[Context] Halved parameter flag. #191
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Co-authored-by: Mingkuan Xu <[email protected]>
Co-authored-by: Mingkuan Xu <[email protected]>
Co-authored-by: Mingkuan Xu <[email protected]>
xumingkuan
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Dec 18, 2024
Co-authored-by: Mingkuan Xu <[email protected]>
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Summary
This pull request introduces a flag for each parameter, which identifies whether it is halved or not. A halved parameter is a symbolic parameter that can be used in gates which take parameters of the form$\theta / 2$ . Examples of such gates include
rx,ry, andrz.Details
This pull request makes two changes to Quartz. First, each gate now has an$\theta / 2$ . The parameter index is taken an argument, since gates such as
is_param_halved(i)method, which returns true if parameteriis of the formu3have both halved parameters and standard parameters.This new metadata is then used by the
Contextto determine if any halved parameter gates are in use. If such a gate is in use, then the context conservatively assumes that the parameter will appear in a halved parameter gate.This pull request should not change the behaviour of Quartz in any way.
Purpose
This pull request is a partial solution to issue #190. In particular, this pull request adds support for the halved_parameter flag. This is to ensure that the maintainers of Quartz are satisfied with the solution, before integrating it with the
QasmParser.