Add DeviceJacobianProducts jacobian product calculator
#4637
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Co-authored-by: David Wierichs <david.wierichs@xanadu.ai>
Co-authored-by: David Wierichs <david.wierichs@xanadu.ai>
Co-authored-by: David Wierichs <david.wierichs@xanadu.ai>
Co-authored-by: David Wierichs <david.wierichs@xanadu.ai>
Co-authored-by: David Wierichs <david.wierichs@xanadu.ai>
Co-authored-by: David Wierichs <david.wierichs@xanadu.ai>
Co-authored-by: David Wierichs <david.wierichs@xanadu.ai>
dwierichs
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Oct 12, 2023
Co-authored-by: David Wierichs <david.wierichs@xanadu.ai>
albi3ro
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Oct 19, 2023
This PR follows on from #4435 , and adds a child class that can handle device-provided derivatives. It has two private caches, `_results_cache` and `_jacs_cache`. This handles storing the jacobian between the forward pass and the backward pass. The caches will also store results and jacobians between successive calls to the same instance. The class can handle both device interfaces, `qml.Device` and `qml.devices.Device`. Name for the class is still up in the air. This class takes the full jacobian from the device and then performs the dot product. The class in #4637 takes the jacobian product itself from the device. --------- Co-authored-by: David Wierichs <david.wierichs@xanadu.ai> Co-authored-by: Mudit Pandey <mudit.pandey@xanadu.ai>
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mudit2812
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Oct 20, 2023
This PR follows on from #4435 , and adds a child class that can handle device-provided derivatives. It has two private caches, `_results_cache` and `_jacs_cache`. This handles storing the jacobian between the forward pass and the backward pass. The caches will also store results and jacobians between successive calls to the same instance. The class can handle both device interfaces, `qml.Device` and `qml.devices.Device`. Name for the class is still up in the air. This class takes the full jacobian from the device and then performs the dot product. The class in #4637 takes the jacobian product itself from the device. --------- Co-authored-by: David Wierichs <david.wierichs@xanadu.ai> Co-authored-by: Mudit Pandey <mudit.pandey@xanadu.ai>
albi3ro
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Nov 7, 2023
This PR follows on from #4527 and #4637 . Since we still need to make performance improvements to `DefaultQubit.compute_vjp`, I added an opt-in keyword argument `use_device_jacobian_product` to `qml.execute`. This allows us to easily compare between using the device jacobian product and not. Fixes #3217 --------- Co-authored-by: David Wierichs <david.wierichs@xanadu.ai> Co-authored-by: Tom Bromley <49409390+trbromley@users.noreply.github.com>
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This PR is a follow on to #4527 . [sc-44325]
It adds
DeviceJacobianProductsthat can bind device provided jvps and vjps to the execution pipeline.