.1017/jfm.2017.699. ieee: N. B. Budanur, K. Short, M. Farazmand, A. Willis, and P. Cvitanović, “Relative periodic orbits form the backbone of turbulent pipe flow,” Journal of Fluid Mechanics, vol. 833. Cambridge University Press, pp. 274–301, 2017. ista: Budanur NB, Short K, Farazmand M, Willis A, Cvitanović P. 2017. Relative periodic orbits form the backbone of turbulent pipe flow. Journal of Fluid Mechanics. 833, 274–301. mla: Budanur, Nazmi B., et al. “Relative Periodic Orbits Form the Backbone of Turbulent Pipe Flow.” Journal of Fluid Mechanics, vol. 833, Cambridge University Press, 2017, pp. 274–301, doi:10.1017/jfm.2017.699. short: N.B. Budanur, K. Short, M. Farazmand, A. Willis, P. Cvitanović, Journal of Fluid Mechanics 833 (2017) 274–301. date_created: 2018-12-11T11:48:32Z date_published: 2017-12-25T00:00:00Z date_updated: 2023-09-27T12:17:35Z day: '25' department: - _id: BjHo doi: 10.1017/jfm.2017.699 external_id: isi: - '000414641700001' intvolume: ' 833' isi: 1 language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/1705.03720 month: '12' oa: 1 oa_version: Submitted Version page: 274 - 301 project: - _id: 25636330-B435-11E9-9278-68D0E5697425 grant_number: 11-NSF-1070 name: ROOTS Genome-wide Analysis of Root Traits publication: Journal of Fluid Mechanics publication_identifier: issn: - '00221120' publication_status: published publisher: Cambridge University Press publist_id: '6862' quality_controlled: '1' scopus_import: '1' status: public title: Relative periodic orbits form the backbone of turbulent pipe flow type: journal_article user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1 volume: 833 year: '2017' ... --- _id: '796' abstract: - lang: eng text: We present the fabrication and characterization of an aluminum transmon qubit on a silicon-on-insulator substrate. Key to the qubit fabrication is the use of an anhydrous hydrofluoric vapor process which selectively removes the lossy silicon oxide buried underneath the silicon device layer. For a 5.6 GHz qubit measured dispersively by a 7.1 GHz resonator, we find T1 = 3.5 μs and T∗2 = 2.2 μs. This process in principle permits the co-fabrication of silicon photonic and mechanical elements, providing a route towards chip-scale integration of electro-opto-mechanical transducers for quantum networking of superconducting microwave quantum circuits. The additional processing steps are compatible with established fabrication techniques for aluminum transmon qubits on silicon. acknowledgement: This work was supported by the AFOSR MURI Quantum Photonic Matter (Grant No. 16RT0696), the AFOSR MURI Wiring Quantum Networks with Mechanical Transducers (Grant No. FA9550-15-1-0015), the Institute for Quantum Information and Matter, an NSF Physics Frontiers Center (Grant No. PHY-1125565) with the support of the Gordon and Betty Moore Foundation, and the Kavli Nanoscience Institute at Caltech. A.J.K. acknowledges the IQIM Postdoctoral Fellowship. article_number: '042603' article_processing_charge: No author: - first_name: Andrew J full_name: Keller, Andrew J last_name: Keller - first_name: Paul full_name: Dieterle, Paul last_name: Dieterle - first_name: Michael full_name: Fang, Michael last_name: Fang - first_name: Brett full_name: Berger, Brett last_name: Berger - first_name: Johannes M full_name: Fink, Johannes M id: 4B591CBA-F248-11E8-B48F-1D18A9856A87 last_name: Fink orcid: 0000-0001-8112-028X - first_name: Oskar full_name: Painter, Oskar last_name: Painter citation: ama: Keller AJ, Dieterle P, Fang M, Berger B, Fink JM, Painter O. Al transmon qubits on silicon on insulator for quantum device integration. Applied Physics Letters. 2017;111(4). doi:10.1063/1.4994661 apa: Keller, A. J., Dieterle, P., Fang, M., Berger, B., Fink, J. M., & Painter, O. (2017). Al transmon qubits on silicon on insulator for quantum device integration. Applied Physics Letters. American Institute of Physics. https://doi.org/10.1063/1.4994661 chicago: Keller, Andrew J, Paul Dieterle, Michael Fang, Brett Berger, Johannes M Fink, and Oskar Painter. “Al Transmon Qubits on Silicon on Insulator for Quantum Device Integration.” Applied Physics Letters. American Institute of Physics, 2017. https://doi.org/10.1063/1.4994661. ieee: A. J. Keller, P. Dieterle, M. Fang, B. Berger, J. M. Fink, and O. Painter, “Al transmon qubits on silicon on insulator for quantum device integration,” Applied Physics Letters, vol. 111, no. 4. American Institute of Physics, 2017. ista: Keller AJ, Dieterle P, Fang M, Berger B, Fink JM, Painter O. 2017. Al transmon qubits on silicon on insulator for quantum device integration. Applied Physics Letters. 111(4), 042603. mla: Keller, Andrew J., et al. “Al Transmon Qubits on Silicon on Insulator for Quantum Device Integration.” Applied Physics Letters, vol. 111, no. 4, 042603, American Institute of Physics, 2017, doi:10.1063/1.4994661. short: A.J. Keller, P. Dieterle, M. Fang, B. Berger, J.M. Fink, O. Painter, Applied Physics Letters 111 (2017). date_created: 2018-12-11T11:48:33Z date_published: 2017-07-01T00:00:00Z date_updated: 2023-09-27T12:13:36Z day: '01' department: - _id: JoFi doi: 10.1063/1.4994661 external_id: isi: - '000406779700031' intvolume: ' 111' isi: 1 issue: '4' language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/1703.10195 month: '07' oa: 1 oa_version: Submitted Version publication: Applied Physics Letters publication_identifier: issn: - '00036951' publication_status: published publisher: American Institute of Physics publist_id: '6857' quality_controlled: '1' scopus_import: '1' status: public title: Al transmon qubits on silicon on insulator for quantum device integration type: journal_article user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1 volume: 111 year: '2017' ... --- _id: '793' abstract: - lang: eng text: 'Let P be a finite point set in the plane. A cordinary triangle in P is a subset of P consisting of three non-collinear points such that each of the three lines determined by the three points contains at most c points of P . Motivated by a question of Erdös, and answering a question of de Zeeuw, we prove that there exists a constant c > 0such that P contains a c-ordinary triangle, provided that P is not contained in the union of two lines. Furthermore, the number of c-ordinary triangles in P is Ω(| P |). ' article_processing_charge: No author: - first_name: Radoslav full_name: Fulek, Radoslav id: 39F3FFE4-F248-11E8-B48F-1D18A9856A87 last_name: Fulek orcid: 0000-0001-8485-1774 - first_name: Hossein full_name: Mojarrad, Hossein last_name: Mojarrad - first_name: Márton full_name: Naszódi, Márton last_name: Naszódi - first_name: József full_name: Solymosi, József last_name: Solymosi - first_name: Sebastian full_name: Stich, Sebastian last_name: Stich - first_name: May full_name: Szedlák, May last_name: Szedlák citation: ama: 'Fulek R, Mojarrad H, Naszódi M, Solymosi J, Stich S, Szedlák M. On the existence of ordinary triangles. Computational Geometry: Theory and Applications. 2017;66:28-31. doi:10.1016/j.comgeo.2017.07.002' apa: 'Fulek, R., Mojarrad, H., Naszódi, M., Solymosi, J., Stich, S., & Szedlák, M. (2017). On the existence of ordinary triangles. Computational Geometry: Theory and Applications. Elsevier. https://doi.org/10.1016/j.comgeo.2017.07.002' chicago: 'Fulek, Radoslav, Hossein Mojarrad, Márton Naszódi, József Solymosi, Sebastian Stich, and May Szedlák. “On the Existence of Ordinary Triangles.” Computational Geometry: Theory and Applications. Elsevier, 2017. https://doi.org/10.1016/j.comgeo.2017.07.002.' ieee: 'R. Fulek, H. Mojarrad, M. Naszódi, J. Solymosi, S. Stich, and M. Szedlák, “On the existence of ordinary triangles,” Computational Geometry: Theory and Applications, vol. 66. Elsevier, pp. 28–31, 2017.' ista: 'Fulek R, Mojarrad H, Naszódi M, Solymosi J, Stich S, Szedlák M. 2017. On the existence of ordinary triangles. Computational Geometry: Theory and Applications. 66, 28–31.' mla: 'Fulek, Radoslav, et al. “On the Existence of Ordinary Triangles.” Computational Geometry: Theory and Applications, vol. 66, Elsevier, 2017, pp. 28–31, doi:10.1016/j.comgeo.2017.07.002.' short: 'R. Fulek, H. Mojarrad, M. Naszódi, J. Solymosi, S. Stich, M. Szedlák, Computational Geometry: Theory and Applications 66 (2017) 28–31.' date_created: 2018-12-11T11:48:32Z date_published: 2017-01-01T00:00:00Z date_updated: 2023-09-27T12:15:16Z day: '01' department: - _id: UlWa doi: 10.1016/j.comgeo.2017.07.002 ec_funded: 1 external_id: isi: - '000412039700003' intvolume: ' 66' isi: 1 language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/1701.08183 month: '01' oa: 1 oa_version: Submitted Version page: 28 - 31 project: - _id: 25681D80-B435-11E9-9278-68D0E5697425 call_identifier: FP7 grant_number: '291734' name: International IST Postdoc Fellowship Programme publication: 'Computational Geometry: Theory and Applications' publication_identifier: issn: - '09257721' publication_status: published publisher: Elsevier publist_id: '6861' quality_controlled: '1' status: public title: On the existence of ordinary triangles type: journal_article user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1 volume: 66 year: '2017' ...