Pseudospin Quantum Computation in Semiconductor Nanostructures

TL;DR

This paper proposes a theoretical framework for pseudospin quantum computation using bilayer quantum Hall droplets in semiconductor nanostructures, highlighting potential robustness and fault tolerance with low decoherence.

Contribution

It introduces a novel approach to quantum computation leveraging interlayer coherence and a quantum Ising model in semiconductor nanostructures.

Findings

Decoherence estimated to be very small (~10^{-5})

Voltage-tuned gates enable qubit control

Quantum Ising Hamiltonian facilitates qubit entanglement

Abstract

We theoretically show that spontaneously interlayer-coherent bilayer quantum Hall droplets should allow robust and fault-tolerant pseudospin quantum computation in semiconductor nanostructures with voltage-tuned external gates providing qubit control and a quantum Ising Hamiltonian providing qubit entanglement. Using a spin-boson model we estimate decoherence to be small $(\sim 10^{-5})$.