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:20230312T070000
END:DAYLIGHT
BEGIN:STANDARD
TZNAME:EST
TZOFFSETFROM:-0400
TZOFFSETTO:-0500
DTSTART:20221106T060000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
UID:69d31e5fd86d3
DTSTART;TZID=America/Toronto:20230815T090000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20230815T100000
URL:https://uwaterloo.ca/institute-for-quantum-computing/events/sainath-mot
 lakunta-phd-thesis-defence
LOCATION:PHY - Physics 352 200 University Avenue West Waterloo ON N2L 3G1 C
 anada
SUMMARY:Sainath Motlakunta PhD Thesis Defence
CLASS:PUBLIC
DESCRIPTION:DEVELOPING A LARGE-SCALE\, PROGRAMMABLE TRAPPED ION QUANTUM SIM
 ULATOR\nWITH IN SITU MID-CIRCUIT MEASUREMENT AND RESET\n\nQuantum simulato
 rs are a valuable resource for studying complex\nmany-body systems. With t
 heir ability to provide near-term advantages\,\nanalog quantum simulators 
 show great promise. During the course of my\nPhD\, my aim was to construct
  a large-scale trapped-ion based analog\nquantum simulator with several ob
 jectives in mind: controllability\,\nminimal external decoherence\, an exp
 andable toolkit for quantum\nsimulations\, enhanced stability through robu
 st design practices\, and\npushing the boundaries of error correction.\n\n
 One of my key achievements is the demonstration of high-fidelity\npreserva
 tion of an “asset” ion qubit while simultaneously\nresetting or measur
 ing a neighboring “process” qubit located a few\nmicrons away. My resu
 lts show that I achieve a probability of\naccidental measurement of the as
 set qubit below 1×10−3 while\nresetting the process qubit. Similarly\, 
 when applying a detection beam\non the same neighboring qubit to achieve f
 ast detection times\, the\nprobability remains below 4 × 10−3 at a dist
 ance of 6 μm. These\nlow probabilities correspond to the preservation of 
 the quantum state\nof the asset qubit with fidelities above 99.9% for stat
 e reset and\n99.6% for state measurement.\n\nAdditionally\, I successfully
  conduct a dissipative many-body cooling\nexperiment based on reservoir en
 gineering by leveraging site-selective\nmid-circuit resets. I propose and 
 optimize a protocol utilizing\nreservoir engineering to efficiently cool t
 he spin state of a\nsubsystem coupled to a reservoir with controlled dissi
 pation. Through\nanalog quantum simulation of this protocol\, I am able to
  demonstrate\nthe lowering of energy within the subsystem.\n\nFurthermore\
 , I thoroughly discuss the design\, fabrication\, and\nassembly of a large
 -scale trapped ion quantum simulator called the\nBlade trap as part of my 
 PhD work. I highlight the specific design\nconsiderations taken to isolate
  the trapped ions from external\ndisturbances that could introduce errors.
  Comprehensive testing\nprocedures are presented to evaluate the performan
 ce and stability of\nthe Blade trap\, which are crucial for assessing the 
 effectiveness of\nthe design. An important milestone I achieve is reaching
  a base\npressure below 9E-13 mbar\, demonstrating the successful implemen
 tation\nof techniques to maintain an extremely low-pressure environment id
 eal\nfor quantum simulation.
DTSTAMP:20260406T024551Z
END:VEVENT
END:VCALENDAR