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DTSTART;TZID=America/Los_Angeles:20260219T123000
DTEND;TZID=America/Los_Angeles:20260219T123000
DTSTAMP:20260430T195201
CREATED:20260202T185653Z
LAST-MODIFIED:20260202T190003Z
UID:8763-1771504200-1771504200@www.quantumx.washington.edu
SUMMARY:Kirk Madison (University of British Columbia): Tuning the sharpness of quantum measurements using position entangled atomic states
DESCRIPTION:Speaker: Kirk Madison\, University of British ColumbiaAs rigorously proven by Paul Busch in 2007\, quantum systems are necessarily disturbed by measurement .  The amount of disturbance\, interpreted here as state change\, is related to the information gained\, hence a measurement scheme that induces no state change yields no new information. Standard projective measurements\, such as the measurement of an excited state energy (with respect to the groundstate) by coupling a quantum system to a photon and then detecting the photon absorption\, are maximally disruptive since they project the initial state of the system into an eigenstate of the measured observable.  By contrast\, so-called weak measurements provide an observer with little information and\, in turn\, disrupt the quantum state very little.  Also\, known as ‘unsharp’\, ‘fuzzy’ or ‘gentle’\, such measurements have been considered in the context of measuring the quantum trajectory of a system using weak continuous measurements . One scheme for implementing unsharp measurements is to first entangle a target quantum system with an ancillary quantum system and then carry out a measurement on the ancilla.  By adjusting the degree of entanglement\, the sharpness of the measurement on the target system can be controlled. In this talk\, we explore how tunable position-entangled quantum states of atoms can be used to realize tunable quantum measurements.  Entangled states of atomic pairs are created by Feshbach resonance coupling and measurements of the ancilla are conducted either by ancilla selective scattering of single photons or by hard collisional localization of the ancilla by the scattering of room-temperature atoms in the background vapor of the apparatus.
URL:https://www.quantumx.washington.edu/calendar/kirk-madison-university-of-british-columbia-tuning-the-sharpness-of-quantum-measurements-using-position-entangled-atomic-states/
LOCATION:PAB B421
CATEGORIES:Physics
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20260210T133000
DTEND;TZID=America/Los_Angeles:20260210T143000
DTSTAMP:20260430T195201
CREATED:20260202T191115Z
LAST-MODIFIED:20260202T191123Z
UID:8783-1770730200-1770733800@www.quantumx.washington.edu
SUMMARY:Caroline Robin (Bielefeld University)
DESCRIPTION:Hybrid option Available\, register on event website
URL:https://www.quantumx.washington.edu/calendar/caroline-robin-bielefeld-university/
LOCATION:PAB C421\, 3910 15th Ave NE\, Seattle\, WA\, 98195
CATEGORIES:Physics
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20260209T160000
DTEND;TZID=America/Los_Angeles:20260209T160000
DTSTAMP:20260430T195201
CREATED:20251218T214532Z
LAST-MODIFIED:20260202T174609Z
UID:8016-1770652800-1770652800@www.quantumx.washington.edu
SUMMARY:Ben Lev\, Stanford University
DESCRIPTION:PAA A-102Colloquiahttps://phys.washington.edu/events/2026-02-09/tba
URL:https://www.quantumx.washington.edu/calendar/ben-lev-stanford-university/
LOCATION:PAA A-102
CATEGORIES:Physics
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20260205T123000
DTEND;TZID=America/Los_Angeles:20260205T133000
DTSTAMP:20260430T195201
CREATED:20260202T185420Z
LAST-MODIFIED:20260202T190028Z
UID:8760-1770294600-1770298200@www.quantumx.washington.edu
SUMMARY:Joyce Kwan (CU Boulder): Realization of a Pfaffian quantum Hall state with ultracold bosons nbsp
DESCRIPTION:Speaker: Joyce Kwan\, CU BoulderThe Pfaffian (Moore-Read) wavefunction\, proposed to describe the u = 5/2 fractional quantum Hall state\, encodes a paired p-wave superfluid and hosts non-Abelian anyons relevant for topological quantum computation. We report the realization of a three-particle Pfaffian quantum Hall state of ultracold bosons. Using the single-atom control of our quantum simulator\, we engineer and probe the state via a machine-learning–optimized ramp that connects a simple initial state to the Pfaffian. The resulting low-temperature state reveals the characteristic pairing physics of the Pfaffian wavefunction\, establishing a controlled route toward synthetic fractional quantum Hall states in atomic platforms.
URL:https://www.quantumx.washington.edu/calendar/joyce-kwan-cu-boulder-realization-of-a-pfaffian-quantum-hall-state-with-ultracold-bosons-nbsp/
LOCATION:PAB C520
CATEGORIES:Physics
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20260203T133000
DTEND;TZID=America/Los_Angeles:20260203T143000
DTSTAMP:20260430T195201
CREATED:20260202T190338Z
LAST-MODIFIED:20260202T192223Z
UID:8778-1770125400-1770129000@www.quantumx.washington.edu
SUMMARY:Sasha Giem (Harvard University): A Fault-Tolerant Neutral-Atom Architecture for Universal Quantum Computation
DESCRIPTION:Hybrid option available\, register on event website \n\n\n\n\n\nQuantum error correction enables coherent computation on encoded logical qubits while simultaneously removing errors from the underlying physical qubits. Here we utilize reconfigurable arrays of up to 448 neutral atoms to experimentally explore the key elements of a fault-tolerant quantum processing architecture\, including below-threshold correction\, fault-tolerant gate operations\, universality\, and physical error removal during deep-circuit computation. We first demonstrate performance of 2.14(13)x below-threshold in a four-round characterization circuit on individual surface codes\, leveraging loss detection and machine learning decoding. We further explore the physics of repeated error correction in logical entanglement based on transversal gates and lattice surgery and extend to universal logic using transversal teleportation with 3D color codes for analog-angle synthesis. Finally\, we demonstrate a method for mid-circuit qubit re-use\, increasing the experimental cycle rate by two orders of magnitude and implementing deep-circuit protocols involving hundreds of logical teleportations while maintaining constant internal entropy. These results establish foundations for scalable\, universal error-corrected processing and its practical implementation with neutral atom systems
URL:https://www.quantumx.washington.edu/calendar/sasha-giem-harvard-university-a-fault-tolerant-neutral-atom-architecture-for-universal-quantum-computation/
LOCATION:PAB C421\, 3910 15th Ave NE\, Seattle\, WA\, 98195
CATEGORIES:Physics
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20260116T133000
DTEND;TZID=America/Los_Angeles:20260116T143000
DTSTAMP:20260430T195201
CREATED:20251230T214857Z
LAST-MODIFIED:20260407T181855Z
UID:8255-1768570200-1768573800@www.quantumx.washington.edu
SUMMARY:Emma Schmidgall (Microsoft Quantum)\, QISE Seminar: Practical Challenges of Scaling Quantum Information Technologies
DESCRIPTION:Abstract \n\n\n\nQuantum technologies are leaving the laboratory! Many companies are working on moving from single- and few-qubit systems to scaled-up deployments integrated with existing cloud infrastructures. But what does this mean\, really? What are the engineering challenges presented by such a transition? In this talk\, we’ll discuss some of the non-qubit practical challenges of scaling up quantum information and the opportunities available for scientists and engineers as we bring these systems to scale.   \n\n\n\nBio \n\n\n\nEmma Schmidgall is a senior hardware engineer for Microsoft Quantum\, where she’s worked since 2020 on several aspects of a scalable quantum computer from cryogenics to interconnects and custom silicon. Prior to Microsoft\, she worked at Lumotive on beam steering technologies for LIDAR. She was an Intelligence Community Postdoctoral Fellow and Washington Research Foundation Postdoctoral Fellow with Professor Kai-Mei Fu at the University of Washington. Her PhD in physics is from the Technion Israel Institute of Technology.
URL:https://www.quantumx.washington.edu/calendar/emma-schmidgall-microsoft-crossing-the-technological-valley-of-death-practical-challenges-of-scaling-quantum-information-technologies/
LOCATION:Electrical and Computer Engineering (ECE)\, Room 037\, 185 W Stevens Wy NE\, Seattke\, Washington\, 98185
CATEGORIES:Physics
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20260109T133000
DTEND;TZID=America/Los_Angeles:20260109T145000
DTSTAMP:20260430T195201
CREATED:20251230T222922Z
LAST-MODIFIED:20260115T195728Z
UID:8259-1767965400-1767970200@www.quantumx.washington.edu
SUMMARY:Kai-Mei Fu (University of Washington)\, QISE Seminar: Point Defects in Crystals: Trapped Atoms for Quantum Technologies
DESCRIPTION:AbstractPoint defects in crystals are the solid-state analog to trapped ions. Thus these “quantumdefects”\, which can be integrated into solid-state devices\, have gained interest as quantumsensors and qubit candidates for scalable quantum networks. In this talk\, I will introducesome of the basic quantum defect properties desirable for quantum technologies. I willthen focus on my own group’s work advancing hybrid defect-photonics platforms forquantum network applications. \n\n\n\nBioKai-Mei Fu is the Virginia and Prentice Bloedel Professor of Physics and Electrical andComputer Engineering at the University of Washington and holds a dual appointment withthe Pacific Northwest National Laboratory. Kai-Mei received their PhD in Applied Physics in2007 from Stanford University. Their research focuses on the synthesis\, characterizationand control of optically active quantum defects in crystals\, with applications in quantumnetworks and sensing. At UW\, Kai-Mei is the Director of UW’s NSF National ResearchTraining Program: Accelerating Quantum-Enabled Technologies. They serve as the DeputyDirector of the Department of Energy National Quantum Initiative (NQI) Co-design Centerfor Quantum Advantage
URL:https://www.quantumx.washington.edu/calendar/kai-mei-fu-uw-point-defects-in-crystals-trapped-atoms-for-quantum-technologies/
LOCATION:Electrical and Computer Engineering (ECE)\, Room 037\, 185 W Stevens Wy NE\, Seattke\, Washington\, 98185
CATEGORIES:Physics
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20251219T160000
DTEND;TZID=America/Los_Angeles:20251219T170000
DTSTAMP:20260430T195201
CREATED:20251219T172836Z
LAST-MODIFIED:20251219T201106Z
UID:8091-1766160000-1766163600@www.quantumx.washington.edu
SUMMARY:Tomohiro Otsuka (Tohoku University\, Japan): New Materials and Techniques for Semiconductor Quantum Technologies
DESCRIPTION:Speaker: Prof Tomohiro Otsuka (Tohoku University\, Japan) \n\n\n\nTitle: “New Materials and Techniques for Semiconductor Quantum Technologies.”
URL:https://www.quantumx.washington.edu/tomohiro-otsuka-tohoku-university-japan-new-materials-and-techniques-for-semiconductor-quantum-technologies/#new_tab
LOCATION:PAB B421
CATEGORIES:Physics
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20251125T133000
DTEND;TZID=America/Los_Angeles:20251125T133000
DTSTAMP:20260430T195201
CREATED:20251117T182525Z
LAST-MODIFIED:20251209T194647Z
UID:5732-1764077400-1764077400@www.quantumx.washington.edu
SUMMARY:Framework for Quantum Simulations of Energy Loss in Non Abelian Gauge Theories SU 2 Lattice Gauge Theory in 1+1D\, Zhiyao Li
DESCRIPTION:Framework for Quantum Simulations of Energy Loss in Non Abelian Gauge Theories SU 2 Lattice Gauge Theory in 1 1DPAT C-421Seminarshttps://phys.washington.edu/events/2025-11-25/framework-quantum-simulations-energy-loss-non-abelian-gauge-theories-su-2-lattice
URL:https://www.quantumx.washington.edu/calendar/framework-for-quantum-simulations-of-energy-loss-in-non-abelian-gauge-theories-su-2-lattice-gauge-theory-in-1-1d/
LOCATION:PAT C-421
CATEGORIES:Physics
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20251121T123000
DTEND;TZID=America/Los_Angeles:20251121T133000
DTSTAMP:20260430T195201
CREATED:20251117T182532Z
LAST-MODIFIED:20251209T194720Z
UID:7203-1763728200-1763731800@www.quantumx.washington.edu
SUMMARY:Imaging Quantum and Mesoscopic Phenomena with NanoSQUID on Tip Microscopy\, Evgeny Redekop
DESCRIPTION:Speaker: Evgeny Redekop\, UC Santa Barbara\nUnderstanding emergent electronic phases in low-dimensional materials requires experimental tools capable of probing local electromagnetic properties with nanometer resolution and high sensitivity. The nanoSQUID-on-tip (nSOT) is a scanning superconducting quantum interference device fabricated directly on the apex of a pulled quartz tip\, enabling quantitative multimodal imaging at the nanoscale and cryogenic temperatures. In this talk\, I will outline the nSOT’s working principle\, fabrication\, and readout schemes\, emphasizing its versatility as a probe of correlated quantum states. I will present two recent applications: imaging fractional Chern insulators in twisted MoTe₂ and a new approach to mapping transport regimes in dual-gated Bernal bilayer graphene. I will also highlight emerging directions that extend the nSOT’s capabilities\, demonstrating its potential as a universal platform for exploring quantum matter and mesoscopic electrodynamics.
URL:https://www.quantumx.washington.edu/calendar/imaging-quantum-and-mesoscopic-phenomena-with-nanosquid-on-tip-microscopy/
LOCATION:PAB B421
CATEGORIES:Physics
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20251120T123000
DTEND;TZID=America/Los_Angeles:20251120T133000
DTSTAMP:20260430T195201
CREATED:20251117T182537Z
LAST-MODIFIED:20251209T194810Z
UID:7201-1763641800-1763645400@www.quantumx.washington.edu
SUMMARY:Electron fractionalization without magnetic fields characterizing composite fermions in twisted bilayer MoTe2\, Luiz Henrique Santos
DESCRIPTION:Speaker: Santos\, Luiz Henrique\, Emory University\nThe experimental discovery of fractional Chern insulators (FCIs) in moiré materials marks a significant development in the study of highly entangled quantum materials. FCIs differ from the traditional fractional quantum Hall effect not only because they occur without external magnetic fields but also because of essential lattice effects that give rise to topologically non-trivial moiré bands. Despite these differences\, the sequence of FCIs observed in moiré transition metal dichalcogenides and multi-layer graphene aligns with the hierarchy of Jain states found in the conventional FQH system\, which can be interpreted in terms of composite fermions. Motivated by these experimental results\, in this talk\, we will present an analysis of composite fermions that provides a roadmap to understanding Abelian FCIs in twisted bilayer MoTe2. The interplay between the moiré periodic potentials and the Chern-Simons gauge field gives rise to a fractal Hofstadter spectrum of composite fermions characterized a complex structure of incompressible states and topological bands. Among these\, we identify both FCIs consistent with the Jain hierarchy and new classes of FCIs whose transport properties differ from those of the Jain sequence. We also discuss the influence of the displacement field\, suppressing composite fermion gaps and inducing topological phase transitions.
URL:https://www.quantumx.washington.edu/calendar/electron-fractionalization-without-magnetic-fields-characterizing-composite-fermions-in-twisted-bilayer-mote2/
LOCATION:PAB B421
CATEGORIES:Physics
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20251118T150000
DTEND;TZID=America/Los_Angeles:20251118T150000
DTSTAMP:20260430T195201
CREATED:20251117T182544Z
LAST-MODIFIED:20251209T194910Z
UID:5726-1763478000-1763478000@www.quantumx.washington.edu
SUMMARY:Melting the LHC a search for long lived gluinos in liquid detector materials\, Samuel Wong
DESCRIPTION:Speaker: Samuel Wong\, University of Washington\nParticles at the TeV scale with lifetimes of a year or longer could have been abundantly produced at the LHC yet escaped detection because of backgrounds\, and could still be trapped within detector materials. With gluinos in split-supersymmetry as a working example\, we show that these trapped particles can be recovered from detector materials once prepared in liquid form\, for example\, by constructing a large water pool near ATLAS or CMS\, extracting liquid argon from electromagnetic calorimeters\, or melting silicon detectors. These liquid samples can then be processed using iterative centrifugation followed by mass spectrometry\, enabling single-particle sensitivity in macroscopic samples. This method can potentially discover gluinos up to 3 TeV in mass at the HL-LHC.
URL:https://www.quantumx.washington.edu/calendar/melting-the-lhc-a-search-for-long-lived-gluinos-in-liquid-detector-materials/
LOCATION:PAT C-421
CATEGORIES:Physics
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20251118T133000
DTEND;TZID=America/Los_Angeles:20251118T133000
DTSTAMP:20260430T195201
CREATED:20251117T182557Z
LAST-MODIFIED:20251209T194914Z
UID:5724-1763472600-1763472600@www.quantumx.washington.edu
SUMMARY:Classical Shadows for Sample Efficient Measurements of Gauge Invariant Observables\, Henry Froland
DESCRIPTION:Speaker: Henry Froland\, InQubator for Quantum Simulation\nClassical shadows provide a versatile framework for estimating many properties of quantum states from repeated\, randomly chosen measurements without requiring full quantum state tomography. When prior information is available\, such as knowledge of symmetries of states and operators\, this knowledge can be exploited to significantly improve sample efficiency. In this work\, we develop three classical shadow protocols tailored to systems with local (or gauge) symmetries to enable efficient prediction of gauge-invariant observables in lattice gauge theory models which are currently at the forefront of quantum simulation efforts. For such models\, our approaches can offer exponential improvements in sample complexity over symmetry-agnostic methods\, albeit at the cost of increased circuit complexity. We demonstrate these trade-offs using a Z2 lattice gauge theory\, where a dual formulation enables a rigorous analysis of resource requirements\, including both circuit depth and sample complexity.
URL:https://www.quantumx.washington.edu/calendar/classical-shadows-for-sample-efficient-measurements-of-gauge-invariant-observables/
LOCATION:PAT C-421
CATEGORIES:Physics
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20251118T120000
DTEND;TZID=America/Los_Angeles:20251118T130000
DTSTAMP:20260430T195201
CREATED:20251117T182609Z
LAST-MODIFIED:20251209T194921Z
UID:5722-1763467200-1763470800@www.quantumx.washington.edu
SUMMARY:The sound of electrons shattering can be rather quiet\, Josephine Yu
DESCRIPTION:Speaker: Josephine Yu\, Stanford\nThis talk will highlight the results of arXiv:2509.25322. In a Fermi liquid\, the shot noise signature reveals which scattering mechanism — electron-electron or electron-impurity — dominantly impedes charge motion and is thereby a window into the microscopic physics of an electronic system. However\, the understanding of shot noise in strongly correlated phases\, for which a quasiparticle picture may not be justified\, is far less advanced. In this talk\, I will share recent progress on this problem for a certain class of strongly-correlated systems. In particular\, I will present a theory of the non-equilibrium current response for metallic systems near quantum critical points where electronic quasiparticles fractionalize\, such as systems near continuous metal-insulator transitions. I will sketch the derivation of a non-perturbative current noise composition law\, wherein the total noise is the sum of the noise of each fractionalized constituent (bosonic holons and fermionic spinons)\, weighted by their respective resistivities. This composition rule can be interpreted in terms of a simple analogy with resistors in series. Lastly\, I will present an example of how quantum criticality can collude with fractionalization to suppress the measured shot noise in sufficiently long nanowires.
URL:https://www.quantumx.washington.edu/calendar/the-sound-of-electrons-shattering-can-be-rather-quiet/
LOCATION:PAB B421
CATEGORIES:Physics
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20251117T160000
DTEND;TZID=America/Los_Angeles:20251117T160000
DTSTAMP:20260430T195201
CREATED:20251117T182619Z
LAST-MODIFIED:20251209T194838Z
UID:5720-1763395200-1763395200@www.quantumx.washington.edu
SUMMARY:The 2025 Nobel Prize in Physics From Macroscopic Quantum Tunneling to Superconductiing Qubits\, Charles Marcus
DESCRIPTION:Speaker: Charles Marcus\, University of Washington\nVideo Link (requires UW NetID)
URL:https://www.quantumx.washington.edu/calendar/the-2025-nobel-prize-in-physics-from-macroscopic-quantum-tunneling-to-superconductiing-qubits/
LOCATION:Physics/Astronomy Auditorium – PAA A-102\, 3910 15th Ave NE\, Seattle\, WA\, 98105\, United States
CATEGORIES:Physics
END:VEVENT
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