A high-N00N output of harmonically driven cavity QED

Area of Science:

• Quantum Information Science
• Quantum Optics
• Cavity Quantum Electrodynamics (QED)

Background:

• Entangled states are crucial for advancing quantum technologies, particularly for high-precision measurements.
• Cavity QED systems offer a controlled environment for manipulating quantum states.
• Achieving Heisenberg-limit precision in quantum measurements requires specific entangled states, such as N00N states.

Purpose of the Study:

• To demonstrate a harmonically driven cavity QED system capable of generating a wide range of maximally entangled states.
• To show that this system can function as a quantum beam splitter for creating N00N states.
• To explore the potential for generating multimode N00N-type entanglement using a network of these systems.

Main Methods:

• Utilizing a cavity QED system composed of two cavities and a two-level qubit.
• Employing harmonic driving to control the system's dynamics.
• Analyzing the system's output to identify the generation of entangled states, specifically N00N states.

Main Results:

• The proposed cavity QED system successfully generates a vast class of maximally entangled states.
• The system operates as a quantum beam splitter, transforming an input state into a maximally entangled N00N state.
• A network configuration of these quantum beam splitters can produce multimode N00N-type entanglement.

Conclusions:

• The harmonically driven cavity QED system is a powerful tool for generating entangled states for Heisenberg-limit precision measurements.
• The quantum beam splitter functionality enables the creation of N00N states, vital for enhanced metrology.
• This work paves the way for scalable sources of multimode entanglement for advanced quantum applications.