A universal matter-wave interferometer with optical ionization gratings in the time-domain

Area of Science:

• Quantum physics
• Atomic and molecular physics
• Nanoparticle science

Background:

• Matter-wave interferometry with atoms and molecules is crucial for fundamental quantum studies and precision measurements.
• Existing interferometry techniques rely on splitting and rejoining quantum states to observe interference patterns.

Purpose of the Study:

• To experimentally realize a universal near-field interferometer.
• To demonstrate quantum interference with fast molecular clusters using novel gratings.

Main Methods:

• Utilized three short-pulse single-photon ionization gratings to create a near-field interferometer.
• Observed quantum interference of fast molecular clusters with a composite de Broglie wavelength.

Main Results:

• Achieved quantum interference with molecular clusters, exhibiting a de Broglie wavelength as small as 275 fm.
• Developed optical ionization gratings that are universally applicable to various nanoparticles.
• The interferometer demonstrated sensitivity to nanometer-scale fringe shifts and robustness against velocity-dependent phase shifts.

Conclusions:

• The developed universal near-field interferometer enables quantum interference in molecular clusters.
• Optical ionization gratings offer a versatile tool for nanoparticle interferometry, applicable from atoms to nanospheres.
• The time-domain nature of the gratings enhances robustness, advancing quantum measurement capabilities.