Atoms in separated resonators can jointly absorb a single photon

Area of Science:

• Quantum optics
• Quantum information science
• Cavity quantum electrodynamics

Background:

• Theoretical prediction of simultaneous multi-qubit excitation by a single photon in a single resonator.
• Exploration of quantum phenomena in coupled resonator arrays.

Purpose of the Study:

• Investigate simultaneous photon-induced excitation of two qubits in separate, coupled resonators.
• Determine conditions for high-probability simultaneous excitation.
• Analyze causality in multi-resonator quantum systems.

Main Methods:

• Theoretical modeling of a system with two qubits in two or three coupled resonators.
• Simulation of different excitation schemes and resonator configurations.
• Analysis of photon-induced excitation probabilities.

Main Results:

• Simultaneous excitation of two qubits in different resonators is possible with probability approaching one.
• Success of the process depends on specific resonator couplings and excitation schemes.
• Identified conditions that facilitate high-fidelity simultaneous excitation.

Conclusions:

• The theoretical prediction of simultaneous multi-qubit excitation extends to systems with spatially separated qubits in coupled resonators.
• The findings offer insights into the fundamental principles of quantum causality in complex quantum systems.
• This work paves the way for advanced quantum control and information processing schemes.