Frequency-Resolved Purcell Effect for the Dissipative Generation of Steady-State Entanglement

Area of Science:

• Quantum physics
• Quantum optics
• Solid-state physics

Background:

• Entangled W states are crucial for quantum information processing due to their robustness against qubit loss.
• Generating and stabilizing these states in strongly interacting quantum systems remains a significant challenge.

Purpose of the Study:

• To present a novel driven-dissipative mechanism for generating stationary entangled W states.
• To enable the scalable stabilization of quantum states in dissipative quantum platforms.

Main Methods:

• Utilizing a cavity Quantum Electrodynamics (QED) setup with strongly interacting quantum emitters.
• Driving the ensemble to its highest energy state, followed by cavity-enhanced decay.
• Leveraging the nonharmonic energy structure of the ensemble to resonantly select the desired transition.

Main Results:

• Demonstrated a mechanism to generate stationary entangled W states.
• Showcased a purely dissipative pathway to a robust entangled steady state.
• Identified cavity-enhanced decay as key to stabilizing the W state.

Conclusions:

• The proposed driven-dissipative mechanism offers a viable route to create robust entangled W states.
• This method is observable in current solid-state cavity QED systems.
• Opens new avenues for scalable quantum state stabilization in dissipative systems.