Details
| Original language | English |
|---|---|
| Article number | 032339 |
| Journal | Physical Review A |
| Volume | 97 |
| Issue number | 3 |
| Early online date | 27 Mar 2018 |
| Publication status | Published - Mar 2018 |
Abstract
Recent experiments demonstrated the generation of entanglement by quasiadiabatically driving through quantum phase transitions of a ferromagnetic spin-1 Bose-Einstein condensate in the presence of a tunable quadratic Zeeman shift. We analyze, in terms of the Fisher information, the interferometric value of the entanglement accessible by this approach. In addition to the Twin-Fock phase studied experimentally, we unveil a second regime, in the broken axisymmetry phase, which provides Heisenberg scaling of the quantum Fisher information and can be reached on shorter time scales. We identify optimal unitary transformations and an experimentally feasible optimal measurement prescription that maximize the interferometric sensitivity. We further ascertain that the Fisher information is robust with respect to nonadiabaticity and measurement noise. Finally, we show that the quasiadiabatic entanglement preparation schemes admit higher sensitivities than dynamical methods based on fast quenches.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
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In: Physical Review A, Vol. 97, No. 3, 032339, 03.2018.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Interferometric sensitivity and entanglement by scanning through quantum phase transitions in spinor Bose-Einstein condensates
AU - Feldmann, P.
AU - Gessner, M.
AU - Gabbrielli, M.
AU - Klempt, C.
AU - Santos, L.
AU - Pezzè, L.
AU - Smerzi, A.
N1 - Funding information: We acknowledge support by the SFB 1227 “DQ-mat” Projects No. A02 and No. B01, of the German Research Foundation (DFG). M. G. thanks the Alexander von Humboldt foundation for support.
PY - 2018/3
Y1 - 2018/3
N2 - Recent experiments demonstrated the generation of entanglement by quasiadiabatically driving through quantum phase transitions of a ferromagnetic spin-1 Bose-Einstein condensate in the presence of a tunable quadratic Zeeman shift. We analyze, in terms of the Fisher information, the interferometric value of the entanglement accessible by this approach. In addition to the Twin-Fock phase studied experimentally, we unveil a second regime, in the broken axisymmetry phase, which provides Heisenberg scaling of the quantum Fisher information and can be reached on shorter time scales. We identify optimal unitary transformations and an experimentally feasible optimal measurement prescription that maximize the interferometric sensitivity. We further ascertain that the Fisher information is robust with respect to nonadiabaticity and measurement noise. Finally, we show that the quasiadiabatic entanglement preparation schemes admit higher sensitivities than dynamical methods based on fast quenches.
AB - Recent experiments demonstrated the generation of entanglement by quasiadiabatically driving through quantum phase transitions of a ferromagnetic spin-1 Bose-Einstein condensate in the presence of a tunable quadratic Zeeman shift. We analyze, in terms of the Fisher information, the interferometric value of the entanglement accessible by this approach. In addition to the Twin-Fock phase studied experimentally, we unveil a second regime, in the broken axisymmetry phase, which provides Heisenberg scaling of the quantum Fisher information and can be reached on shorter time scales. We identify optimal unitary transformations and an experimentally feasible optimal measurement prescription that maximize the interferometric sensitivity. We further ascertain that the Fisher information is robust with respect to nonadiabaticity and measurement noise. Finally, we show that the quasiadiabatic entanglement preparation schemes admit higher sensitivities than dynamical methods based on fast quenches.
UR - http://www.scopus.com/inward/record.url?scp=85044442646&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.97.032339
DO - 10.1103/PhysRevA.97.032339
M3 - Article
AN - SCOPUS:85044442646
VL - 97
JO - Physical Review A
JF - Physical Review A
SN - 2469-9926
IS - 3
M1 - 032339
ER -