Interplay of charge noise and coupling to phonons in adiabatic electron transfer between quantum dots

Understand

Long-distance transfer of quantum information in architectures based on quantum dot spin qubits will be necessary for their scalability.

• One way of achieving it is to simply move the electron between two quantum registers.
• Precise control over the electron shuttling through a chain of tunnel-coupled quantum dots is possible when interdot energy detunings are changed adiabatically.
• Deterministic character of shuttling is however endangered by coupling of the transferred electron to thermal reservoirs: sources of fluctuations of electric fields, and lattice vibrations.