Generation of robust entanglement in plasmonically coupled quantum dots driven by quantum squeezed light

Area of Science:

• Quantum Optics
• Condensed Matter Physics
• Quantum Information Science

Background:

• Dissipation in quantum systems poses challenges for generating entanglement.
• Entanglement is crucial for quantum technologies but difficult to maintain in open systems.

Purpose of the Study:

• To investigate if quantum light can reliably generate entanglement in dissipative quantum systems.
• To explore methods for robust entangled-state preparation.

Main Methods:

• Cavity quantum electrodynamics calculations were performed.
• A single-mode squeezed light source was used to interact with a plasmonically coupled pair of quantum dots.
• Entanglement was quantified using concurrence.

Main Results:

• Steady-state entanglement between quantum dots was robustly generated using squeezed light.
• Continuous squeezing improved entanglement compared to pulsed sources.
• Entanglement generation was robust against variations in system parameters, not requiring fine-tuning of plasmon-quantum dot coupling.

Conclusions:

• Squeezed light offers a reliable method for generating robust entanglement in open quantum systems.
• This approach provides a new perspective for creating entangled states in challenging environments.
• The findings have implications for the development of quantum technologies.