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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

p-Wave polaron.

Jesper Levinsen¹, Pietro Massignan, Frédéric Chevy

¹T.C.M. Group, Cavendish Laboratory, Cambridge, United Kingdom. jfl36@cam.ac.uk

Physical Review Letters

|September 26, 2012

Summary

This summary is machine-generated.

We studied a single impurity in a Fermi sea near a p-wave Feshbach resonance. A magnetic field induced anisotropic impurity dispersion and a third polaron branch, offering tunable effective masses.

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Published on: February 23, 2017

Area of Science:

Quantum physics
Ultracold atomic gases

Background:

Interactions between atoms and impurities are crucial in quantum systems.
Feshbach resonances allow tuning of these interactions.
Polarons describe quasiparticles formed by an impurity interacting with a quantum medium.

Purpose of the Study:

Investigate the behavior of a single impurity in a Fermi sea near a p-wave Feshbach resonance.
Analyze the impurity's dispersion and spectral response under magnetic field influence.
Explore novel phenomena arising from dipolar interactions and magnetic fields.

Main Methods:

Theoretical calculation of impurity dispersion and spectral response.
Analysis of a single impurity in a Fermi sea.
Consideration of interspecies p-wave Feshbach resonance and magnetic fields.

Main Results:

Observed a third polaron branch in the excitation spectrum, beyond attractive and repulsive polarons.
Discovered anisotropic impurity dispersion with distinct effective masses parallel and perpendicular to the magnetic field.
Demonstrated tunability of anisotropy and effective masses by magnetic field strength.

Conclusions:

Dipolar interactions in a magnetic field lead to unique polaron properties.
Anisotropic effective masses can be tuned and even exhibit opposite signs or be smaller than the bare mass.
This system provides a novel platform for exploring quantum many-body physics and polaron physics.