Details
| Original language | English |
|---|---|
| Article number | 083027 |
| Journal | New Journal of Physics |
| Volume | 17 |
| Issue number | 8 |
| Publication status | Published - 13 Aug 2015 |
Abstract
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 state for the usual protocol for estimating the angle of rotation with Dicke states, which is based on the measurement of the second moment of a total spin component. It can also be used to detect entangled states that are useful for quantum metrology. We apply our method to recent experimental results.
Keywords
- Dicke states, quantum entanglement, quantum Fisher information, quantum metrology
ASJC Scopus subject areas
- Physics and Astronomy(all)
- General Physics and Astronomy
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In: New Journal of Physics, Vol. 17, No. 8, 083027, 13.08.2015.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Detecting metrologically useful entanglement in the vicinity of Dicke states
AU - Apellaniz, Iagoba
AU - Lücke, Bernd
AU - Peise, Jan
AU - Klempt, Carsten
AU - Tóth, Géza
PY - 2015/8/13
Y1 - 2015/8/13
N2 - 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 state for the usual protocol for estimating the angle of rotation with Dicke states, which is based on the measurement of the second moment of a total spin component. It can also be used to detect entangled states that are useful for quantum metrology. We apply our method to recent experimental results.
AB - 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 state for the usual protocol for estimating the angle of rotation with Dicke states, which is based on the measurement of the second moment of a total spin component. It can also be used to detect entangled states that are useful for quantum metrology. We apply our method to recent experimental results.
KW - Dicke states
KW - quantum entanglement
KW - quantum Fisher information
KW - quantum metrology
UR - http://www.scopus.com/inward/record.url?scp=84941591665&partnerID=8YFLogxK
U2 - 10.1088/1367-2630/17/8/083027
DO - 10.1088/1367-2630/17/8/083027
M3 - Article
AN - SCOPUS:84941591665
VL - 17
JO - New Journal of Physics
JF - New Journal of Physics
SN - 1367-2630
IS - 8
M1 - 083027
ER -