Please Compute Concurrence Whats wrong

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SUMMARY

The discussion centers on the discrepancies in computing concurrence from a given rho matrix using numerical methods versus analytical methods outlined in Eberly's paper. The rho matrix provided is rho=[0.001 0 0 0.125;0 0.499 -0.374 0;0 -0.374 0.499 0;0.125 0 0 0.001];. Users are directed to specific MATLAB tools for numerical computation available at this site and this site. The discussion emphasizes the need for a deeper understanding of the analytical approach as per Equation 26 in Eberly's 2006 paper published in Optics Communications.

PREREQUISITES
  • Understanding of quantum mechanics and quantum states
  • Familiarity with the concept of concurrence in quantum information theory
  • Proficiency in MATLAB for numerical computations
  • Knowledge of Eberly's work on quantum optics, specifically Equation 26 from the 2006 paper
NEXT STEPS
  • Study the implementation of concurrence calculations in MATLAB using the provided tools
  • Review Eberly's 2006 paper on concurrence for a deeper analytical understanding
  • Explore additional resources on quantum state matrices and their properties
  • Investigate common pitfalls in numerical versus analytical computations in quantum mechanics
USEFUL FOR

Quantum physicists, researchers in quantum information science, and MATLAB users interested in computing quantum state properties and understanding the nuances of concurrence calculations.

coffekreizy
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Please Compute Concurrence...Whats wrong!

I have this rho matrix:

rho=[0.001 0 0 0.125;0 0.499 -0.374 0;0 -0.374 0.499 0;0.125 0 0 0.001];


Why the concurrence is different if you compute numerically (you can download programs for compute the concurrence in this sites:
http://optics.szfki.kfki.hu/~toth/qubit4matlab.html
http://www.dr-qubit.org/matlab.php

And if you use the Ec. 26 of Eberly paper/ Optics comm 264 (2006) 393-397
 
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I'm afraid you'll have to put a little more effort in your post if you expect people to help you.
 

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