Implement density matrix simulation via full tensor network contraction #88
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added 20 commits
January 21, 2021 09:33
Signed-off-by: Thien Nguyen <[email protected]>
Signed-off-by: Thien Nguyen <[email protected]>
Also, expose ExecutionInfo to return density matrix for testing. Signed-off-by: Thien Nguyen <[email protected]>
Signed-off-by: Thien Nguyen <[email protected]>
First, test w/ no noise, just looking at the final density matrix Signed-off-by: Thien Nguyen <[email protected]>
Signed-off-by: Thien Nguyen <[email protected]>
Signed-off-by: Thien Nguyen <[email protected]>
Signed-off-by: Thien Nguyen <[email protected]>
Signed-off-by: Thien Nguyen <[email protected]>
Signed-off-by: Thien Nguyen <[email protected]>
Legs of output tensor are re-shuffled after Kraus tensor connection. Affecting multi-qubit cases. Waiting for a new ExaTN API to handle this use case... Signed-off-by: Thien Nguyen <[email protected]>
Appending Z tensors at measure locations then closing the bra and ket legs to compute the trace. Signed-off-by: Thien Nguyen <[email protected]>
Signed-off-by: Thien Nguyen <[email protected]>
Signed-off-by: Thien Nguyen <[email protected]>
Fixing the output leg ordering issue. Signed-off-by: Thien Nguyen <[email protected]>
…ring Signed-off-by: Thien Nguyen <[email protected]>
(i.e. support the tnqvm:visitor format) Signed-off-by: Thien Nguyen <[email protected]>
and update the one found Signed-off-by: Thien Nguyen <[email protected]>
added an integration test with VQE. Signed-off-by: Thien Nguyen <[email protected]>
Signed-off-by: Thien Nguyen <[email protected]>
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Related to #84 and #87
Implemented a noisy simulation (
exatn-dm) via full tensor network contraction. Gates and Kraus tensors are appended --> perform a full contraction. Support retrieval of the density matrix up to 10 qubits. Exp-val calc. (no limit on the number of qubits) is performed by tracing the tensor network (closing the bra and ket legs).Also, added
backendkey as a way to specify the visitor name.