Výsledky vyhledávání - "Luecke, Bernd"

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

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

Publikováno v: Quantum 7, 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: http://arxiv.org/abs/2104.05663

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Entanglement between two spatially separated atomic modes

Autor: Lange, Karsten, Peise, Jan, Lücke, Bernd, Kruse, Ilka, Vitagliano, Giuseppe, Apellaniz, Iagoba, Kleinmann, Matthias, Toth, Geza, Klempt, Carsten

Publikováno v: Science 360, 416 (2018)

Modern quantum technologies in the fields of quantum computing, quantum simulation and quantum metrology require the creation and control of large ensembles of entangled particles. In ultracold ensembles of neutral atoms, highly entangled states cont

Externí odkaz: http://arxiv.org/abs/1708.02480

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Entanglement and extreme spin squeezing of unpolarized states

Autor: Vitagliano, Giuseppe, Apellaniz, Iagoba, Kleinmann, Matthias, Lücke, Bernd, Klempt, Carsten, Toth, Geza

Publikováno v: New J. Phys. 19, 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 by

Externí odkaz: http://arxiv.org/abs/1605.07202

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Detecting metrologically useful entanglement in the vicinity of Dicke states

Autor: Apellaniz, Iagoba, Lücke, Bernd, Peise, Jan, Klempt, Carsten, Toth, Geza

Publikováno v: New J. Phys. 17, 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: http://arxiv.org/abs/1412.3426

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Detecting multiparticle entanglement of Dicke states

Autor: Lücke, Bernd, Peise, Jan, Vitagliano, Giuseppe, Arlt, Jan, Santos, Luis, Toth, Geza, Klempt, Carsten

Publikováno v: Phys. Rev. Lett. 112, 155304 (2014)

Recent experiments demonstrate the production of many thousands of neutral atoms entangled in their spin degrees of freedom. We present a criterion for estimating the amount of entanglement based on a measurement of the global spin. It outperforms pr

Externí odkaz: http://arxiv.org/abs/1403.4542

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Twin matter waves for interferometry beyond the classical limit

Autor: Lücke, Bernd, Scherer, Manuel, Kruse, Jens, Pezzé, Luca, Deuretzbacher, Frank, Hyllus, Phillip, Topic, Oliver, Peise, Jan, Ertmer, Wolfgang, Arlt, Jan, Santos, Luis, Smerzi, Augusto, Klempt, Carsten

Publikováno v: Science 334, 773-776 (2011)

Interferometers with atomic ensembles constitute an integral part of modern precision metrology. However, these interferometers are fundamentally restricted by the shot noise limit, which can only be overcome by creating quantum entanglement among th

Externí odkaz: http://arxiv.org/abs/1204.4102

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