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:6827810b9cb36 DTSTART;VALUE=DATE:20240501 SEQUENCE:0 TRANSP:TRANSPARENT DTEND;VALUE=DATE:20240503 URL:/institute-for-quantum-computing/events/quantum-con nections-2024-quantum-perspectives SUMMARY:Quantum Connections 2024: Quantum Perspectives CLASS:PUBLIC DESCRIPTION:Summary \n\nJoin us for Quantum Connections May 1-2\, 2024. Thi s year we’re\nhighlighting Quantum Perspectives: the impacts and outlook s driving\nour future.\n X-MICROSOFT-CDO-ALLDAYEVENT:TRUE DTSTAMP:20250516T181643Z END:VEVENT BEGIN:VEVENT UID:6827810b9d5dd DTSTART;TZID=America/Toronto:20240417T190000 SEQUENCE:0 TRANSP:TRANSPARENT DTEND;TZID=America/Toronto:20240417T200000 URL:/institute-for-quantum-computing/events/open-quantu m-computing-one-atom-time SUMMARY:Open Quantum Computing\, One Atom at a Time CLASS:PUBLIC DESCRIPTION:Summary \n\nRAJIBUL ISLAM\nFACULTY\, INSTITUTE FOR QUANTUM COMP UTING\nASSOCIATE PROFESSOR\, DEPARTMENT OF PHYSICS AND ASTRONOMY\, UNIVERS ITY\nOF WATERLOO\nCO-FOUNDER\, OPEN QUANTUM DESIGN\n\nQuantum-Nano Centre\ , 200 University Ave West\, Room QNC 0101 ݮƵ\,\nON CA N2L 3G1\n\nQua ntum computing promises to advance our computational abilities\nsignifican tly in many high-impact research areas. In this period of\nrapid developme nt\, the experimental capabilities needed to build\nquantum computing devi ces and prototypes are highly specialized and\noften difficult to access. In this public talk\, we'll discuss how to\nbuild quantum computing device s one atom a time using the ion-trap\napproach. We'll show how we build qu antum bits out of individually\nisolated atoms\, explore how we use them t o simulate other complex\nsystems\, and showcase how we're building open-a ccess hardware to\nadvance research in this exciting field.\n DTSTAMP:20250516T181643Z END:VEVENT BEGIN:VEVENT UID:6827810b9dcae DTSTART;TZID=America/Toronto:20231004T120000 SEQUENCE:0 TRANSP:TRANSPARENT DTEND;TZID=America/Toronto:20231004T130000 URL:/institute-for-quantum-computing/events/iqc-student -seminar-featuring-impromptu-whiteboard-poster SUMMARY:IQC Student Seminar Featuring Impromptu Whiteboard Poster Session CLASS:PUBLIC DESCRIPTION:Summary \n\nIMPROMPTU WHITEBOARD POSTER SESSION\n\nQuantum Nano Centre (QNC) Room 1201\, 200 University Avenue West\,\nݮƵ\, ON\n\nT his week’s student seminar will take place in the form of an\nimpromptu whiteboard poster session\, where attendees will be divided\ninto groups a nd will discuss each other's current work using the\nwhiteboard. This is t o encourage students to talk about their work in\nprogress\, and practice communication skills by talking to non-experts\n(quantum is a big field!). As always\, pizza will be provided for\nattendees after the seminar.\n\nA DD EVENT TO CALENDAR\n\nApple [https://www.addevent.com/event/hL18814276+a pple]  Google\n[https://www.addevent.com/event/hL18814276+google]  Off ice 365\n[https://www.addevent.com/event/hL18814276+office365]  Outlook\ n[https://www.addevent.com/event/hL18814276+outlook]  Outlook.com\n[http s://www.addevent.com/event/hL18814276+outlookcom]  Yahoo\n[https://www.a ddevent.com/event/hL18814276+yahoo]  \n DTSTAMP:20250516T181643Z END:VEVENT BEGIN:VEVENT UID:6827810b9e45e DTSTART;TZID=America/Toronto:20230920T120000 SEQUENCE:0 TRANSP:TRANSPARENT DTEND;TZID=America/Toronto:20230920T130000 URL:/institute-for-quantum-computing/events/iqc-student -seminar-featuring-shlok-ashok-nahar SUMMARY:IQC Student Seminar Featuring Shlok Ashok Nahar CLASS:PUBLIC DESCRIPTION:Summary \n\nUSING SYMMETRIES TO IMPROVE QUANTUM DE FINETTI REDU CTIONS\n\nQuantum Nano Centre\, 200 University Ave W\, Room QNC 1201\nWate rloo\, ON\, CA N2L 3G1\n\nThe analysis of quantum information processing p rotocols for generic\nstates is challenging. In contrast\, when the states are IID\, i.e. the\nsame in every round of the protocol\, the analysis gr eatly simplifies.\nde Finetti reductions are important to reduce the analy sis of quantum\ninformation processing tasks to the IID case\, though this reduction\nhas some cost associated with it. In this talk I will describe how\nIID-symmetries can be used to reduce the cost associated with the\nq uantum de Finetti reductions. \n\nADD EVENT TO CALENDAR \n\nApple [https:/ /www.addevent.com/event/Zm18670697+apple]  Google\n[https://www.addevent. com/event/Zm18670697+google]  Office 365\n[https://www.addevent.com/event /Zm18670697+office365]  Outlook\n[https://www.addevent.com/event/Zm186706 97+outlook]  Outlook.com\n[https://www.addevent.com/event/Zm18670697+outl ookcom]  Yahoo\n[https://www.addevent.com/event/Zm18670697+yahoo]  \n DTSTAMP:20250516T181643Z END:VEVENT BEGIN:VEVENT UID:6827810b9eb72 DTSTART;TZID=America/Toronto:20230913T120000 SEQUENCE:0 TRANSP:TRANSPARENT DTEND;TZID=America/Toronto:20230913T130000 URL:/institute-for-quantum-computing/events/iqc-student -seminar-featuring-chung-you-gilbert-shih SUMMARY:IQC Student Seminar Featuring Chung-You (Gilbert) Shih CLASS:PUBLIC DESCRIPTION:Summary \n\nPROGRAMMABLE INDIVIDUAL OPTICAL ADDRESSING FOR TRAP PED-ION QUANTUM\nINFORMATION PROCESSORS \n\nTrapped ions are among the mos t advanced platforms for quantum\ncomputation and simulation. Programmable \, arbitrary\, and precise\ncontrol—usually through laser-induced light- matter interaction—is\nrequired to tune ion-ion interactions. These inte ractions translate\ninto diverse parameters of the system under study. Cur rent\ntechnologies grapple with scalability issues in large ion chains and \nwith \"crosstalk\" due to micron-level inter-ion separation. \n\nIn this talk\, we present our development of two optical addressing\nsystems opti mized for non-coherent and coherent quantum controls\,\nrespectively. \n\n The first addressing system employs a reprogrammable hologram to\nmodulate the wavefront of the addressing beam\, thereby engineering the\namplitude and phase profile of light across the ion chain. Our\nimplementation comp ensates for optical aberrations in the system down\nto λ/20 RMS and exhib its less than 10−4 intensity cross-talk error.\nThis results in more tha n 99.9% fidelity when resetting the state or\n99.66% when reading out the state of an individual ion without\ninfluencing adjacent ions. This scheme can be readily extended to over\na hundred ions and adapted to other plat forms\, such as neutral atom\narrays. \n\nAdditionally\, we introduce anot her addressing design\, tailored for\ncoherent quantum operations through Raman transitions. This design\nuses a mirrored acoustic-optical deflector (AOD) setup to optimize\noptical power scaling and sidestep the undesired site-dependent\nfrequency shift commonly observed in AOD-based setups. \n \nADD EVENT TO CALENDAR\n\nApple [https://www.addevent.com/event/eV1857904 2+apple]  Google\n[https://www.addevent.com/event/eV18579042+google]  Of fice 365\n[https://www.addevent.com/event/eV18579042+office365]  Outlook\ n[https://www.addevent.com/event/eV18579042+outlook]  Outlook.com\n[https ://www.addevent.com/event/eV18579042+outlookcom]  Yahoo\n[https://www.add event.com/event/eV18579042+yahoo]  \n DTSTAMP:20250516T181643Z END:VEVENT BEGIN:VEVENT UID:6827810b9f550 DTSTART;TZID=America/Toronto:20230829T120000 SEQUENCE:0 TRANSP:TRANSPARENT DTEND;TZID=America/Toronto:20230829T130000 URL:/institute-for-quantum-computing/events/iqc-student -seminar-featuring-shayan-majidy-0 SUMMARY:IQC Student Seminar Featuring Shayan Majidy CLASS:PUBLIC DESCRIPTION:Summary \n\nCRITICAL PHASE AND SPIN SHARPENING IN SU(2)-SYMMETR IC MONITORED\nQUANTUM CIRCUITS\n\nMonitored quantum circuits exhibit entan glement transitions at certain\nmeasurement rates. Such a transition separ ates phases characterized by\nhow much information an observer can learn f rom the measurement\noutcomes. We study SU(2)-symmetric monitored quantum circuits\, using\nexact numerics and a mapping onto an effective statistic al-mechanics\nmodel. Due to the symmetry's non-Abelian nature\, measuring qubit pairs\nallows for nontrivial entanglement scaling even in the\nmeasu rement-only limit. We find a transition between a volume-law\nentangled ph ase and a critical phase whose diffusive purification\ndynamics emerge fro m the non-Abelian symmetry. Additionally\, we\nidentify a “spin-sharpeni ng transition.” Across the transition\,\nthe rate at which measurements reveal information about the total spin\nquantum number changes parametric ally with system size.\n\nReference\nhttps://journals.aps.org/prb/abstract /10.1103/PhysRevB.108.054307\n[https://journals.aps.org/prb/abstract/10.11 03/PhysRevB.108.054307]\n\nADD EVENT TO CALENDAR\n\nApple [https://www.add event.com/event/Pl18436547+apple]  Google\n[https://www.addevent.com/even t/Pl18436547+google]  Office 365\n[https://www.addevent.com/event/Pl18436 547+office365]  Outlook\n[https://www.addevent.com/event/Pl18436547+outlo ok]  Outlook.com\n[https://www.addevent.com/event/Pl18436547+outlookcom]  Yahoo\n[https://www.addevent.com/event/Pl18436547+yahoo]  \n DTSTAMP:20250516T181643Z END:VEVENT BEGIN:VEVENT UID:6827810b9fda0 DTSTART;TZID=America/Toronto:20230809T120000 SEQUENCE:0 TRANSP:TRANSPARENT DTEND;TZID=America/Toronto:20230809T130000 URL:/institute-for-quantum-computing/events/iqc-student -seminar-featuring-yuming-zhao SUMMARY:IQC Student Seminar Featuring Yuming Zhao CLASS:PUBLIC DESCRIPTION:Summary \n\nPOSITIVITY AND SUM-OF-SQUARES IN QUANTUM INFORMATIO N\n\nA multivariate polynomial is said to be positive if it takes only\nno n-negative values over reals. Hilbert's 17th problem concerns\nwhether eve ry positive polynomial can be expressed as a sum of squares\nof other poly nomials. In general\, we say a noncommutative polynomial\nis positive (res p. matrix positive) if plugging operators (resp.\nmatrices) always yields a positive operator. Many problems in math and\ncomputer science are close ly connected to deciding whether a given\npolynomial is positive and findi ng certificates (e.g.\, sum-of-squares)\nof positivity.\n\nIn the study of nonlocal games in quantum information\, we are\ninterested in tensor prod uct of free algebras. Such an algebra models\na physical system with two s patially separated subsystems\, where in\neach subsystem we can make diffe rent quantum measurements. The recent\nand remarkable MIP*=RE result shows that it is undecidable to\ndetermine whether a polynomial in a tensor pro duct of free algebras is\nmatrix positive. In this talk\, I'll present joi nt work with Arthur\nMehta and William Slofstra\, in which we show that it is undecidable to\ndetermine positivity in tensor product of free algebra s. As a\nconsequence\, there is no sum-of-square certificate for positivit y in\nsuch algebras.\n\nADD EVENT TO CALENDAR\n\nApple [https://www.addeve nt.com/event/ul18248865+apple]  Google\n[https://www.addevent.com/event/ ul18248865+google]  Office 365\n[https://www.addevent.com/event/ul182488 65+office365]  Outlook\n[https://www.addevent.com/event/ul18248865+outlo ok]  Outlook.com\n[https://www.addevent.com/event/ul18248865+outlookcom]   Yahoo\n[https://www.addevent.com/event/ul18248865+yahoo]  \n DTSTAMP:20250516T181643Z END:VEVENT BEGIN:VEVENT UID:6827810ba049f DTSTART;TZID=America/Toronto:20230801T120000 SEQUENCE:0 TRANSP:TRANSPARENT DTEND;TZID=America/Toronto:20230801T130000 URL:/institute-for-quantum-computing/events/iqc-student -seminar-featuring-shlok-nahar-0 SUMMARY:IQC Student Seminar Featuring Shlok Nahar CLASS:PUBLIC DESCRIPTION:Summary \n\nTIME-RESOLVED QUANTUM KEY DISTRIBUTION USING SEMICO NDUCTOR QUANTUM\nDOTS WITH OSCILLATING PHOTONIC STATES\n\nAbstract: Quant um dot-based entangled photon sources are promising\ncandidates for quantu m key distribution (QKD)\, as they can in\nprinciple emit deterministicall y\, with high brightness and low\nmultiphoton contribution. However\, quan tum dots (QD) often inherently\npossess a fine structure splitting (FSS). Since the entangled photonic\nstate in the presence of non-zero FSS is osc illating\, one must settle\nfor a lower efficiency source through temporal post-selection or a\nlower measured entanglement fidelity. In both cases\ , the overall key\nrate is reduced. Our QKD analysis shows that this trade -off can be\novercome by constructing a time-resolved QKD protocol where a ll photon\npairs emitted by a QD with non-zero FSS can be used in secret k ey\ngeneration. This protocol works only when the detection system's\ntemp oral resolution is much smaller than the FSS period. By\nimplementing our protocol\, higher key rates can be achieved as\ncompared to previous QKD e xperiments with QD entangled photon pair\nsources.\n\nADD EVENT TO CALENDA R\n\nApple [https://www.addevent.com/event/en18189052+apple]  Google\n[h ttps://www.addevent.com/event/en18189052+google]  Office 365\n[https://w ww.addevent.com/event/en18189052+office365]  Outlook\n[https://www.addev ent.com/event/en18189052+outlook]  Outlook.com\n[https://www.addevent.co m/event/en18189052+outlookcom]  Yahoo\n[https://www.addevent.com/event/e n18189052+yahoo]  \n DTSTAMP:20250516T181643Z END:VEVENT BEGIN:VEVENT UID:6827810ba0c02 DTSTART;TZID=America/Toronto:20230726T120000 SEQUENCE:0 TRANSP:TRANSPARENT DTEND;TZID=America/Toronto:20230726T130000 URL:/institute-for-quantum-computing/events/iqc-student -seminar-featuring-evan-peters SUMMARY:IQC Student Seminar Featuring Evan Peters CLASS:PUBLIC DESCRIPTION:Summary \n\nSOME LEARNING BOUNDS AND GUARANTEES FOR TESTING (QU ANTUM) HYPOTHESES\n\nMachine learning is a powerful tool\, yet we often do not know how well\na learning algorithm might perform on any given task. One standard\napproach to bound the accuracy of a learning algorithm is to reduce\nthe learning task to hypothesis testing. Fano's inequality then s tates\nthat a large amount of mutual information between the learner's\nob servations and the set of unknown parameters is a necessary\ncondition for success. \n\nIn this talk\, I will describe how such a condition is also sufficient\nfor succeeding at some learning task\, thereby providing a pur ely\ninformation-theoretic guarantee for learning. Noting that this\nguara ntee has an immediate extension to quantum information theory\, I\nwill th en introduce the task of \"testing quantum hypotheses\"\, in which\nthe un known parameters of the learning task are prepared in a quantum\nregister in superposition (rather than being sampled stochastically)\nand the learn er's success at this task is measured by their ability to\nestablish quant um correlations with that register. I will discuss\nongoing attempts to ch aracterize this scenario.\n\nADD EVENT TO CALENDAR\n\nApple [https://www.a ddevent.com/event/FO18051378+apple]  Google\n[https://www.addevent.com/ev ent/FO18051378+google]  Office 365\n[https://www.addevent.com/event/FO180 51378+office365]  Outlook\n[https://www.addevent.com/event/FO18051378+out look]  Outlook.com\n[https://www.addevent.com/event/FO18051378+outlookcom ]  Yahoo\n[https://www.addevent.com/event/FO18051378+yahoo]  \n DTSTAMP:20250516T181643Z END:VEVENT BEGIN:VEVENT UID:6827810ba1342 DTSTART;TZID=America/Toronto:20230720T110000 SEQUENCE:0 TRANSP:TRANSPARENT DTEND;TZID=America/Toronto:20230720T120000 URL:/institute-for-quantum-computing/events/virtual-iqc -phd-candidate-seminar-featuring-jamal-busnaina SUMMARY:Virtual IQC PhD Candidate Seminar Featuring Jamal Busnaina CLASS:PUBLIC DESCRIPTION:Summary \n\nANALOG QUANTUM SIMULATIONS USING A PARAMETRIC MULTI MODE CAVITY\n\nWhile universal quantum computers are still years away from being used\nfor simulating complicated quantum systems\, analog quantum s imulators\nhave become an increasingly attractive approach to studying\ncl assically intractable quantum systems in condensed matter physics\,\nchemi stry\, and high-energy physics.  \n\nWe propose a programmable platform based on a superconducting\nmultimode cavity. The unique design of the cav ity allows us to program\narbitrarily connected lattices where the couplin g strength and phase\nof each individual coupling are highly programmable via parametrically\nactivated interactions. The effectiveness of the cavit y-based AQS\nplatform was demonstrated by the experimental simulation of t wo\ninteresting models. First\, we simulated the effect of a fictitious\nm agnetic field on a 4-site plaquette of a bosonic Creutz ladder. We\nobserv ed topological features such as emergent edge states and\nlocalized solito n states. The platform's ability is further explored\nby introducing pairi ng (downconversion) terms to observe features of\nthe Bosonic Kitaev chain (BKC)\, such as chiral transport and\nsensitivity to boundary conditions.     DTSTAMP:20250516T181643Z END:VEVENT END:VCALENDAR