WavePacket (C++/Python) / Tickets / #139 Filter that applies a NIP after a propagation time step

Ulf Lorenz - 2019-03-21

Milestone: Backlog --> 0.2.5
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Ulf Lorenz - 2019-04-28

Milestone: 0.2.5 --> Backlog
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Description has changed:

Diff:

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@@ -1,6 +1,8 @@
 #### Motivation ####

 Some propagators do not sit well with absorbing boundary conditions. In particular, the Chebychev propagator requires a real-valued operator spectrum. For such cases (and maybe also for comparison with the Matlab version), a filter would be good that can apply such a negative imaginary potential after a main propagation time step.
+
+Note: closely related to [#101]

 #### Acceptance criteria####

Tickets: #101

Ulf Lorenz - 2020-01-01

Milestone: Backlog --> 0.4 goal
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Ulf Lorenz - 2020-01-01

Milestone: 0.4 goal --> 0.3.1
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Ulf Lorenz - 2020-02-10

status: open --> assigned

assigned_to: Ulf Lorenz
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Description has changed:

Diff:

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+**Problem: Applying a NIP after a propagation timestep requires exponentiation of an operator. That in turn requires some convenience functionality to make this less awkward; partly done, but without respecting this issue.**
+
 #### Motivation ####

 Some propagators do not sit well with absorbing boundary conditions. In particular, the Chebychev propagator requires a real-valued operator spectrum. For such cases (and maybe also for comparison with the Matlab version), a filter would be good that can apply such a negative imaginary potential after a main propagation time step.
@@ -8,3 +10,4 @@

 * A filter that applies the negative imaginary potential after a main time step.
 * A demo that demonstrates the feature. Maybe something that is too slow with ODE propagators?
+    * Suggestion: Conical/LinearInter this has at least some absorption

status: assigned --> open
assigned_to: Ulf Lorenz --> nobody
Milestone: 0.3.1 --> 0.4 goal

Filter that applies a NIP after a propagation time step

Time-dependent simulation of open and closed quantum systems

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#139 Filter that applies a NIP after a propagation time step

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