Realizing total reciprocity violation in the phase for photon scattering

Area of Science:

• Quantum mechanics
• Wave-particle duality
• Condensed matter physics

Background:

• Reciprocity describes a symmetry in scattering processes, fundamental to wave and quantum mechanics.
• While generally observed, reciprocity can be violated, particularly in polarization-dependent scattering.
• Phase violation is experimentally challenging compared to magnitude violation.

Purpose of the Study:

• To experimentally measure maximal reciprocity violation in the phase of scattering amplitudes.
• To explore the implications of reciprocity violation in diverse physical systems.
• To develop novel experimental techniques for probing scattering phase information.

Main Methods:

• Utilized nuclear resonance scattering of synchrotron radiation for its advantageous properties.
• Implemented a novel stroboscopic detection technique to access phase information.
• Devised a scattering setup based on a generalized reciprocity theorem.

Main Results:

• Achieved maximal (180-degree) violation of reciprocity in the scattering amplitude phase.
• Demonstrated the feasibility of observing phase violation, previously a significant experimental hurdle.
• Validated a new experimental approach for studying reciprocity.

Conclusions:

• The findings confirm the possibility of significant reciprocity phase violation.
• The developed methods pave the way for new reciprocity-related devices and applications.
• This work deepens the understanding of fundamental symmetries in scattering phenomena.