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X-WR-CALDESC:Events for UW QuantumX
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DTSTART;TZID=America/Los_Angeles:20260203T133000
DTEND;TZID=America/Los_Angeles:20260203T143000
DTSTAMP:20260430T175711
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
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BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20260205T123000
DTEND;TZID=America/Los_Angeles:20260205T133000
DTSTAMP:20260430T175711
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:20260209T160000
DTEND;TZID=America/Los_Angeles:20260209T160000
DTSTAMP:20260430T175711
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:20260210T133000
DTEND;TZID=America/Los_Angeles:20260210T143000
DTSTAMP:20260430T175711
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:20260219T123000
DTEND;TZID=America/Los_Angeles:20260219T123000
DTSTAMP:20260430T175711
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:20260223T160000
DTEND;TZID=America/Los_Angeles:20260223T160000
DTSTAMP:20260430T175711
CREATED:20251218T214822Z
LAST-MODIFIED:20260202T174609Z
UID:8017-1771862400-1771862400@www.quantumx.washington.edu
SUMMARY:Liang Fu\, MIT: TBA
DESCRIPTION:PAA A-102Colloquiahttps://phys.washington.edu/events/2026-02-23/tba
URL:https://www.quantumx.washington.edu/calendar/liang-fu-mit-tba/
LOCATION:PAA A-102
CATEGORIES:Physics
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