Number-phase uncertainty relations and bipartite entanglement detection in spin ensembles

Autor: Giuseppe Vitagliano, Matteo Fadel, Iagoba Apellaniz, Matthias Kleinmann, Bernd Lücke, Carsten Klempt, Géza Tóth

Publikováno v: Quantum, Vol 7, p 914 (2023)

We present a method to detect bipartite entanglement based on number-phase-like uncertainty relations in split spin ensembles. First, we derive an uncertainty relation that plays the role of a number-phase uncertainty for spin systems. It is importan

Externí odkaz: https://doaj.org/article/dc8defbec7894cac928f54dccc6229ab

Analyzing spin states of a Bose-Einstein condensate with number-resolved counting

Autor: Carsten Klempt, Mareike Hetzel, Lucca Pezzè, Cebrail Pür, Martin Quensen, Andreas Hüper, Jens Kruse, Augusto Smerzi

Publikováno v: Optical and Quantum Sensing and Precision Metrology II.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d8b74960ebe777e8075d1e6738528a5b
https://doi.org/10.1117/12.2617229

Entanglement and extreme spin squeezing of unpolarized states

Autor: Giuseppe Vitagliano, Iagoba Apellaniz, Matthias Kleinmann, Bernd Lücke, Carsten Klempt, Géza Tóth

Publikováno v: New Journal of Physics, Vol 19, Iss 1, p 013027 (2017)

We present criteria to detect the depth of entanglement in macroscopic ensembles of spin- j particles using the variance and second moments of the collective spin components. The class of states detected goes beyond traditional spin-squeezed states b

Externí odkaz: https://doaj.org/article/8087b95fb27c44e595efd77b2c17bc2f

Simulation of XXZ Spin Models using Sideband Transitions in Trapped Bosonic Gases

Autor: Anjun Chu, Carsten Klempt, Ana Maria Rey, Johannes Will, Jan J. Arlt

Publikováno v: Chu, A, Will, J, Arlt, J, Klempt, C & Rey, A M 2020, ' Simulation of XXZ Spin Models using Sideband Transitions in Trapped Bosonic Gases ', Physical Review Letters, vol. 125, no. 24, 240504 . https://doi.org/10.1103/PhysRevLett.125.240504

We theoretically propose and experimentally demonstrate the use of motional sidebands in a trapped ensemble of $^{87}$Rb atoms to engineer tunable long-range XXZ spin models. We benchmark our simulator by probing a ferromagnetic to paramagnetic dynam

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d01700d26836995c06ed62833ac5d32f
https://pure.au.dk/portal/da/publications/simulation-of-xxz-spin-models-using-sideband-transitions-in-trapped-bosonic-gases(9a29f26f-3899-468e-998e-87c4be170a7e).html

Detecting metrologically useful entanglement in the vicinity of Dicke states

Autor: Iagoba Apellaniz, Bernd Lücke, Jan Peise, Carsten Klempt, Géza Tóth

Publikováno v: New Journal of Physics, Vol 17, Iss 8, p 083027 (2015)

We present a method to verify the metrological usefulness of noisy Dicke states of a particle ensemble with only a few collective measurements, without the need for a direct measurement of the sensitivity. Our method determines the usefulness of the

Externí odkaz: https://doaj.org/article/f55b718c049948148042ce87fab57d84