Capacitive coupling of atomic systems to mesoscopic conductors.

Area of Science:

• Quantum Physics
• Atomic Physics
• Solid-State Physics

Background:

• Strong coupling between quantum systems is crucial for quantum information processing.
• Interfacing neutral atoms with solid-state devices presents a significant challenge.
• Rydberg states offer large electric dipole moments for strong interactions.

Purpose of the Study:

• To demonstrate a technique for strong, coherent coupling between isolated neutral atoms and mesoscopic conductors.
• To enable quantum state transfer and entanglement between atomic and solid-state systems.
• To explore applications in quantum simulation and quantum information science.

Main Methods:

• Exciting neutral atoms trapped above a superconducting transmission line into Rydberg states.
• Utilizing the large electric dipole moments of Rydberg atoms to induce voltage fluctuations.
• Employing a mechanism analogous to cavity quantum electrodynamics for coupling.

Main Results:

• Achieved strong, coherent coupling between neutral atoms and a mesoscopic conductor.
• Demonstrated transfer of atomic states to a long-lived mode of fluctuating voltage.
• Showcased entanglement of atoms separated by millimeters.
• Successfully mapped quantum states between solid-state devices and atomic/photonic states.

Conclusions:

• The described technique provides a robust platform for interfacing neutral atoms with solid-state devices.
• This method facilitates quantum state transfer and entanglement, opening new avenues for quantum technologies.
• The approach is analogous to cavity quantum electrodynamics, offering a versatile tool for quantum information processing.