Zobrazeno 1 - 10
of 41
pro vyhledávání: '"Carsten Klempt"'
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
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
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
Autor:
Cebrail Pür, Mareike Hetzel, Martin Quensen, Andreas Hüper, Jiao Geng, Jens Kruse, Wolfgang Ertmer, Carsten Klempt
High data acquisition rates and low-noise detection of ultracold neutral atoms present important challenges for the state tomography and interferometric application of entangled quantum states in Bose-Einstein condensates. In this article, we present
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e2eb2a3d21d950a9bc930fb93b189845
http://arxiv.org/abs/2301.08172
http://arxiv.org/abs/2301.08172
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
https://doi.org/10.1117/12.2617229
Publikováno v:
Physical Review Letters
Physical Review Letters, American Physical Society, 2021, 126 (23), ⟨10.1103/PhysRevLett.126.230602⟩
Physical Review Letters, American Physical Society, 2021, 126 (23), ⟨10.1103/PhysRevLett.126.230602⟩
International audience; Excited-state quantum phase transitions extend the notion of quantum phase transitions beyond the ground state. They are characterized by closing energy gaps amid the spectrum. Identifying order parameters for excited-state qu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::31a2f4c45808134abdd8762fc512b9f3
https://doi.org/10.1103/physrevlett.126.230602
https://doi.org/10.1103/physrevlett.126.230602
Publikováno v:
Optical and Quantum Sensing and Precision Metrology.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5805afc0269b5940bbc3f5c782d928dc
https://doi.org/10.1117/12.2588445
https://doi.org/10.1117/12.2588445
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
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
Autor:
A. Idel, Jan Peise, Sina Loriani, Karsten Lange, Christian Schubert, Dennis Schlippert, P. Feldmann, Carsten Klempt, Matthias Gersemann, Dmytro Bondarenko, Ernst M. Rasel, Naceur Gaaloul, Luis Santos, Sven Abend, Fabian Anders, B. Meyer-Hoppe
Compared to light interferometers, the flux in cold-atom interferometers is low and the associated shot noise large. Sensitivities beyond these limitations require the preparation of entangled atoms in different momentum modes. Here, we demonstrate a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c08a844aa8f66784c7be6343925e791d
http://arxiv.org/abs/2010.15796
http://arxiv.org/abs/2010.15796
Autor:
Christian Lisdat, Carsten Klempt
Publikováno v:
Nature. 588:397-398
Atomic clocks known as optical clocks are more accurate and stable than current timekeepers. Two quantum-engineering approaches could improve the performance of optical clocks even further and extend their applications. Advances in developing a new g
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::138942a6aba73080fa96f4b8a1105d4f
https://doi.org/10.1038/d41586-020-03510-y
https://doi.org/10.1038/d41586-020-03510-y