Artificial topotronics: towards robust quantum circuits for secure communication and decoherence-free computation

Zoom meeting

ID: 829 2306 2934

key: 887180

Topological superconductors with a superconducting gap in their bulk and protected metallic states on their edges and surfaces host exotic quasiparticles such as anyons and Majorana fermions. They have been proposed for manipulation and application in topological electronics (topotronics) and fault-tolerant quantum processing and computing because a pair of Majorana zero modes (MZMs) works as a nonlocal qubit.

In the first section of my talk, I will present (i) the fabrication methods of two types of artificially engineered hybrid superconducting circuits with Josephson junctions and field-effect transistors, and (ii) sub-Kelvin temperature/magnetic field B dependent DC-RF quantum transport measurements. I demonstrate that the 2D Josephson junctions under small vertical magnetic fields (B < 100 mT) show quantized magnetoconductance plateaus due to topological phase transitions to nontrivial phases hosting MZMs.

In the second part of my talk, I will discuss Josephson junction based solid-state, integrated and ultra-broadband superconducting THz lasers, hybrid meta-photonic circuitry, and nano/micro antennas for applications in on-chip communication and quantum computation.

Contact details:

Llorenç Serra
971 17 28 05
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