fix doc

Author: nkanazawa1989

qiskit_experiments/library/hamiltonian/heat_zx.py

@@ -31,10 +31,6 @@ class ZXHeat(BatchHeatHelper):
         ZX-type generator, a typical Hamiltonian implemented
         by a cross resonance drive, which is a foundation of the CNOT gate.
 
-        The preparation circuit locks target qubit state along X-axis,
-        in which the state is insensitive to the controlled X rotation
-        imposed by the drive with the ZX-type generator.
-
         The echo circuit refocuses ZX rotation to identity (II) then applies
         a pi-pulse along the interrogated error axis. X error and Y error are
         amplified outward the X-Y plane to draw a ping-pong pattern with
@@ -85,7 +81,7 @@ class ZXHeat(BatchHeatHelper):
         ZX(angle) evolution otherwise selective amplification doesn't work properly.
 
     # section: see_also
-        HeatElement
+        qiskit_experiments.library.hamiltonian.HeatElement
 
     # section: analysis_ref
         :py:class:`HeatAnalysis`
@@ -165,10 +161,10 @@ class ZX90HeatXError(ZXHeat):
     """HEAT experiment for X error amplification for ZX(pi/2) Hamiltonian.
 
     # section: see_also
-        ZXHeat
+        qiskit_experiments.library.hamiltonian.ZXHeat
     """
 
-    def __init__(self, qubits: [int, int], backend: Optional[Backend] = None):
+    def __init__(self, qubits: Tuple[int, int], backend: Optional[Backend] = None):
         """Create new experiment.
 
         qubits: Index of control and target qubit, respectively.
@@ -186,10 +182,10 @@ class ZX90HeatYError(ZXHeat):
     """HEAT experiment for Y error amplification for ZX(pi/2) Hamiltonian.
 
     # section: see_also
-        ZXHeat
+        qiskit_experiments.library.hamiltonian.ZXHeat
     """
 
-    def __init__(self, qubits: [int, int], backend: Optional[Backend] = None):
+    def __init__(self, qubits: Tuple[int, int], backend: Optional[Backend] = None):
         """Create new experiment.
 
         qubits: Index of control and target qubit, respectively.
@@ -207,10 +203,10 @@ class ZX90HeatZError(ZXHeat):
     """HEAT experiment for Z error amplification for ZX(pi/2) Hamiltonian.
 
     # section: see_also
-        ZXHeat
+        qiskit_experiments.library.hamiltonian.ZXHeat
     """
 
-    def __init__(self, qubits: [int, int], backend: Optional[Backend] = None):
+    def __init__(self, qubits: Tuple[int, int], backend: Optional[Backend] = None):
         """Create new experiment.
 
         qubits: Index of control and target qubit, respectively.