Comments (4)
davidbkemp
commented on July 20, 2024
Currently there isn’t a way to remove qubits. However, I can see this could be useful. Will consider trying to support it.
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tobiasBora
commented on July 20, 2024
Nice, thanks a lot. I guess this could be seen as a tracing out operation, so implementing a partial trace operation would solve the problem I guess. Thanks!
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davidbkemp
commented on July 20, 2024
Sorry, it will take at least another week or so before I get back to this. Life has got rather busy.
I agree it could be seen as a "tracing out operation". I don't think it could be a general partial trace or we would have to support mixed states. It could work if you are only allowed to trace out the bits that have the same values in all states I guess, or we tie it to the measurement operation and only allow you to trace out the measured bits. It has been a few years since I looked at this though.
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tobiasBora
commented on July 20, 2024
Oh, no worries, there is nothing urgent, it was just a suggestion, take your time. It's already great to see that you are thinking to implement it!
Oh yeah you are right, I forgot that the library was dealing with pure states only. Then I guess it makes sense to bind it to a measurement operation (otherwise the function that checks if a qubit is composed only of zeros or ones could fail and it would not be "physical" as it allows you to test if a qubit is in superposition or not). And I guess it may also be more efficient to measure and remove at the same time rather than by doing two operations. Maybe adding an optional argument to the measurement operator would be a nice user interface?
Thanks a lot!
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Related Issues (20)
- Make jsqubits and jsqubitsmath be requirejs friendly
- Improve the objects returned by each() HOT 1
- Fix or remove usages of typeof and instanceof HOT 1
- How about refactor the project to ES6? HOT 1
- Examples don't run out of the box. HOT 5
- Document QState.each() HOT 1
- Publish new npm version HOT 3
- Decide what to do about bower support HOT 1
- dist/commonjs/index.js not found HOT 4
- Update Babel stuff HOT 1
- declaration for TypeScript HOT 8
- Provide easy to use js file (even better: url to include directly) HOT 2
- Document the maths functions
- Fix exceptions to follow a more standard pattern HOT 1
- Allow array of bits anywhere we currently allow a bit range
- Include a 'remainingQbits' field on measurement outcomes.
- Support Complex.getPhase() HOT 1
- QState.eql uses non existent field amplitudes HOT 1
- Make use of js Math constants like Math.SQRT1_2 HOT 1
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