| Issue |
EPL
Volume 140, Number 6, December 2022
|
|
|---|---|---|
| Article Number | 68001 | |
| Number of page(s) | 6 | |
| Section | Quantum information | |
| DOI | https://doi.org/10.1209/0295-5075/acab7e | |
| Published online | 28 December 2022 | |
Experimental construction of a symmetric three-qubit entangled state and its utility in testing the violation of a Bell inequality on an NMR quantum simulator
1 Department of Physical Sciences, Indian Institute of Science Education & Research Mohali Sector 81 SAS Nagar, Manauli PO 140306 Punjab, India
2 Vice Chancellor, Punjabi University Patiala - 147002, Punjab, India
(a) E-mail: kavita@iisermohali.ac.in (corresponding author)
Received: 30 June 2022
Accepted: 14 December 2022
We designed a quantum circuit to prepare a permutation-symmetric maximally entangled three-qubit state called the 
state and experimentally created it on an NMR quantum processor. The presence of entanglement in the state was certified by computing two different entanglement measures, namely negativity and concurrence. We used the state in conjunction with a set of maximally incompatible local measurements, to demonstrate the maximal violation of inequality number 26 in Sliwa's classification scheme, which is a tight Bell inequality for the (3, 2, 2) scenario, i.e., the three-party, two-measurement-settings and two-measurement-outcomes scenario.
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