Optimal circular dichroism sensing with quantum light : multi-parameter estimation approach
The measurement of circular dichroism (CD) has widely been exploited to distinguish the different enantiomers of chiral structures. It has been applied to natural materials (e.g. molecules) as well as to artificial materials (e.g. nanophotonic structures). However, especially for chiral molecules...
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sg-ntu-dr.10356-1560652023-02-28T20:03:28Z Optimal circular dichroism sensing with quantum light : multi-parameter estimation approach Ioannou, Christina Nair, Ranjith Fernandez-Corbaton, Ivan Gu, Mile Rockstuhl, Carsten Lee, Changhyoup School of Physical and Mathematical Sciences Complexity Institute Science::Physics::Optics and light Quantum Sensing Quantum Optics The measurement of circular dichroism (CD) has widely been exploited to distinguish the different enantiomers of chiral structures. It has been applied to natural materials (e.g. molecules) as well as to artificial materials (e.g. nanophotonic structures). However, especially for chiral molecules the signal level is very low and increasing the signal-to-noise ratio is of paramount importance to either shorten the necessary measurement time or to lower the minimum detectable molecule concentration. As one solution to this problem, we propose here to use quantum states of light in CD sensing to reduce the noise below the shot noise limit that is encountered when using coherent states of light. Through a multi-parameter estimation approach, we identify the ultimate quantum limit to precision of CD sensing, allowing for general schemes including additional ancillary modes. We show that the ultimate quantum limit can be achieved by various optimal schemes. It includes not only Fock state input in direct sensing configuration but also twin-beam input in ancilla-assisted sensing configuration, for both of which photon number resolving detection needs to be performed as the optimal measurement setting. These optimal schemes offer a significant quantum enhancement even in the presence of additional system loss. The optimality of a practical scheme using a twin-beam state in direct sensing configuration is also investigated in details as a nearly optimal scheme for CD sensing when the actual CD signal is very small. Alternative schemes involving single-photon sources and detectors are also proposed. This work paves the way for further investigations of quantum metrological techniques in chirality sensing. Ministry of Education (MOE) National Research Foundation (NRF) Submitted/Accepted version This work was partially supported by the Deutsche Forschungsgemeinschaft (DFG; German Research Foundation) under Germany’s Excellence Strategy via the Excellence Cluster 3D Matter Made to Order (EXC-2082/1–390761711), the VIRTMAT project at KIT, the National Research Foundation Singapore (NRF- NRFF2016-02), NRF Singapore and L’Agence Nationale de la Recherche Joint Project (NRF2017- NRFANR004 Van-QuTe), Singapore Ministry of Education (RG162/19), FQXi (FQXi-RFP-IPW-1903), the Quantum Engineering Program QEP-SP3, and KIAS Individual Grant No. QP081101 via the Quantum Universe Center at Korea Institute for Advanced Study. 2022-04-04T05:38:38Z 2022-04-04T05:38:38Z 2021 Journal Article Ioannou, C., Nair, R., Fernandez-Corbaton, I., Gu, M., Rockstuhl, C. & Lee, C. (2021). Optimal circular dichroism sensing with quantum light : multi-parameter estimation approach. Physical Review A, 104(5), 052615-. https://dx.doi.org/10.1103/PhysRevA.104.052615 1050-2947 https://hdl.handle.net/10356/156065 10.1103/PhysRevA.104.052615 2-s2.0-85120003049 5 104 052615 en NRF- NRFF2016-02 NRF2017- NRFANR004 Van-QuTe RG162/19 Physical Review A © 2021 American Physical Society. All rights reserved. This paper was published in Physical Review A and is made available with permission of American Physical Society. application/pdf |
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Science::Physics::Optics and light Quantum Sensing Quantum Optics Ioannou, Christina Nair, Ranjith Fernandez-Corbaton, Ivan Gu, Mile Rockstuhl, Carsten Lee, Changhyoup Optimal circular dichroism sensing with quantum light : multi-parameter estimation approach |
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The measurement of circular dichroism (CD) has widely been exploited to
distinguish the different enantiomers of chiral structures. It has been applied
to natural materials (e.g. molecules) as well as to artificial materials (e.g.
nanophotonic structures). However, especially for chiral molecules the signal
level is very low and increasing the signal-to-noise ratio is of paramount
importance to either shorten the necessary measurement time or to lower the
minimum detectable molecule concentration. As one solution to this problem, we
propose here to use quantum states of light in CD sensing to reduce the noise
below the shot noise limit that is encountered when using coherent states of
light. Through a multi-parameter estimation approach, we identify the ultimate
quantum limit to precision of CD sensing, allowing for general schemes
including additional ancillary modes. We show that the ultimate quantum limit
can be achieved by various optimal schemes. It includes not only Fock state
input in direct sensing configuration but also twin-beam input in
ancilla-assisted sensing configuration, for both of which photon number
resolving detection needs to be performed as the optimal measurement setting.
These optimal schemes offer a significant quantum enhancement even in the
presence of additional system loss. The optimality of a practical scheme using
a twin-beam state in direct sensing configuration is also investigated in
details as a nearly optimal scheme for CD sensing when the actual CD signal is
very small. Alternative schemes involving single-photon sources and detectors
are also proposed. This work paves the way for further investigations of
quantum metrological techniques in chirality sensing. |
author2 |
School of Physical and Mathematical Sciences |
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School of Physical and Mathematical Sciences Ioannou, Christina Nair, Ranjith Fernandez-Corbaton, Ivan Gu, Mile Rockstuhl, Carsten Lee, Changhyoup |
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Article |
author |
Ioannou, Christina Nair, Ranjith Fernandez-Corbaton, Ivan Gu, Mile Rockstuhl, Carsten Lee, Changhyoup |
author_sort |
Ioannou, Christina |
title |
Optimal circular dichroism sensing with quantum light : multi-parameter estimation approach |
title_short |
Optimal circular dichroism sensing with quantum light : multi-parameter estimation approach |
title_full |
Optimal circular dichroism sensing with quantum light : multi-parameter estimation approach |
title_fullStr |
Optimal circular dichroism sensing with quantum light : multi-parameter estimation approach |
title_full_unstemmed |
Optimal circular dichroism sensing with quantum light : multi-parameter estimation approach |
title_sort |
optimal circular dichroism sensing with quantum light : multi-parameter estimation approach |
publishDate |
2022 |
url |
https://hdl.handle.net/10356/156065 |
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1759854384601104384 |