From goran.l.johansson at chalmers.se Thu Mar 11 07:58:59 2021 From: goran.l.johansson at chalmers.se (=?utf-8?B?R8O2cmFuIEpvaGFuc3Nvbg==?=) Date: Thu, 11 Mar 2021 06:58:59 +0000 Subject: [All.non-board.wacqt] =?utf-8?q?Don=E2=80=99t_miss_the_WACQT_Qua?= =?utf-8?q?ntum_Software_Workshop_-_8-9th_of_April_online?= Message-ID: <3C634233-555E-4AC1-ACC5-DA721542736D@chalmers.se> Dear WACQT Colleague, What can a quantum software scientist do for you? Join our Quantum Software Workshop online at 8-9th of April to see many of the top names in the field and get a good overview of this topic. More information and registration at: https://www.chalmers.se/en/centres/wacqt/calendar/Pages/ttp-qs.aspx In connection with this workshop we will also announce a call for a WACQT Assistant Professor position in Quantum Software, to be placed at either the department of Computer Science and Engineering or the department of Mathematical Science at Chalmers. Looking forward to seeing you at the workshop! Cheers Giulia and G?ran From linda.branell at chalmers.se Fri Mar 19 13:13:20 2021 From: linda.branell at chalmers.se (=?iso-8859-1?Q?Linda_Br=E5nell?=) Date: Fri, 19 Mar 2021 12:13:20 +0000 Subject: [All.non-board.wacqt] WACQT-KTH seminar on Hybrid Quantum Photonics with new Assoc. Professor Ali Elshaari - 29 March 09:15 Message-ID: Dear WACQT members, We are happy to announce that Dr. Ali Elshaari has accepted a position as an associate professor in experimental quantum photonics at KTH. and would like to invite you all to a joint KTH - WACQT seminar with him on March 29th 09.15-10.00 via ZOOM (https://kth-se.zoom.us/j/63003162627) . [Profile picture of Ali Elshaari]Speaker: Ali Elshaari, newly appointed Associate Professor in Experimental Quantum Photonics at Applied Physics Department, KTH. This is a position supported by the WACQT new faculty programme, and the seminar will be open also to everyone in the WACQT community and run as a joint Applied Physics-WACQT seminar. Title: Hybrid Quantum Photonics Abstract: Photons and quantum optical technology have been the main testing grounds for fundamental ideas of quantum science, though implementing quantum optics experiments beyond the single photon level brings about large increases in required resources. Recent development in photonic integrated quantum circuits has radically impacted the way we process quantum information and perform complex experiments. With the advancements of such circuits, we can potentially harness the full potential and unique properties of quantum systems. Monolithic approaches dominate the developed photonic platforms for quantum optical information processing. Despite their high technological advancement, such as silicon quantum photonics, due to decades of industrial development, they come with challenges, either inherent to the way the single photons are generated, or limitations in scaling up the process. Hybrid quantum photonic integration [1] is an emerging field, where different photonic materials are combined to potentially take advantage of the individual constituent materials and eliminate their drawbacks. We introduce our approach for realizing hybrid quantum photonic circuits, where we combine III-V quantum sources, silicon nitride photonics, piezo-electric crystals, and superconducting materials. We developed a pick and place technique to deterministically integrate on-demand nanowire single photon sources with silicon nitride waveguides [2, 3]. We show that we are able to reconfigure the photonic circuit and control the emission wavelength of a quantum source using strain-tuning [4]. Moreover, we build a full quantum transceiver consisting of a nanowire quantum dot source, a single stage ring resonator filter, and a waveguide-coupled superconducting nanowire single photon detector (SNSPD), all on a single chip [5]. Next, we present our recent results toward room temperature quantum integrated photonics, through integration of hexagonal boron nitride quantum emitters in silicon nitride waveguides [6]. Finally, we share our recent results on quantum light detectors. First, we address the challenge of multi-pixel integration of SNSPDs. We employ temporal multiplexing of detectors through dispersion engineering of the superconducting transmission line [7]. Second, we address the challenge of the limited thermal budget for configuring photonic circuits operated with superconducting devices. We realize heat-free routing then detection of single photons, all on-chip, using MEMS technology and SNSPDs [8]. References 1- Ali W. Elshaari, Wolfram Pernice, Kartik Srinivasan, Oliver Benson, Val Zwiller, "Hybrid integrated quantum photonic circuits" Nature Photonics, vol 14, 285-298 (2020) 2- Ali. W. Elshaari, I. Esmaeil Zadeh, A. Fognini, D. Dalacu, P. J. Poole, M. E. Reimer, V. Zwiller, and K. Jons, "On-chip single photon filtering and multiplexing in hybrid quantum photonic circuits", Nature Communications vol. 8, 379 (2017) 3- I. Esmaeil Zadeh*, Ali. W. Elshaari*, K. Jons, A. Fognini, D. Dalacu, P. J. Poole, M. E. Reimer, and V. Zwiller , "Deterministic integration of single photon sources in silicon based photonic circuits" " Nano Letters., vol. 16, pp. 2289-2294, (2016) 4- Ali W. Elshaari , Efe B?y?k?zer ,Iman Esmaeilzadeh, Thomas Lettner, Peng Zhao, Eva Sch?ll, Samuel Gyger, Michael E. Reimer, Dan Dalacu, Philip J. Poole, Klaus D. J?ns, Val Zwiller "Strain-tunable quantum integrated photonics", Nano Letters , vol 18(12) , 7969-7976 (2018) 5- R. Gourgues., I. EsmaeilZadeh, Ali W> Elshaari, G. Bulgarini, W. N. Los, J. Zichi, D. P. J. Dalacu, Poole, S. N. Dorenbos, V. Zwiller "Controlled integration of selected detectors and emitters in photonic integrated circuits", Optics Express, vol 27(3) , 3710-3716, (2019) 6- Ali W. Elshaari, Anas Skalli, Samuel Gyger, Martin Nurizzo, Lucas Schweickert, Iman Esmaeil Zadeh, Mikael Svedendahl, Stephan Steinhauer, Val Zwiller "Deterministic integration of hBN emitter in silicon nitride photonic waveguide" (Submitted) (2021) 7- Ali W. Elshaari, Adrian Iovan, Samuel Gyger, Iman Esmaeil Zadeh, Julien Zichi, Lily Yang, Stephan Steinhauer, and Val Zwiller, "Dispersion engineering of superconducting single-photon detectors for multi-pixel integration" APL Photonics, 5, 111301 (2020) (Featured article) 8- Samuel Gyger, Julien Zichi, Lucas Schweickert, Ali W Elshaari, Stephan Steinhauer, Saimon F Covre da Silva, Armando Rastelli, Val Zwiller, Klaus D J?ns, Carlos Errando-Herranz, "Reconfigurable quantum photonics with on-chip detectors" Nature Communications 1408, 12 (2021) The room on ZOOM will be open from 09.00. Most welcome! Oscar Tjernberg, Head of Applied Physics department and Katia Gallo, KTH representative in WACQT via ******************************************************* Med v?nlig h?lsning | Best regards Linda Br?nell Administrat?r |Administrator Inst. mikroteknologi och nanovetenskap | Dept of Microtechnology and Nanoscience +46(0)31 772 63 49 linda.branell at chalmers.se Chalmers tekniska h?gskola | Chalmers University of Technology (Bes?ksadress | Visiting address: Kemiv?gen 9) SE-412 96 G?TEBORG, Sweden www.chalmers.se -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: image001.jpg Type: image/jpeg Size: 13082 bytes Desc: image001.jpg URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: image003.jpg Type: image/jpeg Size: 4275 bytes Desc: image003.jpg URL: From linda.branell at chalmers.se Fri Mar 26 09:04:53 2021 From: linda.branell at chalmers.se (=?iso-8859-1?Q?Linda_Br=E5nell?=) Date: Fri, 26 Mar 2021 08:04:53 +0000 Subject: [All.non-board.wacqt] REMINDER: WACQT-KTH seminar on Hybrid Quantum Photonics with new Assoc. Professor Ali Elshaari - 29 March 09:15 Message-ID: Dear WACQT members, We are happy to announce that Dr. Ali Elshaari has accepted a position as an associate professor in experimental quantum photonics at KTH. and would like to invite you all to a joint KTH - WACQT seminar with him on March 29th 09.15-10.00 via ZOOM (https://kth-se.zoom.us/j/63003162627) . [Profile picture of Ali Elshaari]Speaker: Ali Elshaari, newly appointed Associate Professor in Experimental Quantum Photonics at Applied Physics Department, KTH. This is a position supported by the WACQT new faculty programme, and the seminar will be open also to everyone in the WACQT community and run as a joint Applied Physics-WACQT seminar. Title: Hybrid Quantum Photonics Abstract: Photons and quantum optical technology have been the main testing grounds for fundamental ideas of quantum science, though implementing quantum optics experiments beyond the single photon level brings about large increases in required resources. Recent development in photonic integrated quantum circuits has radically impacted the way we process quantum information and perform complex experiments. With the advancements of such circuits, we can potentially harness the full potential and unique properties of quantum systems. Monolithic approaches dominate the developed photonic platforms for quantum optical information processing. Despite their high technological advancement, such as silicon quantum photonics, due to decades of industrial development, they come with challenges, either inherent to the way the single photons are generated, or limitations in scaling up the process. Hybrid quantum photonic integration [1] is an emerging field, where different photonic materials are combined to potentially take advantage of the individual constituent materials and eliminate their drawbacks. We introduce our approach for realizing hybrid quantum photonic circuits, where we combine III-V quantum sources, silicon nitride photonics, piezo-electric crystals, and superconducting materials. We developed a pick and place technique to deterministically integrate on-demand nanowire single photon sources with silicon nitride waveguides [2, 3]. We show that we are able to reconfigure the photonic circuit and control the emission wavelength of a quantum source using strain-tuning [4]. Moreover, we build a full quantum transceiver consisting of a nanowire quantum dot source, a single stage ring resonator filter, and a waveguide-coupled superconducting nanowire single photon detector (SNSPD), all on a single chip [5]. Next, we present our recent results toward room temperature quantum integrated photonics, through integration of hexagonal boron nitride quantum emitters in silicon nitride waveguides [6]. Finally, we share our recent results on quantum light detectors. First, we address the challenge of multi-pixel integration of SNSPDs. We employ temporal multiplexing of detectors through dispersion engineering of the superconducting transmission line [7]. Second, we address the challenge of the limited thermal budget for configuring photonic circuits operated with superconducting devices. We realize heat-free routing then detection of single photons, all on-chip, using MEMS technology and SNSPDs [8]. References 1- Ali W. Elshaari, Wolfram Pernice, Kartik Srinivasan, Oliver Benson, Val Zwiller, "Hybrid integrated quantum photonic circuits" Nature Photonics, vol 14, 285-298 (2020) 2- Ali. W. Elshaari, I. Esmaeil Zadeh, A. Fognini, D. Dalacu, P. J. Poole, M. E. Reimer, V. Zwiller, and K. Jons, "On-chip single photon filtering and multiplexing in hybrid quantum photonic circuits", Nature Communications vol. 8, 379 (2017) 3- I. Esmaeil Zadeh*, Ali. W. Elshaari*, K. Jons, A. Fognini, D. Dalacu, P. J. Poole, M. E. Reimer, and V. Zwiller , "Deterministic integration of single photon sources in silicon based photonic circuits" " Nano Letters., vol. 16, pp. 2289-2294, (2016) 4- Ali W. Elshaari , Efe B?y?k?zer ,Iman Esmaeilzadeh, Thomas Lettner, Peng Zhao, Eva Sch?ll, Samuel Gyger, Michael E. Reimer, Dan Dalacu, Philip J. Poole, Klaus D. J?ns, Val Zwiller "Strain-tunable quantum integrated photonics", Nano Letters , vol 18(12) , 7969-7976 (2018) 5- R. Gourgues., I. EsmaeilZadeh, Ali W> Elshaari, G. Bulgarini, W. N. Los, J. Zichi, D. P. J. Dalacu, Poole, S. N. Dorenbos, V. Zwiller "Controlled integration of selected detectors and emitters in photonic integrated circuits", Optics Express, vol 27(3) , 3710-3716, (2019) 6- Ali W. Elshaari, Anas Skalli, Samuel Gyger, Martin Nurizzo, Lucas Schweickert, Iman Esmaeil Zadeh, Mikael Svedendahl, Stephan Steinhauer, Val Zwiller "Deterministic integration of hBN emitter in silicon nitride photonic waveguide" (Submitted) (2021) 7- Ali W. Elshaari, Adrian Iovan, Samuel Gyger, Iman Esmaeil Zadeh, Julien Zichi, Lily Yang, Stephan Steinhauer, and Val Zwiller, "Dispersion engineering of superconducting single-photon detectors for multi-pixel integration" APL Photonics, 5, 111301 (2020) (Featured article) 8- Samuel Gyger, Julien Zichi, Lucas Schweickert, Ali W Elshaari, Stephan Steinhauer, Saimon F Covre da Silva, Armando Rastelli, Val Zwiller, Klaus D J?ns, Carlos Errando-Herranz, "Reconfigurable quantum photonics with on-chip detectors" Nature Communications 1408, 12 (2021) The room on ZOOM will be open from 09.00. Most welcome! Oscar Tjernberg, Head of Applied Physics department and Katia Gallo, KTH representative in WACQT via ******************************************************* Med v?nlig h?lsning | Best regards Linda Br?nell Administrat?r |Administrator Inst. mikroteknologi och nanovetenskap | Dept of Microtechnology and Nanoscience +46(0)31 772 63 49 linda.branell at chalmers.se Chalmers tekniska h?gskola | Chalmers University of Technology (Bes?ksadress | Visiting address: Kemiv?gen 9) SE-412 96 G?TEBORG, Sweden www.chalmers.se -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: image001.jpg Type: image/jpeg Size: 13082 bytes Desc: image001.jpg URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: image003.jpg Type: image/jpeg Size: 4275 bytes Desc: image003.jpg URL: From linda.branell at chalmers.se Wed Mar 31 15:37:05 2021 From: linda.branell at chalmers.se (=?iso-8859-1?Q?Linda_Br=E5nell?=) Date: Wed, 31 Mar 2021 13:37:05 +0000 Subject: [All.non-board.wacqt] Invitation to WACQT workshops: 8-9 April on Quantum Software and 13-14 April on Enabling technologies and algorithms for quantum computing Message-ID: <957acd2807ba49848bb77a4ac3865978@chalmers.se> Dear WACQT Members, WACQT Quantum computing and simulation would like to invite you to two online workshops: 8-9 April: Quantum Software and Optimisation Talks by several well-renowned speakers will help create an interest and understanding for this field and its potential at Chalmers. We are also announcing an open tenure track position as an assistant professor in Quantum Software at Chalmers. 13-14 April: Enabling Technologies and Algorithms for Quantum Computing Keynote speakers: Prof. Steven Girvin, Yale Quantum Institute (chairman of WACQT's Scientific advisory board) Prof. William Oliver, MIT (also member of WACQT's SAB) Young researchers in the area of quantum computing, with an emphasis on superconducting circuits, will present their research. For more details and schedules, incl speakers and abstracts, please visit the links. Zoom links will be sent out to all registered participants. ******************************************************* Med v?nlig h?lsning | Best regards Linda Br?nell Administrat?r |Administrator Inst. mikroteknologi och nanovetenskap | Dept of Microtechnology and Nanoscience +46(0)31 772 63 49 linda.branell at chalmers.se Chalmers tekniska h?gskola | Chalmers University of Technology (Bes?ksadress | Visiting address: Kemiv?gen 9) SE-412 96 G?TEBORG, Sweden www.chalmers.se -------------- next part -------------- An HTML attachment was scrubbed... URL: