1. Study of nonlocal correlations in macroscopic measurement scenario
Samir Kunkri
Mahadevananda Mahavidyalaya
Barrackpore, West Bengal

2. We will address this question in the context of the correlation.
Motivation
In our everyday experience all the physical phenomena satisfy the laws of classical physics.
But in the microscopic world follows the rules of quantum physics.
The description of quantum and classical physics both are conceptually and mathematically different.
when and how do the systems stop behaving quantum mechanically and begin behaving classically?
We will address this question in the context of the correlation.

3. Correlation

5. Bell-CHSH Inequality

6. Our work
When and how do the non-local correlations transforms to the local correlations? Any reasonable theory ( quantum or post-quantum) should recover classical physics In the Macroscopic level

7. Macroscopic Experiment

8. Quantum correlation & Macroscopic Measurement
Bancal et al. (Phys. Rev. A 78, (2008).) have studied the violation of Bell inequalities of entangled state considering a general multipair scenario.
The nonlocality of the quantum entangled state decreases in this multipair scenario with the increases of the number of independent entangled pair.
Thus classicality emerges at the macroscopic label.
Is it true for all the post-quantum correlation?

9. PR- correlation & Macroscopic Measurement

10. M = 2

11. Case-2

13. New CHSH-value

14. M-independent PR-correlation

15. Noisy correlation

16. Results

17. Merits of the results

18. THANK YOU