fix doc typos

docs/source/tutorial/custom-hamiltonians.ipynb

@@ -35,7 +35,7 @@
         "\n",
         "## The Hubbard Model\n",
         "\n",
-        "In the following example, we implement a custom Hamiltonian for the Hubbard model. In the standard implementation, the on-site term was represented as ``cdCD``. Here we instead introduce a single letter ``N`` for the ``cdCD`` term. For each letter in ``cdCDN`` (representing elementary operators), we define its matrix representation in the local basis in ``site_ops``. The quantum number and number of states in each quantum number at each site (which defines the local Hilbert space) is set in ``site_basis``.\n",
+        "In the following example, we implement a custom Hamiltonian for the Hubbard model. In the standard implementation, the on-site term was represented as ``cdCD``. Here we instead introduce a single letter ``N`` for the ``cdCD`` term. For each letter in ``cdCDN`` (representing elementary operators), we define its matrix representation in the local basis in ``site_ops``. The quantum number and number of states in each quantum number at each site (which defines the local Hilbert space) are set in ``site_basis``.\n",
         "\n"
       ]
     },
@@ -497,7 +497,7 @@
         "  + \\frac{U}{2} \\sum_i n_i (n_i - 1) - \\mu \\sum_i n_i\n",
         "$$\n",
         "\n",
-        "In the following script, we consider a 1D chain including $L= 10$ sites with open boundary condition, $t = 1, U = 0.1$ and $\\mu = 0$. The total number of boson is set to 10, and the maximal number of boson is 5."
+        "In the following script, we consider a 1D chain including $L= 10$ sites with open boundary condition, $t = 1, U = 0.1$ and $\\mu = 0$. The total number of boson in the many-body state is set to 10, and the maximal number of boson per site is 5."
       ]
     },
     {