Selective protected state preparation of coupled dissipative quantum emitters

Area of Science:

• Quantum optics
• Quantum information science
• Atomic physics

Background:

• Interactions in quantum emitter ensembles cause energy and lifetime variations.
• These variations typically lead to rapid decay and dephasing.
• Special entangled collective states exhibit minimal decay and are valuable for applications.

Purpose of the Study:

• To investigate efficient preparation schemes for subradiant entangled states in coupled quantum emitters.
• To explore methods for enhancing the fidelity and entanglement depth of these prepared states.

Main Methods:

• Studying preparation schemes for entangled states in a chain of dipole-dipole coupled emitters.
• Utilizing specific laser frequencies, power, and geometry.
• Employing control fields, spatial excitation phase engineering, and tailored magnetic fields.

Main Results:

• Demonstrated efficient preparation of strongly subradiant entangled states.
• Showcased improvement in state fidelity and entanglement depth through advanced techniques.
• Identified optimal laser and control field configurations for state preparation.

Conclusions:

• Efficient preparation of highly entangled, low-decay quantum states is achievable.
• Spatial excitation phase engineering and magnetic fields enhance state quality.
• These precisely prepared states hold promise for quantum spectroscopy, precision measurements, and quantum information storage.