update bib

Author: ytdHuang

docs/src/resources/bibliography.bib

@@ -1,3 +1,25 @@
+@book{Nielsen-Chuang2011,
+  Author = {Michael A. Nielsen and Isaac L. Chuang},
+  Title = {Quantum Computation and Quantum Information: 10th Anniversary Edition},
+  Publisher = {Cambridge University Press},
+  Year = {2011},
+  ISBN = {9781107002173},
+  URL = {https://www.amazon.com/Quantum-Computation-Information-10th-Anniversary/dp/1107002176?SubscriptionId=AKIAIOBINVZYXZQZ2U3A&tag=chimbori05-20&linkCode=xm2&camp=2025&creative=165953&creativeASIN=1107002176}
+}
+
+@article{Jozsa1994,
+  author = {Richard Jozsa},
+  title = {Fidelity for Mixed Quantum States},
+  journal = {Journal of Modern Optics},
+  volume = {41},
+  number = {12},
+  pages = {2315--2323},
+  year = {1994},
+  publisher = {Taylor \& Francis},
+  doi = {10.1080/09500349414552171},
+  URL = {https://doi.org/10.1080/09500349414552171},
+}
+
 @article{gravina2024adaptive,
   title = {{Adaptive variational low-rank dynamics for open quantum systems}},
   author = {Gravina, Luca and Savona, Vincenzo},

docs/src/users_guide/states_and_operators.md

@@ -20,7 +20,7 @@ and then create a lowering operator ``\hat{a}`` corresponding to `5` number stat
 a = destroy(5)
 ```
 
-Now lets apply the lowering operator `\hat{a}` to our vacuum state `vac`:
+Now lets apply the lowering operator ``\hat{a}`` to our vacuum state `vac`:
 
 ```@example states_and_operators
 a * vac
@@ -172,7 +172,7 @@ z = thermal_dm(5, 0.125)
 
 fidelity(x, y)
 ```
-Note that the definition of [`fidelity`](@ref) here is from **Nielsen & Chuang, "Quantum Computation and Quantum Information"**. It is the square root of the fidelity defined in **R. Jozsa, Journal of Modern Optics, 41:12, 2315 (1994)**. We also know that for two pure states, the trace distance (``T``) and the fidelity (``F``) are related by ``T = \sqrt{1-F^2}``:
+Note that the definition of [`fidelity`](@ref) here is from [Nielsen-Chuang2011](@cite). It is the square root of the fidelity defined in [Jozsa1994](@cite). We also know that for two pure states, the trace distance (``T``) and the fidelity (``F``) are related by ``T = \sqrt{1-F^2}``:
 
 ```@example states_and_operators
 tracedist(x, y) ≈ sqrt(1 - (fidelity(x, y))^2)