• DOI:10.1103/PhysRevLett.127.033401
• Corpus ID: 231918406

Quantum Behavior of a Heavy Impurity Strongly Coupled to a Bose Gas.

@article{Levinsen2021QuantumBO,
  title={Quantum Behavior of a Heavy Impurity Strongly Coupled to a Bose Gas.},
  author={Jesper Levinsen and Luis A. Pe{\~n}a Ardila and Shuhei M. Yoshida and Meera M. Parish},
  journal={Physical review letters},
  year={2021},
  volume={127 3},
  pages={
          033401
        }
}

• J. Levinsen, L. A. P. Ardila, +1 author M. Parish
• Published 12 February 2021
• Physics
• Physical review letters

We investigate the problem of an infinitely heavy impurity interacting with a dilute Bose gas at zero temperature. When the impurity-boson interactions are short-ranged, we show that boson-boson interactions induce a quantum blockade effect, where a single boson can effectively block or screen the impurity potential. Since this behavior depends on the quantum granular nature of the Bose gas, it cannot be captured within a standard classical-field description. Using a combination of exact quantum Monte Carlo methods and a truncated basis approach, we show how the quantum correlations between bosons lead to universal few-body bound states and a logarithmically slow dependence of the polaron ground-state energy on the boson-boson scattering length. Moreover, we expose the link between the polaron energy and the spatial structure of the quantum correlations, spanning the infrared to ultraviolet physics.