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SUMMARY:QSE Quantum Seminar: Towards the experimental implementation of a 
 critical Schrödinger-cat qubit
DTSTART:20240208T120000
DTEND:20240208T133000
DTSTAMP:20260511T105206Z
UID:0dbfac78672fb4e59ec2ef9de8df56db9b95d01955d41fa4bd05ddf6
CATEGORIES:Conferences - Seminars
DESCRIPTION:Alexander Grimm\, Paul Scherrer Institute\nTHIS EVENT HAS BEEN
  REPLACED BY THE QSE QUANTUM NETWORKING EVENT\n_____\n\nPlease join us fo
 r the QSE Center Quantum Seminar with Dr Alexander Grimm from the Paul
  Scherrer Institute\, who will speak Thursday February 8: "Towards the ex
 perimental implementation of a critical Schrödinger-cat qubit"\nLocation:
  CE 1 100\n\nPizzas will be available before the seminar at 12:00. All P
 hDs\, postdocs\, students\, and PIs are welcome to join us.\n\nTITLE: Tow
 ards the experimental implementation of a critical Schrödinger-cat qubit\
 n\nABSTRACT: Quantum two-level systems are routinely used to encode qubit
 s but tend to be inherently fragile\, leading to errors in the encoded inf
 ormation. Quantum error correction (QEC) addresses this challenge by encod
 ing effective qubits into more complex quantum systems. Unfortunately\, th
 e hardware overhead associated with QEC can quickly become very large.\nIn
  contrast\, a qubit that is intrinsically protected against a subset of qu
 antum errors can be encoded into superpositions of two opposite-phase osci
 llations in a resonator\, so-called Schrödinger-cat states [1]. There are
  various methods [2\,3] to stabilize and manipulate the basis states of su
 ch a “Schrödinger-cat qubit” which has the potential to significantly
  reduce the complexity of QEC. I will describe how these methods can be co
 mbined in the so-called “critical” Schrödinger-cat qubit [4] and disc
 uss our progress towards its experimental implementation.\n\nReferences\n\
 n	Mirrahimi\, M. et al. New J. Phys. 16\, 045014 (2014).\n	Leghtas\, Z.
  et al. Science 347\, 853–857 (2015).\n	Grimm\, A. \, Frattini N.E.\,
  et al. Nature 584\, 205–209 (2020).\n	Gravina\, L.\, Minganti\, F. &
  Savona\, V. PRX Quantum 4\, 020337 (2023).\n\nBIO: Alexander Grimm is 
 the group leader of the bosonic quantum information group at the Paul S
 cherrer Institut. He obtained his PhD for research done between 2011 and 2
 015 in the group of Max Hofheinz at CEA Grenoble. During this time\, he ex
 perimentally demonstrated that inelastic Cooper pair tunneling through a v
 oltage-biased Josephson junction can be leveraged to create a source of an
 tibunched microwave radiation. From 2016 to 2019 he was part of the group 
 of Michel Devoret at Yale University as a postdoctoral associate\, working
  on autonomous quantum error correction (QEC) in bosonic codes. There\, he
  performed various QEC experiments including the demonstration and operati
 on of a ‘’Kerr-cat qubit’’\, a type of bosonic qubit which is enc
 oded into superpositions of stabilized coherent states. For his contributi
 ons to the field of quantum information processing with non-linear effects
  in Josephson junctions he received the 2022 Nicholas Kurti prize.\n\n 
LOCATION:CE 1 100 https://plan.epfl.ch/?room==CE%201%20100
STATUS:CANCELLED
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