Journal article icon

Journal article

Quasiparticle energy in a strongly interacting homogeneous Bose-Einstein condensate

Abstract:

Using two-photon Bragg spectroscopy, we study the energy of particlelike excitations in a strongly interacting homogeneous Bose-Einstein condensate, and observe dramatic deviations from Bogoliubov theory. In particular, at large scattering length a the shift of the excitation resonance from the free-particle energy changes sign from positive to negative. For an excitation with wave number q, this sign change occurs at a≈4/(πq), in agreement with the Feynman energy relation and the static stru...

Expand abstract
Publication status:
Published
Peer review status:
Peer reviewed

Actions


Access Document


Authors


More by this author
Role:
Author
ORCID:
0000-0003-3877-8478
More from this funder
Name:
Horizon 2020
Grant:
MSCA-IF-2015 704832
More from this funder
Name:
Engineering and Physical Sciences Research Council
Grant:
1642095
More from this funder
Name:
Air Force Office of Scientific Research
Publisher:
American Physical Society
Journal:
Physical Review Letters More from this journal
Volume:
118
Issue:
21
Pages:
210401
Publication date:
2017-05-23
Acceptance date:
2017-04-25
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
Pmid:
28598671
Language:
English
Keywords:
Pubs id:
pubs:700128
UUID:
uuid:f9cd31cf-481e-433e-b96e-154eceba11dc
Local pid:
pubs:700128
Source identifiers:
700128
Deposit date:
2018-06-19

Terms of use


Views and Downloads






If you are the owner of this record, you can report an update to it here: Report update to this record

TO TOP