Multipartite entanglement, such as witnessed through the quantum Fisher information (QFI), is a crucial resource for quantum technologies, but its experimental certification is highly challenging. Here, we propose an experimentally friendly protocol to measure the QFI. It relies on recording the short-time dynamics of simple observables after a quench from a thermal state, works for spins, bosons, and fermions, and can be implemented in standard cold-atom experiments and other platforms with temporal control over the system Hamiltonian. To showcase the protocol, we simulate it for the one-dimensional Fermi-Hubbard model. Further, we establish a family of bounds connecting the QFI to multipartite mode entanglement for fermionic systems, which enable the detection of multipartite entanglement at sizable temperatures. Our work paves a way to experimentally accessing entanglement for quantum enhanced metrology

From entanglement certification with quench dynamics to multipartite entanglement of interacting fermions / Costa de Almeida, Ricardo; Hauke, Philipp. - In: PHYSICAL REVIEW RESEARCH. - ISSN 2643-1564. - ELETTRONICO. - 3:3(2021), pp. L032051-1-L032051-6. [10.1103/PhysRevResearch.3.L032051]

From entanglement certification with quench dynamics to multipartite entanglement of interacting fermions

Costa de Almeida, Ricardo
Primo
;
Hauke, Philipp
Ultimo
2021-01-01

Abstract

Multipartite entanglement, such as witnessed through the quantum Fisher information (QFI), is a crucial resource for quantum technologies, but its experimental certification is highly challenging. Here, we propose an experimentally friendly protocol to measure the QFI. It relies on recording the short-time dynamics of simple observables after a quench from a thermal state, works for spins, bosons, and fermions, and can be implemented in standard cold-atom experiments and other platforms with temporal control over the system Hamiltonian. To showcase the protocol, we simulate it for the one-dimensional Fermi-Hubbard model. Further, we establish a family of bounds connecting the QFI to multipartite mode entanglement for fermionic systems, which enable the detection of multipartite entanglement at sizable temperatures. Our work paves a way to experimentally accessing entanglement for quantum enhanced metrology
2021
3
Costa de Almeida, Ricardo; Hauke, Philipp
From entanglement certification with quench dynamics to multipartite entanglement of interacting fermions / Costa de Almeida, Ricardo; Hauke, Philipp. - In: PHYSICAL REVIEW RESEARCH. - ISSN 2643-1564. - ELETTRONICO. - 3:3(2021), pp. L032051-1-L032051-6. [10.1103/PhysRevResearch.3.L032051]
File in questo prodotto:
File Dimensione Formato  
PhysRevResearch.3.L032051.pdf

accesso aperto

Tipologia: Versione editoriale (Publisher’s layout)
Licenza: Creative commons
Dimensione 731.1 kB
Formato Adobe PDF
731.1 kB Adobe PDF Visualizza/Apri
2005.03049+(1).pdf

Solo gestori archivio

Tipologia: Pre-print non referato (Non-refereed preprint)
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 570.5 kB
Formato Adobe PDF
570.5 kB Adobe PDF   Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/315612
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 13
  • ???jsp.display-item.citation.isi??? 18
social impact