# Retrieve bipartite reduced density matrix

**URL:** https://itensor.discourse.group/t/retrieve-bipartite-reduced-density-matrix/940
**Category:** ITensor Julia Questions
**Tags:** entanglement, julia
**Created:** [June 14, 2023, 9:25pm UTC](https://itensor.discourse.group/t/retrieve-bipartite-reduced-density-matrix/940 "2023-06-14T21:25:51Z")
**Posts on this page:** 1
**Showing post:** 6

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### Author: ![miles](https://yyz2.discourse-cdn.com/free1/user_avatar/itensor.discourse.group/miles/32/6_2.png) [@miles](https://itensor.discourse.group/u/miles)
#### Post date: [February 19, 2024, 3:56am UTC](https://itensor.discourse.group/t/retrieve-bipartite-reduced-density-matrix/940/6 "2024-02-19T03:56:30Z")

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Hi Brian, Aditya, here are some notes that hopefully answer this question. Brian, sorry I never got back to you last summer when you asked the follow-up question.

 ![Screenshot 2024-02-18 at 10.55.32 PM](https://global.discourse-cdn.com/free1/uploads/itensor/original/1X/8a959dab45184bbc0e474b7f067d5556853918af.png)

 ![Screenshot 2024-02-18 at 10.56.14 PM](https://global.discourse-cdn.com/free1/uploads/itensor/original/1X/23f81950323a2a0006c427e4f148ed5ba6b14dd3.png)

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