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UID:6a0f8adf25c33
DTSTART:20240605T100000Z
SEQUENCE:0
TRANSP:OPAQUE
DTEND:20240605T110000Z
LOCATION:Elements Room
SUMMARY:ICFO | BLAZEJ JAWOROWSKI 
CLASS:PUBLIC
DESCRIPTION:The exploration of atomic fractional quantum Hall (FQH) states 
 is now within reach in optical-lattice experiments. While ground-state sig
 natures have been observed in a system realizing the Hofstadter-Bose-Hubba
 rd model in a box [L&eacute\;onard&nbsp\;et al.\,&nbsp\;Nature (London)&nb
 sp\;619\, 495 (2023)]\, how to access hallmark low-energy collective modes
  remains a central open question in this context. We introduce a spectrosc
 opic scheme based on two interfering Laguerre-Gaussian beams\, which trans
 fer a controlled angular momentum and energy to the system. The edge and b
 ulk responses to the probe are detected through local density measurements
  by tracking the transfer of atoms between the bulk and the edge of the FQ
 H droplet. This detection scheme is shown to simultaneously reveal two spe
 cific signatures of FQH states: their chiral edge branch and their bulk ma
 gnetoroton mode. We numerically benchmark our method by considering few bo
 sons in the&nbsp\;????=1/2&nbsp\;Laughlin ground state of the Hofstadter-B
 ose-Hubbard model\, and demonstrate that these signatures are already dete
 ctable in realistic systems of two bosons\, provided that the box potentia
 l is sufficiently large compared to the droplet. Our paper paves the way f
 or the detection of fractional statistics in cold atoms through edge signa
 tures.
DTSTAMP:20260521T224447Z
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