REVIEW 7 cited by
Impurities and polarons in bosonic quantum gases: a review on recent progress
Not yet reviewed by Pith; the record is open.
This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.
SPECIMEN: schema-true, not a live event
T0 review · schema-true
One-sentence machine reading of the paper's core claim.
pith:XXXXXXXX · record.json · timestamp
read the original abstract
This review describes the field of Bose polarons, arising when mobile impurities are immersed into a bosonic quantum gas. The latter can be realized by a Bose-Einstein condensate (BEC) of ultracold atoms, or of exciton polaritons in a semiconductor, which has led to a series of experimental observations of Bose polarons near inter-species Feshbach resonances that we survey. Following an introduction to the topic, with references to its historic roots and a presentation of the Bose polaron Hamiltonian, we summarize state-of-the-art experiments. Next we provide a detailed discussion of polaron models, starting from the ubiquitous Fr\"ohlich Hamiltonian that applies at weak couplings. We proceed by a survey of concurrent theoretical methods used for solving strongly interacting Bose polaron problems. The subsequent sections are devoted to the large bodies of work investigating strong coupling Bose polarons, including detailed comparisons with radio-frequency (RF) spectra obtained in ultracold atom experiments; to investigations of universal few-body and Efimov states associated with a Feshbach resonance in atomic mixtures; to studies of quantum dynamics and polarons out of equilibrium; Bose polarons in low-dimensional; induced interactions among polarons and bipolaron formation; and to Bose polarons at non-zero temperatures. We end our review by detailed discussions of closely related experimental setups and systems, including ionic impurities, systems with strong light-matter interactions, and variations and extensions of the Bose polaron concepts e.g. to baths with topological order or strong interactions relevant for correlated electrons. Finally, an outlook is presented, highlighting possible future research directions and open questions in the field as a whole.
Forward citations
Cited by 7 Pith papers
-
Lattice Bose polarons at strong coupling and quantum criticality
A strong-coupling ladder theory for an impurity in a Bose-Hubbard bath near the MI-SF critical point predicts a cusp and a new polaron branch, with energies in good agreement with quantum Monte Carlo.
-
Tensor network algorithm to solve polaron impurity problems
The authors extend the Grassmann time-evolving matrix product operator method to polaron impurity problems by converting the phonon influence functional into a scalar reweighting of the fermionic path-integral tensor.
-
Quantum impurities in finite-temperature Bose gases: Detecting vortex proliferation across the BKT and BEC transitions
A repulsively coupled impurity in a finite-temperature Bose gas develops an attractive spectral line when it binds to vortices and density holes, providing a potential local probe of vortex proliferation across the BK...
-
Polaronic dressing of bound states
Polaronic dressing from a Bose-Einstein condensate destroys a loosely bound dimer of two impurity atoms while a tightly bound dimer survives, with the crossover set by the ratio of dimer binding energy to polaron energy.
-
Operator Valued Flow Equation Approach to the Bosonic Lattice Polaron: Dispersion Renormalization Beyond the Fr\"ohlich Paradigm
Two-phonon scattering terms in a lattice Bose polaron can significantly alter the dispersion and may produce a bound state not present in Fröhlich-type single-phonon models.
-
Properties of a static dipolar impurity in a 2D dipolar BEC
Using Gross-Pitaevskii simulations, the authors show that a dipolar impurity's self-energy grows with atom number and is minimized when the trap is elongated along the dipole orientation.
-
Polaron catastrophe within quantum acoustics
In a coherent-state model with electron backaction, a single electron self-traps into an acoustic polaron at temperatures below about 20 K and radiates the released energy as lattice waves.
Discussion (0). Continue with ORCID to comment.