Phase-controlled coherent photons for the quantum correlations in a delayed-choice quantum eraser scheme

Area of Science:

• Quantum optics
• Quantum sensing
• Wave-particle duality

Background:

• The delayed-choice quantum eraser explores wave-particle duality for single photons.
• Super-resolution techniques aim to surpass the standard quantum limit in quantum sensing.
• Previous super-resolution methods utilized entangled photons or classical coherent photons.

Purpose of the Study:

• To introduce a novel method for classically excited super-resolution.
• To apply this method to phase-controlled coherent photons within a modified quantum eraser scheme.
• To investigate the underlying physics, including nonlocal correlations.

Main Methods:

• Utilizing a quarter-wave plate-modified quantum eraser.
• Employing phase-controlled coherent photons for classical excitation.
• Implementing selective product-basis measurements for frequency-polarization control.

Main Results:

• Demonstration of classically excited super-resolution in the quantum eraser.
• Observation of nonlocal correlations supporting the super-resolution mechanism.
• Successful control over frequency-polarization bases.

Conclusions:

• The presented method offers a new route to classical super-resolution in quantum optics.
• This technique enhances quantum sensing capabilities by overcoming standard limits.
• Nonlocal correlations play a key role in the observed super-resolution phenomenon.