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SUMMARY:Towards Quantum Computing with Spins on Surfaces
DTSTART:20240402T161500
DTEND:20240402T171500
DTSTAMP:20260412T021336Z
UID:48cdf9474ea4840b9d22387f80e2f6b63a1eb492b621d849ddc979be
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Andreas Heinrich\, Center for Quantum Nanoscience\, Seou
 l & Department of Physics\, Ewha Womans University\, Seoul\nThere is a st
 rong international research effort in the area of quantum information scie
 nce. Here\, the concepts of quantum coherence\, superposition and entangle
 ment of quantum states are exploited. These concepts were originally shown
  with photons as well as atoms and ions in vacuum traps. Over the past two
  decades\, many advances at studying such quantum coherence in solid-state
  and molecular architectures have evolved [1].\nIn this talk we will focus
  on quantum-coherent experiments in Scanning Tunneling Microscopy (STM). S
 TM enables the study of surfaces with atomic-scale spatial resolution and 
 offers the ability to study individual atoms and molecules on surfaces. In
  order to study qubits with STM\, we recently learned how to combine STM w
 ith electron spin resonance [2\,3]. Spin resonance gives us the means to q
 uantum-coherently control an individual atomic or molecular spin on a surf
 ace. Using short pulses of microwave radiation further enables us to perfo
 rm qubit rotations and learn about the quantum coherence times of our spin
 s [4]. Finally\, we will demonstrate multi-qubit operations with spins on 
 surfaces and discuss their performance measures [5]. Future directions for
  improvements will wrap up the talk.\n \n\n	Andreas J. Heinrich\, William
  D. Oliver\, Lieven M. K. Vandersypen\, Arzhang Ardavan\, Roberta Sessoli\
 , Daniel Loss\, Ania Bleszynski Jayich\, Joaquin Fernandez-Rossier\, Arne 
 Laucht\, Andrea Morello\, “Quantum-coherent nanoscience”\, Nature Nano
 technology\, 16\, 1318-1329 (2021).\n	Susanne Baumann\, William Paul\, Tae
 young Choi\, Christopher P. Lutz\, Arzhang Ardavan\, Andreas J. Heinrich\,
  “Electron Paramagnetic Resonance of Individual Atoms on a Surface”\, 
 Science 350\, 417 (2015).\n	Yi Chen\, Yujeong Bae\, Andreas Heinrich\, “
 Harnessing the Quantum Behavior of Spins on Surfaces”\, Advanced Materia
 ls 2023\, 2107534 (2022).\n	Kai Yang\, William Paul\, Soo-Hyon Phark\, Phi
 lip Willke\, Yujeong Bae\, Taeyoung Choi\, Taner Esat\, Arzhang Ardavan\, 
 Andreas J. Heinrich\, and Christopher P. Lutz\, “Coherent spin manipulat
 ion of individual atoms on a surface”\, Science 366\, 509 (2019).\n	Yu W
 ang\, Yi Chen\, Hong T. Bui\, Christoph Wolf\, Masahiro Haze\, Cristina Mi
 er\, Jinkyung Kim\, Deung-Jang Choi\, Christopher P. Lutz\, Yujeong Bae\, 
 Soo-hyon Phark\, Andreas J. Heinrich\, Science 382\, 87 (2023).\n	Individu
 al\n\n\nSupport from Institute for Basic Science (IBS-R027-D1) is grateful
 ly acknowledged.
LOCATION:CE 1 2 https://plan.epfl.ch/?room==CE%201%202 https://epfl.zoom.u
 s/j/64905394203
STATUS:CONFIRMED
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