7 Is there an efficient circuit implementing the unitary $U|x\rangle|0\rangle=|x\rangle\Big(\sqrt{1 - x/2^n}\,|0\rangle+\sqrt{x/2^n}|1\rangle\Big)?$ 2021-01-11T14:18:43.473

5 How instantaneous is state preparation in a quantum register, if all possible superpositions are to be initialized equally? 2020-12-20T10:54:56.817

2 How to prepare a random 1-qubit superposition for data encoding 2021-02-26T18:29:22.523

1 How can I find the fidelity of preparation? 2020-02-27T01:39:14.640

0 Produce a quantum state with its density matrix an identity matrix up to an constant 2020-11-16T09:07:27.117

-3 Have you ever seen the preparation of the state $a^{*}|0\rangle+b^*|1\rangle$ and $a|0\rangle+b|1\rangle$ from one initial state? 2020-12-11T09:21:55.900