Role of geometry in the superfluid flow of nonlocal photon fluids

David Vocke, Kali Wilson, Francesco Marino, Iacopo Carusotto, Ewan M Wright, Thomas Roger, Brian P Anderson, Patrik Öhberg, Daniele Faccio

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Recent work has unveiled a new class of optical systems that can exhibit the characteristic features of superfluidity. One such system relies on the repulsive photon-photon interaction that is mediated by a thermal optical nonlinearity and is therefore inherently nonlocal due to thermal diffusion. Here we investigate how such a nonlocal interaction, which at a first inspection would not be expected to lead to superfluid behavior, may be tailored by acting upon the geometry of the photon fluid itself. Our models and measurements show that restricting the laser profile and hence the photon fluid to a strongly elliptical geometry modifies thermal diffusion along the major beam axis and reduces the effective nonlocal interaction length by two orders of magnitude. This in turn enables the system to display a characteristic trait of superfluid flow: the nucleation of quantized vortices in the flow past an extended physical obstacle. These results are general and apply to other nonlocal fluids, such as dipolar Bose-Einstein condensates, and show that "thermal" photon superfluids provide an exciting and novel experimental environment for probing the nature of superfluidity, with applications to the study of quantum turbulence and analog gravity.

Original languageEnglish (US)
Article number013849
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume94
Issue number1
DOIs
StatePublished - Jul 28 2016

Fingerprint

superfluidity
fluids
photons
geometry
thermal diffusion
interactions
Bose-Einstein condensates
inspection
turbulence
nonlinearity
nucleation
vortices
analogs
gravitation
profiles
lasers

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Role of geometry in the superfluid flow of nonlocal photon fluids. / Vocke, David; Wilson, Kali; Marino, Francesco; Carusotto, Iacopo; Wright, Ewan M; Roger, Thomas; Anderson, Brian P; Öhberg, Patrik; Faccio, Daniele.

In: Physical Review A - Atomic, Molecular, and Optical Physics, Vol. 94, No. 1, 013849, 28.07.2016.

Research output: Contribution to journalArticle

Vocke, David ; Wilson, Kali ; Marino, Francesco ; Carusotto, Iacopo ; Wright, Ewan M ; Roger, Thomas ; Anderson, Brian P ; Öhberg, Patrik ; Faccio, Daniele. / Role of geometry in the superfluid flow of nonlocal photon fluids. In: Physical Review A - Atomic, Molecular, and Optical Physics. 2016 ; Vol. 94, No. 1.
@article{c50355016210440a8ae96056b353872c,
title = "Role of geometry in the superfluid flow of nonlocal photon fluids",
abstract = "Recent work has unveiled a new class of optical systems that can exhibit the characteristic features of superfluidity. One such system relies on the repulsive photon-photon interaction that is mediated by a thermal optical nonlinearity and is therefore inherently nonlocal due to thermal diffusion. Here we investigate how such a nonlocal interaction, which at a first inspection would not be expected to lead to superfluid behavior, may be tailored by acting upon the geometry of the photon fluid itself. Our models and measurements show that restricting the laser profile and hence the photon fluid to a strongly elliptical geometry modifies thermal diffusion along the major beam axis and reduces the effective nonlocal interaction length by two orders of magnitude. This in turn enables the system to display a characteristic trait of superfluid flow: the nucleation of quantized vortices in the flow past an extended physical obstacle. These results are general and apply to other nonlocal fluids, such as dipolar Bose-Einstein condensates, and show that {"}thermal{"} photon superfluids provide an exciting and novel experimental environment for probing the nature of superfluidity, with applications to the study of quantum turbulence and analog gravity.",
author = "David Vocke and Kali Wilson and Francesco Marino and Iacopo Carusotto and Wright, {Ewan M} and Thomas Roger and Anderson, {Brian P} and Patrik {\"O}hberg and Daniele Faccio",
year = "2016",
month = "7",
day = "28",
doi = "10.1103/PhysRevA.94.013849",
language = "English (US)",
volume = "94",
journal = "Physical Review A",
issn = "2469-9926",
publisher = "American Physical Society",
number = "1",

}

TY - JOUR

T1 - Role of geometry in the superfluid flow of nonlocal photon fluids

AU - Vocke, David

AU - Wilson, Kali

AU - Marino, Francesco

AU - Carusotto, Iacopo

AU - Wright, Ewan M

AU - Roger, Thomas

AU - Anderson, Brian P

AU - Öhberg, Patrik

AU - Faccio, Daniele

PY - 2016/7/28

Y1 - 2016/7/28

N2 - Recent work has unveiled a new class of optical systems that can exhibit the characteristic features of superfluidity. One such system relies on the repulsive photon-photon interaction that is mediated by a thermal optical nonlinearity and is therefore inherently nonlocal due to thermal diffusion. Here we investigate how such a nonlocal interaction, which at a first inspection would not be expected to lead to superfluid behavior, may be tailored by acting upon the geometry of the photon fluid itself. Our models and measurements show that restricting the laser profile and hence the photon fluid to a strongly elliptical geometry modifies thermal diffusion along the major beam axis and reduces the effective nonlocal interaction length by two orders of magnitude. This in turn enables the system to display a characteristic trait of superfluid flow: the nucleation of quantized vortices in the flow past an extended physical obstacle. These results are general and apply to other nonlocal fluids, such as dipolar Bose-Einstein condensates, and show that "thermal" photon superfluids provide an exciting and novel experimental environment for probing the nature of superfluidity, with applications to the study of quantum turbulence and analog gravity.

AB - Recent work has unveiled a new class of optical systems that can exhibit the characteristic features of superfluidity. One such system relies on the repulsive photon-photon interaction that is mediated by a thermal optical nonlinearity and is therefore inherently nonlocal due to thermal diffusion. Here we investigate how such a nonlocal interaction, which at a first inspection would not be expected to lead to superfluid behavior, may be tailored by acting upon the geometry of the photon fluid itself. Our models and measurements show that restricting the laser profile and hence the photon fluid to a strongly elliptical geometry modifies thermal diffusion along the major beam axis and reduces the effective nonlocal interaction length by two orders of magnitude. This in turn enables the system to display a characteristic trait of superfluid flow: the nucleation of quantized vortices in the flow past an extended physical obstacle. These results are general and apply to other nonlocal fluids, such as dipolar Bose-Einstein condensates, and show that "thermal" photon superfluids provide an exciting and novel experimental environment for probing the nature of superfluidity, with applications to the study of quantum turbulence and analog gravity.

UR - http://www.scopus.com/inward/record.url?scp=84979942227&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84979942227&partnerID=8YFLogxK

U2 - 10.1103/PhysRevA.94.013849

DO - 10.1103/PhysRevA.94.013849

M3 - Article

AN - SCOPUS:84979942227

VL - 94

JO - Physical Review A

JF - Physical Review A

SN - 2469-9926

IS - 1

M1 - 013849

ER -