Add spin chain tutorial (PT-TEBD)

tempoCollaboration · Jan 26, 2022 · 9a4efd2 · 9a4efd2
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diff --git a/examples/00-spin-chain.py b/examples/00-spin-chain.py
@@ -25,12 +25,6 @@
 
 # -----------------------------------------------------------------------------
 
-sx = oqupy.operators.sigma("x")
-sy = oqupy.operators.sigma("y")
-sz = oqupy.operators.sigma("z")
-
-up_dm = oqupy.operators.spin_dm("z+")
-down_dm = oqupy.operators.spin_dm("z-")
 
 # --- Parameters --------------------------------------------------------------
 

diff --git a/oqupy/backends/pt_tebd_backend.py b/oqupy/backends/pt_tebd_backend.py
@@ -13,9 +13,13 @@
 # limitations under the License.
 """
 Module for Process Tensor Time Evolving Block Decimation (PT-TEBD) backend.
-
 The algorithms in this module are explained in the supplemental material
 of [Fux2022].
+
+**[Fux2022]**
+G. E. Fux, D. Kilda, B. W. Lovett, and J. Keeling, *Thermalization of a
+spin chain strongly coupled to its environment*, arXiv:2201.05529 (2022).
+
 """
 
 import concurrent

diff --git a/oqupy/pt_tebd.py b/oqupy/pt_tebd.py
@@ -13,8 +13,12 @@
 # limitations under the License.
 """
 Module for the process tensor approach to time evolving block decimation.
-
 This module is based on [Fux2022].
+
+**[Fux2022]**
+G. E. Fux, D. Kilda, B. W. Lovett, and J. Keeling, *Thermalization of a
+spin chain strongly coupled to its environment*, arXiv:2201.05529 (2022).
+
 """
 
 from typing import Dict, List, Optional, Text, Union

diff --git a/tutorials/tutorial_00_pt_tebd.ipynb b/tutorials/tutorial_00_pt_tebd.ipynb