# 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 } }

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…

## 10 Citations

Artificial atoms from cold bosons in one dimension

- Physics
- 2022

We investigate the ground-state properties of weakly repulsive onedimensional bosons in the presence of an attractive zero-range impurity potential. First, we derive mean-field solutions to the…

Strongly interacting impurities in a dilute Bose condensate

- Physics
- 2022

An impurity in a Bose gas is commonly referred to as Bose polaron. For a dilute Bose gas its properties are expected to be universal, that is dependent only on a few parameters characterizing the…

Repulsive Fermi and Bose Polarons in Quantum Gases

- Physics
- 2022

Polaron quasiparticles are formed when a mobile impurity is coupled to the elementary excitations of a many-particle background. In the ﬁeld of ultracold atoms, the study of the associated impurity…

Mobile impurity in a one-dimensional quantum gas: Exact diagonalization in the Bethe Ansatz basis

- Physics
- 2021

We consider a mobile impurity particle injected into a one-dimensional quantum gas. The time evolution of the system strongly depends on whether the mass of the impurity and the masses of the host…

Disorder in order: localization in a randomless cold atom system

- Physics
- 2021

We present a mapping between the Edwards model of disorder describing the motion of a single particle subject to randomly-positioned static scatterers and the Bose polaron problem of a light quantum…

Self-stabilized Bose polarons

- Physics
- 2021

The mobile impurity in a Bose-Einstein condensate (BEC) is a paradigmatic many-body problem. For weak interaction between the impurity and the BEC, the impurity deforms the BEC only slightly and it…

Observation of $1/k^4$-tails in the asymptotic momentum distribution of Bose polarons

- Physics
- 2022

We measure the asymptotic momentum density in a Bose-Einstein condensate with dilute spin impurities, after an expansion in the presence of interactions. In the absence of impurities, we conﬁrm the…

Static Impurities in a Weakly Interacting Bose Gas

- PhysicsAtoms
- 2022

We present a comprehensive discussion of the ground-state properties of dilute D-dimensional Bose gas interacting with a few static impurities. Assuming the short-ranged character of the…

Disorder in order: Localization without randomness in a cold-atom system

- PhysicsPhysical Review A
- 2022

Félix Rose1, 2, 3, ∗ and Richard Schmidt4, 5 1Max Planck Institute of Quantum Optics, Hans-Kopfermann-Straße 1, 85748 Garching, Germany 2Munich Center for Quantum Science and Technology,…

Mediated interaction between polarons in a one-dimensional Bose gas

- PhysicsPhysical Review A
- 2022

We study a weakly-interacting one-dimensional Bose gas with two impurities coupled locally to the boson density. We derive analytical results for the induced interaction between the impurities at…

## References

SHOWING 1-10 OF 52 REFERENCES

Quasiparticle Properties of a Mobile Impurity in a Bose-Einstein Condensate.

- PhysicsPhysical review letters
- 2015

A systematic perturbation theory for the quasiparticle properties of a single impurity immersed in a Bose-Einstein condensate is developed, which cannot be obtained within the canonical Fröhlich model of an impurity interacting with phonons.

Few-body states of bosons interacting with a heavy quantum impurity

- PhysicsPhysical Review A
- 2018

We consider the problem of a fixed impurity coupled to a small number $N$ of non-interacting bosons. We focus on impurity-boson interactions that are mediated by a closed-channel molecule, as is the…

Impurity-Induced Multibody Resonances in a Bose Gas.

- PhysicsPhysical review letters
- 2018

It is shown that a dynamical impurity-boson interaction, mediated by a closed-channel dimer, can induce an effective boson-bosons repulsion which strongly modifies the bound states consisting of the impurity and N bosons, resulting in two universal "multibody" resonances.

Ionic polaron in a Bose-Einstein condensate

- Physics
- 2020

The presence of strong interactions in a many-body quantum system can lead to a variety of exotic effects. Here we show that even in a comparatively simple setup consisting of a charged impurity in a…

Impurity in a Bose-Einstein condensate: Study of the attractive and repulsive branch using quantum Monte Carlo methods

- Physics
- 2015

We investigate the properties of an impurity immersed in a dilute Bose gas at zero temperature using quantum Monte-Carlo methods. The interactions between bosons are modeled by a hard sphere…

Observation of Attractive and Repulsive Polarons in a Bose-Einstein Condensate.

- PhysicsPhysical review letters
- 2016

Radio frequency spectroscopy of ultracold bosonic ^{39}K atoms is used to experimentally demonstrate the existence of a well-defined quasiparticle state of an impurity interacting with a BEC, and finds excellent agreement with theories that incorporate three-body correlations, both in the weak-coupling limits and across unitarity.

Impurity in a Bose-Einstein Condensate and the Efimov Effect.

- PhysicsPhysical review letters
- 2015

It is shown that the energy and quasiparticle residue of the dressed impurity (polaron) are significantly lowered by three-body correlations, even for weak interactions where there is no Efimov trimer state in a vacuum.

Bose Polarons in the Strongly Interacting Regime.

- PhysicsPhysical review letters
- 2016

The energy, spectral width, and lifetime of the resultant polaron on both the attractive and the repulsive branches in the strongly interacting regime are characterized through the use of a Feshbach resonance and radio-frequency spectroscopy.

Universality of an impurity in a Bose-Einstein condensate

- Physics
- 2017

Universality is a powerful concept in physics, allowing one to construct physical descriptions of systems that are independent of the precise microscopic details or energy scales. A prime example is…

Strong coupling Bose polarons in a two-dimensional gas

- Physics
- 2020

We study the ground state properties of Bose polarons in a two dimensional geometry using quantum Monte Carlo techniques. Results for the binding energy, the effective mass and the quasiparticle…