Quantifying and controlling entanglement in the quantum magnet Cs2CoCl4
The lack of methods to experimentally detect and quantify entanglement in quantum matter impedes our ability to identify materials hosting highly entangled phases, such as quantum spin liquids. We thus investigate the feasibility of using inelastic neutron scattering (INS) to implement a model-indep...
| Main Authors: | , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
American Physical Society
2021
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| _version_ | 1797090875260534784 |
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| author | Laurell, P Scheie, A Mukherjee, C Koza, M Enderle, M Tylczynski, Z Okamoto, S Coldea, R Tennant, A Alvarez, G |
| author_facet | Laurell, P Scheie, A Mukherjee, C Koza, M Enderle, M Tylczynski, Z Okamoto, S Coldea, R Tennant, A Alvarez, G |
| author_sort | Laurell, P |
| collection | OXFORD |
| description | The lack of methods to experimentally detect and quantify entanglement in quantum matter impedes our ability to identify materials hosting highly entangled phases, such as quantum spin liquids. We thus investigate the
feasibility of using inelastic neutron scattering (INS) to implement a model-independent measurement protocol
for entanglement based on three entanglement witnesses: one-tangle, two-tangle, and quantum Fisher information (QFI). We perform high-resolution INS measurements on Cs2CoCl4, a close realization of the S = 1/2
transverse-field XXZ spin chain, where we can control entanglement using the magnetic field, and compare
with density-matrix renormalization group calculations for validation. The three witnesses allow us to infer
entanglement properties and make deductions about the quantum state in the material. We find QFI to be a
particularly robust experimental probe of entanglement, whereas the one- and two-tangles require more careful
analysis. Our results lay the foundation for a general entanglement detection protocol for quantum spin systems |
| first_indexed | 2024-03-07T03:24:59Z |
| format | Journal article |
| id | oxford-uuid:b8bd2146-bbc3-4989-b6f3-441159aecce2 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T03:24:59Z |
| publishDate | 2021 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | oxford-uuid:b8bd2146-bbc3-4989-b6f3-441159aecce22022-03-27T04:57:57ZQuantifying and controlling entanglement in the quantum magnet Cs2CoCl4Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:b8bd2146-bbc3-4989-b6f3-441159aecce2EnglishSymplectic ElementsAmerican Physical Society2021Laurell, PScheie, AMukherjee, CKoza, MEnderle, MTylczynski, ZOkamoto, SColdea, RTennant, AAlvarez, GThe lack of methods to experimentally detect and quantify entanglement in quantum matter impedes our ability to identify materials hosting highly entangled phases, such as quantum spin liquids. We thus investigate the feasibility of using inelastic neutron scattering (INS) to implement a model-independent measurement protocol for entanglement based on three entanglement witnesses: one-tangle, two-tangle, and quantum Fisher information (QFI). We perform high-resolution INS measurements on Cs2CoCl4, a close realization of the S = 1/2 transverse-field XXZ spin chain, where we can control entanglement using the magnetic field, and compare with density-matrix renormalization group calculations for validation. The three witnesses allow us to infer entanglement properties and make deductions about the quantum state in the material. We find QFI to be a particularly robust experimental probe of entanglement, whereas the one- and two-tangles require more careful analysis. Our results lay the foundation for a general entanglement detection protocol for quantum spin systems |
| spellingShingle | Laurell, P Scheie, A Mukherjee, C Koza, M Enderle, M Tylczynski, Z Okamoto, S Coldea, R Tennant, A Alvarez, G Quantifying and controlling entanglement in the quantum magnet Cs2CoCl4 |
| title | Quantifying and controlling entanglement in the quantum magnet Cs2CoCl4 |
| title_full | Quantifying and controlling entanglement in the quantum magnet Cs2CoCl4 |
| title_fullStr | Quantifying and controlling entanglement in the quantum magnet Cs2CoCl4 |
| title_full_unstemmed | Quantifying and controlling entanglement in the quantum magnet Cs2CoCl4 |
| title_short | Quantifying and controlling entanglement in the quantum magnet Cs2CoCl4 |
| title_sort | quantifying and controlling entanglement in the quantum magnet cs2cocl4 |
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