Three-electron dynamics of the interparticle Coulombic decay with two-dimensional continuum confinement

Area of Science:

• Quantum Information Science
• Condensed Matter Physics
• Materials Science

Background:

• Electronically excited quantum dots can undergo interparticle Coulombic decay (ICD).
• ICD involves electron emission from one quantum dot due to Coulombic interactions with an excited neighbor.
• Previous studies focused primarily on pairs of quantum dots.

Purpose of the Study:

• To investigate the extension of interparticle Coulombic decay (ICD) to systems involving three quantum dots.
• To quantify the effect of a third quantum dot on the ICD rate.
• To validate theoretical predictions for ICD in multi-dot systems.

Main Methods:

• Theoretical modeling using the analytical Wigner-Weisskopf rate equation.
• Numerical simulations of electron dynamics using the multiconfiguration time-dependent Hartree (MCTDH) method.
• Implementation of OpenACC for graphic card compilation to handle computational demands.

Main Results:

• Interparticle Coulombic decay (ICD) is confirmed to operate effectively in systems of three quantum dots.
• A second electron-emitting quantum dot increases the ICD rate by a factor of two.
• Theoretical predictions align with simulations across diverse quantum dot arrangements and distances.

Conclusions:

• The study demonstrates that interparticle Coulombic decay (ICD) is scalable to three-quantum dot systems.
• The observed rate enhancement provides crucial insights into electron dynamics in nanoscale assemblies.
• Efficient computational methods enable the study of complex quantum phenomena in multi-dot systems.