Direct observation of a breit-wigner phase of a wave function

Area of Science:

• Quantum mechanics
• Molecular physics
• Atomic, molecular, and optical physics

Background:

• Quantum mechanical wave functions possess phase information crucial for describing molecular dynamics.
• Interference phenomena are fundamental to observing and measuring quantum states.

Purpose of the Study:

• To experimentally determine the Breit-Wigner phase of a molecular wave function.
• To develop a method for measuring quantum mechanical phase shifts in molecular ionization.

Main Methods:

• Utilizing the interference between two independent ionization pathways of a molecule.
• Introducing the state of interest into only one ionization path to induce a measurable phase shift.
• Employing analytical theory to extract the wave function's phase from the observed signal.

Main Results:

• Successfully obtained the Breit-Wigner phase by analyzing the interference pattern.
• Demonstrated that a phase shift in the observed signal directly correlates with the wave function's phase.
• Validated the analytical theory's capability in determining quantum phase information.

Conclusions:

• The interference measurement technique provides a viable method for quantifying the Breit-Wigner phase.
• This approach allows for precise determination of quantum mechanical phase shifts in molecular systems.
• The study highlights the importance of phase information in understanding molecular ionization processes.