---
_id: '5983'
abstract:
- lang: eng
text: We study a quantum impurity possessing both translational and internal rotational
degrees of freedom interacting with a bosonic bath. Such a system corresponds
to a “rotating polaron,” which can be used to model, e.g., a rotating molecule
immersed in an ultracold Bose gas or superfluid helium. We derive the Hamiltonian
of the rotating polaron and study its spectrum in the weak- and strong-coupling
regimes using a combination of variational, diagrammatic, and mean-field approaches.
We reveal how the coupling between linear and angular momenta affects stable quasiparticle
states, and demonstrate that internal rotation leads to an enhanced self-localization
in the translational degrees of freedom.
article_number: '224506'
article_processing_charge: No
author:
- first_name: Enderalp
full_name: Yakaboylu, Enderalp
id: 38CB71F6-F248-11E8-B48F-1D18A9856A87
last_name: Yakaboylu
orcid: 0000-0001-5973-0874
- first_name: Bikashkali
full_name: Midya, Bikashkali
id: 456187FC-F248-11E8-B48F-1D18A9856A87
last_name: Midya
- first_name: Andreas
full_name: Deuchert, Andreas
id: 4DA65CD0-F248-11E8-B48F-1D18A9856A87
last_name: Deuchert
orcid: 0000-0003-3146-6746
- first_name: Nikolai K
full_name: Leopold, Nikolai K
id: 4BC40BEC-F248-11E8-B48F-1D18A9856A87
last_name: Leopold
orcid: 0000-0002-0495-6822
- first_name: Mikhail
full_name: Lemeshko, Mikhail
id: 37CB05FA-F248-11E8-B48F-1D18A9856A87
last_name: Lemeshko
orcid: 0000-0002-6990-7802
citation:
ama: 'Yakaboylu E, Midya B, Deuchert A, Leopold NK, Lemeshko M. Theory of the rotating
polaron: Spectrum and self-localization. Physical Review B. 2018;98(22).
doi:10.1103/physrevb.98.224506'
apa: 'Yakaboylu, E., Midya, B., Deuchert, A., Leopold, N. K., & Lemeshko, M.
(2018). Theory of the rotating polaron: Spectrum and self-localization. Physical
Review B. American Physical Society. https://doi.org/10.1103/physrevb.98.224506'
chicago: 'Yakaboylu, Enderalp, Bikashkali Midya, Andreas Deuchert, Nikolai K Leopold,
and Mikhail Lemeshko. “Theory of the Rotating Polaron: Spectrum and Self-Localization.”
Physical Review B. American Physical Society, 2018. https://doi.org/10.1103/physrevb.98.224506.'
ieee: 'E. Yakaboylu, B. Midya, A. Deuchert, N. K. Leopold, and M. Lemeshko, “Theory
of the rotating polaron: Spectrum and self-localization,” Physical Review B,
vol. 98, no. 22. American Physical Society, 2018.'
ista: 'Yakaboylu E, Midya B, Deuchert A, Leopold NK, Lemeshko M. 2018. Theory of
the rotating polaron: Spectrum and self-localization. Physical Review B. 98(22),
224506.'
mla: 'Yakaboylu, Enderalp, et al. “Theory of the Rotating Polaron: Spectrum and
Self-Localization.” Physical Review B, vol. 98, no. 22, 224506, American
Physical Society, 2018, doi:10.1103/physrevb.98.224506.'
short: E. Yakaboylu, B. Midya, A. Deuchert, N.K. Leopold, M. Lemeshko, Physical
Review B 98 (2018).
date_created: 2019-02-14T10:37:09Z
date_published: 2018-12-12T00:00:00Z
date_updated: 2023-09-19T14:29:03Z
day: '12'
department:
- _id: MiLe
- _id: RoSe
doi: 10.1103/physrevb.98.224506
ec_funded: 1
external_id:
arxiv:
- '1809.01204'
isi:
- '000452992700008'
intvolume: ' 98'
isi: 1
issue: '22'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1809.01204
month: '12'
oa: 1
oa_version: Preprint
project:
- _id: 25681D80-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '291734'
name: International IST Postdoc Fellowship Programme
- _id: 25C6DC12-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '694227'
name: Analysis of quantum many-body systems
publication: Physical Review B
publication_identifier:
eissn:
- 2469-9969
issn:
- 2469-9950
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Theory of the rotating polaron: Spectrum and self-localization'
type: journal_article
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 98
year: '2018'
...
---
_id: '435'
abstract:
- lang: eng
text: It is shown that two fundamentally different phenomena, the bound states in
continuum and the spectral singularity (or time-reversed spectral singularity),
can occur simultaneously. This can be achieved in a rectangular core dielectric
waveguide with an embedded active (or absorbing) layer. In such a system a two-dimensional
bound state in a continuum is created in the plane of a waveguide cross section,
and it is emitted or absorbed along the waveguide core. The idea can be used for
experimental implementation of a laser or a coherent-perfect-absorber for a photonic
bound state that resides in a continuous spectrum.
acknowledgement: 'Seventh Framework Programme (FP7) People: Marie-Curie Actions (PEOPLE)
(291734). B. M. acknowledges the financial support by the People Programme (Marie
Curie Actions) of the European Union’s Seventh Framework Programme (FP7/ 2007-2013)
under REA.'
article_processing_charge: No
author:
- first_name: Bikashkali
full_name: Midya, Bikashkali
id: 456187FC-F248-11E8-B48F-1D18A9856A87
last_name: Midya
- first_name: Vladimir
full_name: Konotop, Vladimir
last_name: Konotop
citation:
ama: Midya B, Konotop V. Coherent-perfect-absorber and laser for bound states in
a continuum. Optics Letters. 2018;43(3):607-610. doi:10.1364/OL.43.000607
apa: Midya, B., & Konotop, V. (2018). Coherent-perfect-absorber and laser for
bound states in a continuum. Optics Letters. Optica Publishing Group.
https://doi.org/10.1364/OL.43.000607
chicago: Midya, Bikashkali, and Vladimir Konotop. “Coherent-Perfect-Absorber and
Laser for Bound States in a Continuum.” Optics Letters. Optica Publishing
Group, 2018. https://doi.org/10.1364/OL.43.000607.
ieee: B. Midya and V. Konotop, “Coherent-perfect-absorber and laser for bound states
in a continuum,” Optics Letters, vol. 43, no. 3. Optica Publishing Group,
pp. 607–610, 2018.
ista: Midya B, Konotop V. 2018. Coherent-perfect-absorber and laser for bound states
in a continuum. Optics Letters. 43(3), 607–610.
mla: Midya, Bikashkali, and Vladimir Konotop. “Coherent-Perfect-Absorber and Laser
for Bound States in a Continuum.” Optics Letters, vol. 43, no. 3, Optica
Publishing Group, 2018, pp. 607–10, doi:10.1364/OL.43.000607.
short: B. Midya, V. Konotop, Optics Letters 43 (2018) 607–610.
date_created: 2018-12-11T11:46:27Z
date_published: 2018-02-01T00:00:00Z
date_updated: 2023-10-17T12:15:06Z
day: '01'
department:
- _id: MiLe
doi: 10.1364/OL.43.000607
ec_funded: 1
external_id:
arxiv:
- '1711.01986'
isi:
- '000423776600066'
intvolume: ' 43'
isi: 1
issue: '3'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1711.01986
month: '02'
oa: 1
oa_version: Preprint
page: 607 - 610
project:
- _id: 25681D80-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '291734'
name: International IST Postdoc Fellowship Programme
publication: Optics Letters
publication_status: published
publisher: Optica Publishing Group
publist_id: '7388'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Coherent-perfect-absorber and laser for bound states in a continuum
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 43
year: '2018'
...
---
_id: '939'
abstract:
- lang: eng
text: We reveal the existence of continuous families of guided single-mode solitons
in planar waveguides with weakly nonlinear active core and absorbing boundaries.
Stable propagation of TE and TM-polarized solitons is accompanied by attenuation
of all other modes, i.e., the waveguide features properties of conservative and
dissipative systems. If the linear spectrum of the waveguide possesses exceptional
points, which occurs in the case of TM polarization, an originally focusing (defocusing)
material nonlinearity may become effectively defocusing (focusing). This occurs
due to the geometric phase of the carried eigenmode when the surface impedance
encircles the exceptional point. In its turn, the change of the effective nonlinearity
ensures the existence of dark (bright) solitons in spite of focusing (defocusing)
Kerr nonlinearity of the core. The existence of an exceptional point can also
result in anomalous enhancement of the effective nonlinearity. In terms of practical
applications, the nonlinearity of the reported waveguide can be manipulated by
controlling the properties of the absorbing cladding.
article_number: '033905'
article_processing_charge: No
author:
- first_name: Bikashkali
full_name: Midya, Bikashkali
id: 456187FC-F248-11E8-B48F-1D18A9856A87
last_name: Midya
- first_name: Vladimir
full_name: Konotop, Vladimir
last_name: Konotop
citation:
ama: 'Midya B, Konotop V. Waveguides with absorbing boundaries: Nonlinearity controlled
by an exceptional point and solitons. Physical Review Letters. 2017;119(3).
doi:10.1103/PhysRevLett.119.033905'
apa: 'Midya, B., & Konotop, V. (2017). Waveguides with absorbing boundaries:
Nonlinearity controlled by an exceptional point and solitons. Physical Review
Letters. American Physical Society. https://doi.org/10.1103/PhysRevLett.119.033905'
chicago: 'Midya, Bikashkali, and Vladimir Konotop. “Waveguides with Absorbing Boundaries:
Nonlinearity Controlled by an Exceptional Point and Solitons.” Physical Review
Letters. American Physical Society, 2017. https://doi.org/10.1103/PhysRevLett.119.033905.'
ieee: 'B. Midya and V. Konotop, “Waveguides with absorbing boundaries: Nonlinearity
controlled by an exceptional point and solitons,” Physical Review Letters,
vol. 119, no. 3. American Physical Society, 2017.'
ista: 'Midya B, Konotop V. 2017. Waveguides with absorbing boundaries: Nonlinearity
controlled by an exceptional point and solitons. Physical Review Letters. 119(3),
033905.'
mla: 'Midya, Bikashkali, and Vladimir Konotop. “Waveguides with Absorbing Boundaries:
Nonlinearity Controlled by an Exceptional Point and Solitons.” Physical Review
Letters, vol. 119, no. 3, 033905, American Physical Society, 2017, doi:10.1103/PhysRevLett.119.033905.'
short: B. Midya, V. Konotop, Physical Review Letters 119 (2017).
date_created: 2018-12-11T11:49:18Z
date_published: 2017-07-18T00:00:00Z
date_updated: 2023-09-26T15:39:46Z
day: '18'
department:
- _id: MiLe
doi: 10.1103/PhysRevLett.119.033905
ec_funded: 1
external_id:
isi:
- '000405718200012'
intvolume: ' 119'
isi: 1
issue: '3'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: 'https://arxiv.org/abs/1706.04085 '
month: '07'
oa: 1
oa_version: Submitted Version
project:
- _id: 25681D80-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '291734'
name: International IST Postdoc Fellowship Programme
publication: Physical Review Letters
publication_identifier:
issn:
- '00319007'
publication_status: published
publisher: American Physical Society
publist_id: '6481'
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Waveguides with absorbing boundaries: Nonlinearity controlled by an exceptional
point and solitons'
type: journal_article
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 119
year: '2017'
...
---
_id: '1286'
abstract:
- lang: eng
text: We use recently developed angulon theory [R. Schmidt and M. Lemeshko, Phys.
Rev. Lett. 114, 203001 (2015)PRLTAO0031-900710.1103/PhysRevLett.114.203001] to
study the rotational spectrum of a cyanide molecular anion immersed into Bose-Einstein
condensates of rubidium and strontium. Based on ab initio potential energy surfaces,
we provide a detailed study of the rotational Lamb shift and many-body-induced
fine structure which arise due to dressing of molecular rotation by a field of
phonon excitations. We demonstrate that the magnitude of these effects is large
enough in order to be observed in modern experiments on cold molecular ions. Furthermore,
we introduce a novel method to construct pseudopotentials starting from the ab
initio potential energy surfaces, which provides a means to obtain effective coupling
constants for low-energy polaron models.
acknowledgement: The work was supported by the NSF through a grant for the Institute
for Theoretical Atomic, Molecular, and Optical Physics at Harvard University and
the Smithsonian Astrophysical Observatory. B.M. acknowledges financial support received
from the People Programme (Marie Curie Actions) of the European Union's Seventh
Framework Programme (FP7/2007-2013) under REA grant agreement No. 291734. M.T. acknowledges
support from the EU Marie Curie COFUND action (ICFOnest), the EU Grants ERC AdG
OSYRIS, FP7 SIQS and EQuaM, FETPROACT QUIC, the Spanish Ministry Grants FOQUS (FIS2013-46768-P)
and Severo Ochoa (SEV-2015-0522), Generalitat de Catalunya (SGR 874), Fundacio Cellex,
the National Science Centre (2015/19/D/ST4/02173), and the PL-Grid Infrastructure.
article_number: '041601'
author:
- first_name: Bikashkali
full_name: Midya, Bikashkali
id: 456187FC-F248-11E8-B48F-1D18A9856A87
last_name: Midya
- first_name: Michał
full_name: Tomza, Michał
last_name: Tomza
- first_name: Richard
full_name: Schmidt, Richard
last_name: Schmidt
- first_name: Mikhail
full_name: Lemeshko, Mikhail
id: 37CB05FA-F248-11E8-B48F-1D18A9856A87
last_name: Lemeshko
orcid: 0000-0002-6990-7802
citation:
ama: Midya B, Tomza M, Schmidt R, Lemeshko M. Rotation of cold molecular ions inside
a Bose-Einstein condensate. Physical Review A - Atomic, Molecular, and Optical
Physics. 2016;94(4). doi:10.1103/PhysRevA.94.041601
apa: Midya, B., Tomza, M., Schmidt, R., & Lemeshko, M. (2016). Rotation of cold
molecular ions inside a Bose-Einstein condensate. Physical Review A - Atomic,
Molecular, and Optical Physics. American Physical Society. https://doi.org/10.1103/PhysRevA.94.041601
chicago: Midya, Bikashkali, Michał Tomza, Richard Schmidt, and Mikhail Lemeshko.
“Rotation of Cold Molecular Ions inside a Bose-Einstein Condensate.” Physical
Review A - Atomic, Molecular, and Optical Physics. American Physical Society,
2016. https://doi.org/10.1103/PhysRevA.94.041601.
ieee: B. Midya, M. Tomza, R. Schmidt, and M. Lemeshko, “Rotation of cold molecular
ions inside a Bose-Einstein condensate,” Physical Review A - Atomic, Molecular,
and Optical Physics, vol. 94, no. 4. American Physical Society, 2016.
ista: Midya B, Tomza M, Schmidt R, Lemeshko M. 2016. Rotation of cold molecular
ions inside a Bose-Einstein condensate. Physical Review A - Atomic, Molecular,
and Optical Physics. 94(4), 041601.
mla: Midya, Bikashkali, et al. “Rotation of Cold Molecular Ions inside a Bose-Einstein
Condensate.” Physical Review A - Atomic, Molecular, and Optical Physics,
vol. 94, no. 4, 041601, American Physical Society, 2016, doi:10.1103/PhysRevA.94.041601.
short: B. Midya, M. Tomza, R. Schmidt, M. Lemeshko, Physical Review A - Atomic,
Molecular, and Optical Physics 94 (2016).
date_created: 2018-12-11T11:51:09Z
date_published: 2016-10-13T00:00:00Z
date_updated: 2021-01-12T06:49:37Z
day: '13'
department:
- _id: MiLe
doi: 10.1103/PhysRevA.94.041601
ec_funded: 1
intvolume: ' 94'
issue: '4'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1607.06092
month: '10'
oa: 1
oa_version: Preprint
project:
- _id: 25681D80-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '291734'
name: International IST Postdoc Fellowship Programme
publication: Physical Review A - Atomic, Molecular, and Optical Physics
publication_status: published
publisher: American Physical Society
publist_id: '6030'
quality_controlled: '1'
scopus_import: 1
status: public
title: Rotation of cold molecular ions inside a Bose-Einstein condensate
type: journal_article
user_id: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87
volume: 94
year: '2016'
...
---
_id: '1287'
abstract:
- lang: eng
text: A planar waveguide with an impedance boundary, composed of nonperfect metallic
plates, and with passive or active dielectric filling, is considered. We show
the possibility of selective mode guiding and amplification when a homogeneous
pump is added to the dielectric and analyze differences in TE and TM mode propagation.
Such a non-conservative system is also shown to feature exceptional points for
specific and experimentally tunable parameters, which are described for a particular
case of transparent dielectric.
acknowledgement: The research of B.M. is supported by the People Programme (Marie
Curie Actions) of the European Union’s Seventh Framework Programme (FP7/2007-2013)
under REA grant No. [291734].
article_processing_charge: No
author:
- first_name: Bikashkali
full_name: Midya, Bikashkali
id: 456187FC-F248-11E8-B48F-1D18A9856A87
last_name: Midya
- first_name: Vladimir
full_name: Konotop, Vladimir
last_name: Konotop
citation:
ama: Midya B, Konotop V. Modes and exceptional points in waveguides with impedance
boundary conditions. Optics Letters. 2016;41(20):4621-4624. doi:10.1364/OL.41.004621
apa: Midya, B., & Konotop, V. (2016). Modes and exceptional points in waveguides
with impedance boundary conditions. Optics Letters. Optica Publishing Group.
https://doi.org/10.1364/OL.41.004621
chicago: Midya, Bikashkali, and Vladimir Konotop. “Modes and Exceptional Points
in Waveguides with Impedance Boundary Conditions.” Optics Letters. Optica
Publishing Group, 2016. https://doi.org/10.1364/OL.41.004621.
ieee: B. Midya and V. Konotop, “Modes and exceptional points in waveguides with
impedance boundary conditions,” Optics Letters, vol. 41, no. 20. Optica
Publishing Group, pp. 4621–4624, 2016.
ista: Midya B, Konotop V. 2016. Modes and exceptional points in waveguides with
impedance boundary conditions. Optics Letters. 41(20), 4621–4624.
mla: Midya, Bikashkali, and Vladimir Konotop. “Modes and Exceptional Points in Waveguides
with Impedance Boundary Conditions.” Optics Letters, vol. 41, no. 20, Optica
Publishing Group, 2016, pp. 4621–24, doi:10.1364/OL.41.004621.
short: B. Midya, V. Konotop, Optics Letters 41 (2016) 4621–4624.
date_created: 2018-12-11T11:51:09Z
date_published: 2016-10-15T00:00:00Z
date_updated: 2023-10-17T12:16:24Z
day: '15'
department:
- _id: MiLe
doi: 10.1364/OL.41.004621
ec_funded: 1
intvolume: ' 41'
issue: '20'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1609.02863
month: '10'
oa: 1
oa_version: Preprint
page: 4621 - 4624
project:
- _id: 25681D80-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '291734'
name: International IST Postdoc Fellowship Programme
publication: Optics Letters
publication_status: published
publisher: Optica Publishing Group
publist_id: '6029'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Modes and exceptional points in waveguides with impedance boundary conditions
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 41
year: '2016'
...