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  1. 24 Feb, 2020 1 commit
    • Nguyen, Thien Minh's avatar
      Add XACC Optimal Control Optimizer service · 6ecae529
      Nguyen, Thien Minh authored 
      

Currently, this `optimal` control service only supports GOAT.

Inputs:

-	Target unitary

-	Hamiltonian: in the form [H0, (Hi, fi)….]

Expr-tk to compile those symbolic expressions and to evaluate their values or derivatives during propagation.

Add a simple unit test to verify the basic usage.

Signed-off-by: Nguyen, Thien Minh's avatarThien Nguyen <nguyentm@ornl.gov>
      6ecae529
  3. 21 Feb, 2020 2 commits
  5. 20 Feb, 2020 1 commit
    • Nguyen, Thien Minh's avatar
      Working example of GOAT · 181bdc0e
      Nguyen, Thien Minh authored 
      

This is still *Work-in-progress* at the moment.
In particular, I'm using a simple L-BFGS lib for testing purposes.
Interestingly enough, both NL-OPT and ML-PACK failed to optimize (using l-bfgs)
this example. They were simply stuck. All impls followed the same trajectory but only
the simple one was able to escape the local minima and hence converge.

Want to get this checked-in as the baseline first while diving into why ML-PACK and NL-OPT
cannot work out-of-box for this case. Perhaps there are some options that we can tweak.

Tested by: the added unit test for simple X gate optimization

Signed-off-by: Nguyen, Thien Minh's avatarThien Nguyen <nguyentm@ornl.gov>
      181bdc0e
  7. 18 Feb, 2020 1 commit
    • Nguyen, Thien Minh's avatar
      Some initial work on GOAT pulse optimization · dc004586
      Nguyen, Thien Minh authored 
      

After reading the paper, it seems like the best place to implement this is in XACC, not QuaC since this has nothing to do with state evolution, which is what QuaC does. Perhaps, we just need to verify the final *optimized* pulse on QuaC.

This commit contains high-level (abstract) components to implement GOAT. Due to its analytical nature, I think it's a good idea to provide an abstract way to specify the algorithm, e.g. we could implement problem-specific hooks if needed.

Signed-off-by: Nguyen, Thien Minh's avatarThien Nguyen <nguyentm@ornl.gov>
      dc004586
  9. 11 Feb, 2020 1 commit
  11. 10 Feb, 2020 2 commits
    • Mccaskey, Alex's avatar
      updates to benchmark docs · f45aa703
      Mccaskey, Alex authored 
      

Signed-off-by: Mccaskey, Alex's avatarAlex McCaskey <mccaskeyaj@ornl.gov>
      f45aa703
    • Nguyen, Thien Minh's avatar
      Fix some compatibility issues · 2735dea5
      Nguyen, Thien Minh authored 
      

Testing QPT with QuaC, I was puzzled by the fact that `getPointerLike<Accelerator>` and `getPointerLike<CompositeInstruction>` were failing although I *did* send on those two parameters and the heterogenous map *does* contain those params, just that the templated functions are mismatched (possibly between the QuaC side and XACC side)

My theory was that because these are all implicit instantiations, somehow, they can become mismatched (the order in which the compiler sees those instantiations), especially with external linkage (like QuaC).

Anyway, by explicitly instantiating those (Accelerator and Composite), the issue is fixed.

Also, fix a bug in QPT where the imaginary chi vector is always uninitialized (all zeros)

Lastly, add an option to QPT to disable circuit optimization. When the circuit contains pulse instructions, the circuit optimizer doesn’t work correctly (looks like it may skip the pulse instruction and merge gates)

Tested by: running XACC tests and QuaC QPT tests.

Signed-off-by: Nguyen, Thien Minh's avatarThien Nguyen <nguyentm@ornl.gov>
      2735dea5
  13. 07 Feb, 2020 2 commits
  15. 06 Feb, 2020 4 commits
  17. 05 Feb, 2020 5 commits
  19. 03 Feb, 2020 1 commit
  21. 28 Jan, 2020 2 commits
  23. 27 Jan, 2020 2 commits
  25. 24 Jan, 2020 8 commits
  27. 23 Jan, 2020 8 commits