One-dimensional Fermi polaron in a combined harmonic and periodic potential

E.V.H. Doggen; A. Korolyuk; P. Törmä; J.J. Kinnunen

doi:10.1103/PhysRevA.89.053621

One-dimensional Fermi polaron in a combined harmonic and periodic potential

E.V.H. Doggen, A. Korolyuk, P. Törmä, J.J. Kinnunen

Tutkimustuotos: Lehtiartikkeli › Article › Scientific › vertaisarvioitu

14 Sitaatiot (Scopus)

366 Lataukset (Pure)

Abstrakti

We study an impurity in a one-dimensional potential consisting of a harmonic part and a periodic part using both the time-evolving block decimation (TEBD) algorithm and a variational ansatz. Attractive and repulsive contact interactions with a sea of fermions are considered. We find excellent agreement between TEBD and variational results and use the variational ansatz to investigate higher lattice bands. We conclude that the lowest band approximation fails at sufficiently strong interactions and develop a method for computing the Tan contact parameter.

Alkuperäiskieli	Englanti
Artikkeli	053621
Sivut	1-6
Sivumäärä	6
Julkaisu	Physical Review A
Vuosikerta	89
Numero	5
DOI - pysyväislinkit	https://doi.org/10.1103/PhysRevA.89.053621
Tila	Julkaistu - toukok. 2014
OKM-julkaisutyyppi	A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

Tutkimusalat

Hubbard model
impurities
Tan contact
tight-binding approximation
ultracold gases

Pääsy asiakirjaan

10.1103/PhysRevA.89.053621

PhysRevA.89Final published version, 198 KB

Muut tiedostot ja linkit

http://journals.aps.org/pra/abstract/10.1103/PhysRevA.89.053621

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abstract = "We study an impurity in a one-dimensional potential consisting of a harmonic part and a periodic part using both the time-evolving block decimation (TEBD) algorithm and a variational ansatz. Attractive and repulsive contact interactions with a sea of fermions are considered. We find excellent agreement between TEBD and variational results and use the variational ansatz to investigate higher lattice bands. We conclude that the lowest band approximation fails at sufficiently strong interactions and develop a method for computing the Tan contact parameter.",

keywords = "Hubbard model, impurities, Tan contact, tight-binding approximation, ultracold gases, Hubbard model, impurities, Tan contact, tight-binding approximation, ultracold gases, Hubbard model, impurities, Tan contact, tight-binding approximation, ultracold gases",

author = "E.V.H. Doggen and A. Korolyuk and P. T{\"o}rm{\"a} and J.J. Kinnunen",

year = "2014",

month = may,

doi = "10.1103/PhysRevA.89.053621",

language = "English",

volume = "89",

pages = "1--6",

journal = "Physical Review A",

issn = "1050-2947",

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T1 - One-dimensional Fermi polaron in a combined harmonic and periodic potential

AU - Doggen, E.V.H.

AU - Korolyuk, A.

AU - Törmä, P.

AU - Kinnunen, J.J.

PY - 2014/5

Y1 - 2014/5

N2 - We study an impurity in a one-dimensional potential consisting of a harmonic part and a periodic part using both the time-evolving block decimation (TEBD) algorithm and a variational ansatz. Attractive and repulsive contact interactions with a sea of fermions are considered. We find excellent agreement between TEBD and variational results and use the variational ansatz to investigate higher lattice bands. We conclude that the lowest band approximation fails at sufficiently strong interactions and develop a method for computing the Tan contact parameter.

AB - We study an impurity in a one-dimensional potential consisting of a harmonic part and a periodic part using both the time-evolving block decimation (TEBD) algorithm and a variational ansatz. Attractive and repulsive contact interactions with a sea of fermions are considered. We find excellent agreement between TEBD and variational results and use the variational ansatz to investigate higher lattice bands. We conclude that the lowest band approximation fails at sufficiently strong interactions and develop a method for computing the Tan contact parameter.

KW - Hubbard model

KW - impurities

KW - Tan contact

KW - tight-binding approximation

KW - ultracold gases

KW - Hubbard model

KW - impurities

KW - Tan contact

KW - tight-binding approximation

KW - ultracold gases

KW - Hubbard model

KW - impurities

KW - Tan contact

KW - tight-binding approximation

KW - ultracold gases

UR - http://journals.aps.org/pra/abstract/10.1103/PhysRevA.89.053621

U2 - 10.1103/PhysRevA.89.053621

DO - 10.1103/PhysRevA.89.053621

M3 - Article

SN - 1050-2947

VL - 89

SP - 1

EP - 6

JO - Physical Review A

JF - Physical Review A

IS - 5

M1 - 053621

ER -

One-dimensional Fermi polaron in a combined harmonic and periodic potential

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