BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Drupal iCal API//EN
X-WR-CALNAME:Events items teaser
BEGIN:VEVENT
UID:6483441ca3393
DTSTART;TZID=America/Toronto:20230531T120000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20230531T130000
SUMMARY:IQC Student Seminar featuring Sainath Motlakunta 
CLASS:PUBLIC
DESCRIPTION:Summary \n\nPRESERVING A QUBIT DURING ADJACENT MEASUREMENTS AT 
 A FEW MICROMETERS\nDISTANCE  \n\nAbstract:\n\nProtecting a quantum objec
 t against irreversible accidental\nmeasurements from its surroundings is n
 ecessary for controlled quantum\noperations. This becomes especially chal
 lenging or unfeasible if one\nmust simultaneously measure or reset a nearb
 y object's quantum state\,\nsuch as in quantum error correction. \n\nIn a
 tomic systems - among the most established quantum information\nprocessing
  platforms - current attempts to preserve qubits against\nresonant laser-d
 riven adjacent measurements\, waste valuable\nexperimental resources such 
 as coherence time or extra qubits and\nintroduce additional errors. We p
 reserve the quantum state of an\n'asset' ion qubit with high fidelity\, wh
 ile a neighbouring qubit at a\nfew microns distance is reset/measured. We 
 achieve < 1 x\n10-3 probability of accidental measurement of the asset qu
 bit during\na neighbouring qubit reset and < 4 x 10-3 while applying a de
 tection\nbeam on the same neighbour\, for 11 μs\, at a distance of 6 μ
 m or 4\ntimes the addressing Gaussian beam waist (permitted by the numeric
 al\naperture).\n\nThese low probabilities correspond to the preservation o
 f the quantum\nstate of the qubit with fidelities above 99.90% (state-rese
 t) and\n99.6% (state-measurement). Our results are enabled by precise\nwa
 vefront control of the addressing optical beams\, while utilizing a\nsin
 gle ion as a quantum sensor of optical aberrations.\n\nOur work demonstra
 tes the feasibility of in-situ state-reset and\nmeasurement operations\, 
 building towards enhancements in the speed and\ncapabilities of quantum pr
 ocessors such as in simulating\nmeasurement-driven quantum phases and real
 izing quantum error\ncorrection.\n 
DTSTAMP:20230609T152412Z
END:VEVENT
END:VCALENDAR