Colloquium - Mitali Banerjee (EPFL) - Neutral modes in quantum Hall effect: Dr. Jekyll and Mr. Hyde

Mitali Banerjee
April 12, 2022
3:45PM - 4:45PM
Zoom link below

Date Range
2022-04-12 15:45:00 2022-04-12 16:45:00 Colloquium - Mitali Banerjee (EPFL) - Neutral modes in quantum Hall effect: Dr. Jekyll and Mr. Hyde Neutral modes in quantum Hall effect: Dr. Jekyll and Mr. Hyde Prof. Mitali Banerjee Laboratory of Quantum Physics, Topology and Correlations École Polytechnique Fédérale de Lausanne, Switzerland Virtual (link below) Faculty Host: Nandini Trivedi Abstract: Quantum Hall effects in 2D electron gas exemplify the earliest class of topological phases in solid state physics, characterized by an insulating bulk and gapless edge excitations. The quantum Hall effect has been a source of many concepts that have become essential in more general quantum many-body problems. The fractional quantum Hall states host fractional charges, neutral excitations, and unlike the integer quantum Hall states, they generally support counter-propagating chiral edge modes. The theoretical and the experimental search for such fractionalized particles continues to attract extensive attention. One reason for the enthusiasm is fundamental - as fractionalization can brilliantly exemplify the rich emergent long-range behavior that many-body systems can exhibit. Another reason is more pragmatic, as certain non-abelian fractionalized excitations form the basis of topological quantum computers that promise inherent immunity against errors. In this talk, I will present the role of neutral modes in the quantum Hall effect, as the highly sought after non-abelian excitations are often “chargeneutral.” Yet, there are bosonic neutral modes that plague the single-particle interferometers in the fractional quantum Hall regime.   Bio:  Education: • 2012: Ph. D. in Physics – S. N. Bose National Centre for Basic Sciences, Kolkata, India Thesis title: Studies of magnetic and transport properties of disordered systems • 2011–2013: Postdoctoral Fellow, Indian Institute of Science, Bangalore, India • 2013–2018: Postdoctoral Fellow, Weizmann Institute of Science, Rehovot, Israel • 2018 – 2019: Associate Research Scientist, Columbia University, Ney York, USA • From: 1 Jan 2020: Tenure Track Assistant Professor of Physics at EPFL   Please use the Zoom link below to attend virtually: https://osu.zoom.us/j/94858307115?pwd=K0JDMTROWVhIOUp6bU1sU0prZjNUZz09 Meeting ID: 948 5830 7115 Password: PRB1080   Zoom link below Department of Physics physics@osu.edu America/New_York public

Neutral modes in quantum Hall effect: Dr. Jekyll and Mr. Hyde

Prof. Mitali Banerjee
Laboratory of Quantum Physics, Topology and Correlations
École Polytechnique Fédérale de Lausanne, Switzerland

Virtual (link below)

Faculty Host: Nandini Trivedi

Mitali Banerjee

Abstract: Quantum Hall effects in 2D electron gas exemplify the earliest class of topological phases in solid state physics, characterized by an insulating bulk and gapless edge excitations. The quantum Hall effect has been a source of many concepts that have become essential in more general quantum many-body problems. The fractional quantum Hall states host fractional charges, neutral excitations, and unlike the integer quantum Hall states, they generally support counter-propagating chiral edge modes. The theoretical and the experimental search for such fractionalized particles continues to attract extensive attention. One reason for the enthusiasm is fundamental - as fractionalization can brilliantly exemplify the rich emergent long-range behavior that many-body systems can exhibit. Another reason is more pragmatic, as certain non-abelian fractionalized excitations form the basis of topological quantum computers that promise inherent immunity against errors. In this talk, I will present the role of neutral modes in the quantum Hall effect, as the highly sought after non-abelian excitations are often “chargeneutral.” Yet, there are bosonic neutral modes that plague the single-particle interferometers in the fractional quantum Hall regime.

 

Bio: 

Education:
• 2012: Ph. D. in Physics – S. N. Bose National Centre for Basic Sciences, Kolkata, India
Thesis title: Studies of magnetic and transport properties of disordered systems
• 2011–2013: Postdoctoral Fellow, Indian Institute of Science, Bangalore, India
• 2013–2018: Postdoctoral Fellow, Weizmann Institute of Science, Rehovot, Israel
• 2018 – 2019: Associate Research Scientist, Columbia University, Ney York, USA
• From: 1 Jan 2020: Tenure Track Assistant Professor of Physics at EPFL

 

Please use the Zoom link below to attend virtually:

https://osu.zoom.us/j/94858307115?pwd=K0JDMTROWVhIOUp6bU1sU0prZjNUZz09

Meeting ID: 948 5830 7115

Password: PRB1080