Universal Feature in Optical Control of a p-wave Feshbach Resonance

TL;DR

This paper demonstrates universal behavior in the optical control of p-wave Feshbach resonances, revealing a simple formula for resonance shifts and showing the ratio of key parameters is largely universal across different magnetic sublevels.

Contribution

It introduces a universal ratio for the sensitivity of p-wave Feshbach resonances to optical control across different magnetic sublevels, supported by experimental and theoretical evidence.

Findings

The resonance shift depends on laser detuning via a simple formula.

The ratio of parameters for different m states is largely universal.

Optical control enables complex few- and many-body phenomena.

Abstract

In this Letter we report the experimental results on optical control of a p-wave Feshbach resonance, by utilizing a laser driven bound-to-bound transition to shift the energy of closed channel molecule. The magnetic field location for p-wave resonance as a function of laser detuning can be captured by a simple formula with essentially one parameter, which describes how sensitive the resonance depends on the laser detuning. The key result of this work is to demonstrate, both experimentally and theoretically, that the ratio between this parameter for $m=0$ resonance and that for $m=\pm 1$ resonance, to large extent, is universal. We also show that this optical control can create intriguing situations where interesting few- and many-body physics can occurs, such as a p-wave resonance overlapping with an s-wave resonance or three p-wave resonances being degenerate.