BEGIN:VCALENDAR VERSION:2.0 PRODID:-//Drupal iCal API//EN X-WR-CALNAME:Events items teaser X-WR-TIMEZONE:America/Toronto BEGIN:VTIMEZONE TZID:America/Toronto X-LIC-LOCATION:America/Toronto BEGIN:DAYLIGHT TZNAME:EDT TZOFFSETFROM:-0500 TZOFFSETTO:-0400 DTSTART:20240310T070000 END:DAYLIGHT BEGIN:DAYLIGHT TZNAME:EDT TZOFFSETFROM:-0500 TZOFFSETTO:-0400 DTSTART:20230312T070000 END:DAYLIGHT BEGIN:STANDARD TZNAME:EST TZOFFSETFROM:-0400 TZOFFSETTO:-0500 DTSTART:20231105T060000 END:STANDARD BEGIN:STANDARD TZNAME:EST TZOFFSETFROM:-0400 TZOFFSETTO:-0500 DTSTART:20221106T060000 END:STANDARD END:VTIMEZONE BEGIN:VEVENT UID:69e793ea1b47f DTSTART;VALUE=DATE:20240812 SEQUENCE:0 TRANSP:TRANSPARENT DTEND;VALUE=DATE:20240824 URL:https://uwaterloo.ca/institute-for-quantum-computing/events/quantum-sch ool-young-students LOCATION:Waterloo ON N2L 3G1 Canada SUMMARY:Quantum School for Young Students CLASS:PUBLIC DESCRIPTION:Discover how mathematics\, physics\, computer science\, enginee ring\, and\nmore combine into one of the most exciting topics in modern sc ience\n– quantum information – at the Quantum School for Young Student s\n(QSYS). X-MICROSOFT-CDO-ALLDAYEVENT:TRUE DTSTAMP:20260421T151242Z END:VEVENT BEGIN:VEVENT UID:69e793ea1c343 DTSTART;VALUE=DATE:20240819 SEQUENCE:0 TRANSP:TRANSPARENT DTEND;VALUE=DATE:20240831 URL:https://uwaterloo.ca/institute-for-quantum-computing/events/quantum-sch ool-young-students LOCATION:Waterloo ON N2L 3G1 Canada SUMMARY:Quantum School for Young Students CLASS:PUBLIC DESCRIPTION:Discover how mathematics\, physics\, computer science\, enginee ring\, and\nmore combine into one of the most exciting topics in modern sc ience\n– quantum information – at the Quantum School for Young Student s\n(QSYS). X-MICROSOFT-CDO-ALLDAYEVENT:TRUE DTSTAMP:20260421T151242Z END:VEVENT BEGIN:VEVENT UID:69e793ea1ca80 DTSTART;TZID=America/Toronto:20240522T120000 SEQUENCE:0 TRANSP:TRANSPARENT DTEND;TZID=America/Toronto:20240522T130000 URL:https://uwaterloo.ca/institute-for-quantum-computing/events/iqc-student -seminar-featuring-nachiket-sherlekar LOCATION:QNC - Quantum Nano Centre 200 University Avenue West Room QNC 1201 Waterloo ON N2L 3G1 Canada SUMMARY:IQC Student Seminar Featuring Nachiket Sherlekar CLASS:PUBLIC DESCRIPTION:STABLE AND LOCALIZED EMISSION FROM AMBIPOLAR DOPANT-FREE LATERA L P-N\nJUNCTIONS\n\nQuantum-Nano Centre\, 200 University Ave West\, Room Q NC 1201 Waterloo\,\nON CA N2L 3G1\n\nCombining the architectures of a dopa nt-free lateral p-n junction and\na single-electron pump in a GaAs/AlGaAs heterostructure material\nsystem could yield high-rate\, electrically-driv en quantum emitters\nwith performances surpassing the competition in quant um sensing\,\ncommunication and cryptography. Observed drawbacks of the do pant-free\np-n junctions are a rapid decay in electroluminescence during\n operation\, as well as delocalized emission that lowers the measured\nquan tum efficiency. This talk details novel measurement protocols and\ngate ar chitectures implemented by us to overcome these challenges. DTSTAMP:20260421T151242Z END:VEVENT BEGIN:VEVENT UID:69e793ea1d24d DTSTART;TZID=America/Toronto:20240124T120000 SEQUENCE:0 TRANSP:TRANSPARENT DTEND;TZID=America/Toronto:20240124T130000 URL:https://uwaterloo.ca/institute-for-quantum-computing/events/iqc-student -seminar-featuring-everett-patterson LOCATION:QNC - Quantum Nano Centre 200 University Avenue West Room QNC 1201 Waterloo ON N2L 3G1 Canada SUMMARY:IQC Student Seminar Featuring Everett Patterson CLASS:PUBLIC DESCRIPTION:UNRUH PHENOMENA AND THERMALIZATION FOR QUDIT DETECTORS\n\nQuant um-Nano Centre\, 200 University Ave West\, Room QNC 1201 Waterloo\,\nON CA N2L 3G1\n\nThe Unruh effect is the flat space analogue to Hawking radiati on\,\ndescribing how an observer in flat spacetime perceives the quantum\n vacuum state to be in a thermal state when moving along a constantly\nacce lerated trajectory. This effect is often described operationally\nusing th e qubit-based Unruh-DeWitt detector.\n\nWe study Unruh phenomena for more general qudit detectors coupled to a\nquantized scalar field\, noting the limitations to the utility of the\ndetailed balance condition as an indica tor for Unruh thermality of\nhigher-dimensional qudit detector models. We illustrate these\nlimitations using two types of qutrit detector models ba sed on the\nspin-1 representations of SU(2) and the non-Hermitian generali zation\nof the Pauli observables (the Heisenberg-Weyl operators).\n\n[2309 .04598] Unruh phenomena and thermalization for qudit detectors\n(arxiv.org ) [https://arxiv.org/abs/2309.04598] DTSTAMP:20260421T151242Z END:VEVENT BEGIN:VEVENT UID:69e793ea1db35 DTSTART;TZID=America/Toronto:20240110T120000 SEQUENCE:0 TRANSP:TRANSPARENT DTEND;TZID=America/Toronto:20240110T130000 URL:https://uwaterloo.ca/institute-for-quantum-computing/events/iqc-student -seminar-featuring-senrui-chen-university-chicago LOCATION:QNC - Quantum Nano Centre 200 University Avenue West QNC 1201 Wate rloo ON N2L 3G1 Canada SUMMARY:IQC Student Seminar Featuring Senrui Chen\, University of Chicago CLASS:PUBLIC DESCRIPTION:TIGHT BOUNDS FOR PAULI CHANNEL LEARNING WITH AND WITHOUT ENTANG LEMENT\n\nQuantum Nano Centre\, 200 University Ave West\, Room QNC 1201\nW aterloo\, ON CA N2L 3G1\n\nQuantum entanglement is a crucial resource for learning properties\nfrom nature\, but a precise characterization of its a dvantage can be\nchallenging. In this work\, we consider learning algorith ms without\nentanglement as those that only utilize separable states\,\nme asurements\, and operations between the main system of interest and\nan an cillary system. Interestingly\, these algorithms are equivalent to\nthose that apply quantum circuits on the main system interleaved with\nmid-circu it measurements and classical feedforward. Within this\nsetting\, we prove a tight lower bound for Pauli channel learning\nwithout entanglement that closes the gap between the best-known upper\nbound. In particular\, we sh ow that Θ(n^2/_ε_^2) rounds of\nmeasurements are required to estimate ea ch eigenvalue of an n-qubit\nPauli channel to _ε_ error with high proba bility when learning\nwithout entanglement. In contrast\, a learning algor ithm with\nentanglement only needs Θ(1/_ε_^2) copies of the Pauli channe l. Our\nresults strengthen the foundation for an entanglement-enabled\nadv antage for Pauli noise characterization. We will talk about\nongoing expe rimental progress in this direction.\n\nREFERENCE: Mainly based on [arXiv: 2309.13461] DTSTAMP:20260421T151242Z END:VEVENT BEGIN:VEVENT UID:69e793ea1e31f DTSTART;TZID=America/Toronto:20231121T120000 SEQUENCE:0 TRANSP:TRANSPARENT DTEND;TZID=America/Toronto:20231121T130000 URL:https://uwaterloo.ca/institute-for-quantum-computing/events/quantum-tod ay-quantum-ethics-project SUMMARY:Quantum Today: The Quantum Ethics Project CLASS:PUBLIC DESCRIPTION:Live on YouTube [https://www.youtube.com/watch?v=5JUnjsS4AHc]\n \nJoin us for Quantum Today\, where we sit down with researchers from the\ nUniversity of Waterloo’s Institute for Quantum Computing (IQC) to\ntalk about their work\, its impact and where their research may lead.\n\nIn th is special session\, we’ll be joined by Joan Arrow and Özge\nGülsayin of the Quantum Ethics Project\n[https://www.quantumethicsproject.org/]\, a team of researchers\nexploring the intersection of quantum and society. W e’ll discuss how\nto advocate for the responsible and inclusive developm ent of quantum\ntechnologies through education and research\, and why an e thics lens is\nimportant in even the early stages of technological innovat ion.\n\n  DTSTAMP:20260421T151242Z END:VEVENT BEGIN:VEVENT UID:69e793ea1ed9b DTSTART;TZID=America/Toronto:20231004T120000 SEQUENCE:0 TRANSP:TRANSPARENT DTEND;TZID=America/Toronto:20231004T130000 URL:https://uwaterloo.ca/institute-for-quantum-computing/events/iqc-student -seminar-featuring-impromptu-whiteboard-poster LOCATION:QNC - Quantum Nano Centre 200 University Avenue West QNC 1201 Wate rloo ON N2L 3G1 Canada SUMMARY:IQC Student Seminar Featuring Impromptu Whiteboard Poster Session CLASS:PUBLIC DESCRIPTION:IMPROMPTU WHITEBOARD POSTER SESSION\n\nQuantum Nano Centre (QNC ) Room 1201\, 200 University Avenue West\,\nWaterloo\, ON\n\nThis week’s student seminar will take place in the form of an\nimpromptu whiteboard p oster session\, where attendees will be divided\ninto groups and will disc uss each other's current work using the\nwhiteboard. This is to encourage students to talk about their work in\nprogress\, and practice communicatio n skills by talking to non-experts\n(quantum is a big field!). As always\, pizza will be provided for\nattendees after the seminar.\n\nADD EVENT TO CALENDAR\n\nApple [https://www.addevent.com/event/hL18814276+apple]  Goo gle\n[https://www.addevent.com/event/hL18814276+google]  Office 365\n[ht tps://www.addevent.com/event/hL18814276+office365]  Outlook\n[https://ww w.addevent.com/event/hL18814276+outlook]  Outlook.com\n[https://www.adde vent.com/event/hL18814276+outlookcom]  Yahoo\n[https://www.addevent.com/ event/hL18814276+yahoo]   DTSTAMP:20260421T151242Z END:VEVENT BEGIN:VEVENT UID:69e793ea1f6db DTSTART;TZID=America/Toronto:20230920T120000 SEQUENCE:0 TRANSP:TRANSPARENT DTEND;TZID=America/Toronto:20230920T130000 URL:https://uwaterloo.ca/institute-for-quantum-computing/events/iqc-student -seminar-featuring-shlok-ashok-nahar LOCATION:QNC - Quantum Nano Centre 200 University Avenue West QNC 1201 Wate rloo ON N2L 3G1 Canada SUMMARY:IQC Student Seminar Featuring Shlok Ashok Nahar CLASS:PUBLIC DESCRIPTION:USING SYMMETRIES TO IMPROVE QUANTUM DE FINETTI REDUCTIONS\n\nQu antum Nano Centre\, 200 University Ave W\, Room QNC 1201\nWaterloo\, ON\, CA N2L 3G1\n\nThe analysis of quantum information processing protocols for generic\nstates is challenging. In contrast\, when the states are IID\, i .e. the\nsame in every round of the protocol\, the analysis greatly simpli fies.\nde Finetti reductions are important to reduce the analysis of quant um\ninformation processing tasks to the IID case\, though this reduction\n has some cost associated with it. In this talk I will describe how\nIID-sy mmetries can be used to reduce the cost associated with the\nquantum de Fi netti reductions. \n\nADD EVENT TO CALENDAR \n\nApple [https://www.addeven t.com/event/Zm18670697+apple]  Google\n[https://www.addevent.com/event/Zm 18670697+google]  Office 365\n[https://www.addevent.com/event/Zm18670697+ office365]  Outlook\n[https://www.addevent.com/event/Zm18670697+outlook]  Outlook.com\n[https://www.addevent.com/event/Zm18670697+outlookcom]  Ya hoo\n[https://www.addevent.com/event/Zm18670697+yahoo]   DTSTAMP:20260421T151242Z END:VEVENT BEGIN:VEVENT UID:69e793ea2007e DTSTART;TZID=America/Toronto:20230913T120000 SEQUENCE:0 TRANSP:TRANSPARENT DTEND;TZID=America/Toronto:20230913T130000 URL:https://uwaterloo.ca/institute-for-quantum-computing/events/iqc-student -seminar-featuring-chung-you-gilbert-shih LOCATION:QNC - Quantum Nano Centre 200 University Avenue West QNC 1201 Wate rloo ON N2L 3G1 Canada SUMMARY:IQC Student Seminar Featuring Chung-You (Gilbert) Shih CLASS:PUBLIC DESCRIPTION:PROGRAMMABLE INDIVIDUAL OPTICAL ADDRESSING FOR TRAPPED-ION QUAN TUM\nINFORMATION PROCESSORS \n\nTrapped ions are among the most advanced p latforms for quantum\ncomputation and simulation. Programmable\, arbitrary \, and precise\ncontrol—usually through laser-induced light-matter inter action—is\nrequired to tune ion-ion interactions. These interactions tra nslate\ninto diverse parameters of the system under study. Current\ntechno logies grapple with scalability issues in large ion chains and\nwith \"cro sstalk\" due to micron-level inter-ion separation. \n\nIn this talk\, we p resent our development of two optical addressing\nsystems optimized for no n-coherent and coherent quantum controls\,\nrespectively. \n\nThe first ad dressing system employs a reprogrammable hologram to\nmodulate the wavefro nt of the addressing beam\, thereby engineering the\namplitude and phase p rofile of light across the ion chain. Our\nimplementation compensates for optical aberrations in the system down\nto λ/20 RMS and exhibits less tha n 10−4 intensity cross-talk error.\nThis results in more than 99.9% fide lity when resetting the state or\n99.66% when reading out the state of an individual ion without\ninfluencing adjacent ions. This scheme can be read ily extended to over\na hundred ions and adapted to other platforms\, such as neutral atom\narrays. \n\nAdditionally\, we introduce another addressi ng design\, tailored for\ncoherent quantum operations through Raman transi tions. This design\nuses a mirrored acoustic-optical deflector (AOD) setup to optimize\noptical power scaling and sidestep the undesired site-depend ent\nfrequency shift commonly observed in AOD-based setups. \n\nADD EVENT TO CALENDAR\n\nApple [https://www.addevent.com/event/eV18579042+apple]  G oogle\n[https://www.addevent.com/event/eV18579042+google]  Office 365\n[h ttps://www.addevent.com/event/eV18579042+office365]  Outlook\n[https://ww w.addevent.com/event/eV18579042+outlook]  Outlook.com\n[https://www.addev ent.com/event/eV18579042+outlookcom]  Yahoo\n[https://www.addevent.com/ev ent/eV18579042+yahoo]   DTSTAMP:20260421T151242Z END:VEVENT BEGIN:VEVENT UID:69e793ea209f2 DTSTART;TZID=America/Toronto:20230829T120000 SEQUENCE:0 TRANSP:TRANSPARENT DTEND;TZID=America/Toronto:20230829T130000 URL:https://uwaterloo.ca/institute-for-quantum-computing/events/iqc-student -seminar-featuring-shayan-majidy-0 LOCATION:QNC - Quantum Nano Centre 200 University Avenue West QNC 1201 Wate rloo ON N2L 3G1 Canada SUMMARY:IQC Student Seminar Featuring Shayan Majidy CLASS:PUBLIC DESCRIPTION:CRITICAL PHASE AND SPIN SHARPENING IN SU(2)-SYMMETRIC MONITORED \nQUANTUM CIRCUITS\n\nMonitored quantum circuits exhibit entanglement tran sitions at certain\nmeasurement rates. Such a transition separates phases characterized by\nhow much information an observer can learn from the meas urement\noutcomes. We study SU(2)-symmetric monitored quantum circuits\, u sing\nexact numerics and a mapping onto an effective statistical-mechanics \nmodel. Due to the symmetry's non-Abelian nature\, measuring qubit pairs\ nallows for nontrivial entanglement scaling even in the\nmeasurement-only limit. We find a transition between a volume-law\nentangled phase and a cr itical phase whose diffusive purification\ndynamics emerge from the non-Ab elian symmetry. Additionally\, we\nidentify a “spin-sharpening transitio n.” Across the transition\,\nthe rate at which measurements reveal infor mation about the total spin\nquantum number changes parametrically with sy stem size.\n\nReference\nhttps://journals.aps.org/prb/abstract/10.1103/Phy sRevB.108.054307\n[https://journals.aps.org/prb/abstract/10.1103/PhysRevB. 108.054307]\n\nADD EVENT TO CALENDAR\n\nApple [https://www.addevent.com/ev ent/Pl18436547+apple]  Google\n[https://www.addevent.com/event/Pl18436547 +google]  Office 365\n[https://www.addevent.com/event/Pl18436547+office36 5]  Outlook\n[https://www.addevent.com/event/Pl18436547+outlook]  Outloo k.com\n[https://www.addevent.com/event/Pl18436547+outlookcom]  Yahoo\n[ht tps://www.addevent.com/event/Pl18436547+yahoo]   DTSTAMP:20260421T151242Z END:VEVENT BEGIN:VEVENT UID:69e793ea212d7 DTSTART;TZID=America/Toronto:20230809T120000 SEQUENCE:0 TRANSP:TRANSPARENT DTEND;TZID=America/Toronto:20230809T130000 URL:https://uwaterloo.ca/institute-for-quantum-computing/events/iqc-student -seminar-featuring-yuming-zhao LOCATION:QNC - Quantum Nano Centre 200 University Avenue West QNC 1201 Wate rloo ON N2L 3G1 Canada SUMMARY:IQC Student Seminar Featuring Yuming Zhao CLASS:PUBLIC DESCRIPTION:POSITIVITY AND SUM-OF-SQUARES IN QUANTUM INFORMATION\n\nA multi variate polynomial is said to be positive if it takes only\nnon-negative v alues over reals. Hilbert's 17th problem concerns\nwhether every positive polynomial can be expressed as a sum of squares\nof other polynomials. In general\, we say a noncommutative polynomial\nis positive (resp. matrix po sitive) if plugging operators (resp.\nmatrices) always yields a positive o perator. Many problems in math and\ncomputer science are closely connected to deciding whether a given\npolynomial is positive and finding certifica tes (e.g.\, sum-of-squares)\nof positivity.\n\nIn the study of nonlocal ga mes in quantum information\, we are\ninterested in tensor product of free algebras. Such an algebra models\na physical system with two spatially sep arated subsystems\, where in\neach subsystem we can make different quantum measurements. The recent\nand remarkable MIP*=RE result shows that it is undecidable to\ndetermine whether a polynomial in a tensor product of free algebras is\nmatrix positive. In this talk\, I'll present joint work with Arthur\nMehta and William Slofstra\, in which we show that it is undecida ble to\ndetermine positivity in tensor product of free algebras. As a\ncon sequence\, there is no sum-of-square certificate for positivity in\nsuch a lgebras.\n\nADD EVENT TO CALENDAR\n\nApple [https://www.addevent.com/event /ul18248865+apple]  Google\n[https://www.addevent.com/event/ul18248865+g oogle]  Office 365\n[https://www.addevent.com/event/ul18248865+office365 ]  Outlook\n[https://www.addevent.com/event/ul18248865+outlook]  Outlo ok.com\n[https://www.addevent.com/event/ul18248865+outlookcom]  Yahoo\n[ https://www.addevent.com/event/ul18248865+yahoo]   DTSTAMP:20260421T151242Z END:VEVENT END:VCALENDAR