Quantbot Hosts a Second NYC Quantum Computing Meetup!

On Monday February 12th, Quantbot had the opportunity to facilitate this month’s NYC Quantum Computing meetup in our office. This month’s presenter, Mani Chandra from nOhm, presented about “Efficient non-Ohmic Charge Transport in Two-dimensional semiconductors.”

Mani Chandra is the CEO of nOhm Devices, a new startup at MIT. He has a PhD in high-energy astrophysics from the University of Illinois. Some of his achievements include being awarded the Astronomy Department’s Chu award for research excellence and the Illinois Distinguished Fellow from the Urbana- Champaign.

Many people showed up to tonight’s talk and were able to collaborate and share their thoughts on the topic.

Here is a synopsis of tonight’s presenation: Charge transport in semiconductors is usually diffusive (“Ohmic”) due to electrons scattering off defects and phonons, as described by the textbook Ohm’s law. However, in sufficiently clean two-dimensional materials, Ohm’s law breaks down and gives rise to novel “non-Ohmic” charge transport regimes wherein electrons flow like a fluid. These novel regimes – ballistic and hydrodynamic transport – allow for the creation of highly-efficient electronic devices, with much lower power consumption and heat dissipation compared to current generation electronics (which are based on field-effect transistors). I will present an overview of transport physics in semiconductors and talk about our efforts to use non-Ohmic charge transport to design highly-efficient readout electronics that can be co-located with qubits and various quantum sensors in the innermost cryostage of dilution refrigerators, where the cooling power is limited to ~1 mW. The resulting integrated cryogenic electronics will enable the scaling up of quantum systems, similar to the historical progression from discrete transistors to integrated circuits.