Related papers: Chen and Diao's quantum search algorithm is not ex…

This paper has been withdrawn due to an error in the proof of Theorem 5.3.

This paper has been withdrawn by the authors.

This paper has been withdrawn by the author and replaced by arXiv:0809.4751

This paper has been withdrawn.

Quite often in database search, we only need to extract portion of the information about the satisfying item. Recently Radhakrishnan & Grover [RG] considered this problem in the following form: the database of $N$ items was divided into $K$…

This paper has been withdrawn

This paper has been withdrawn because the result turns out to be trivial.

The paper has been withdrawn.

The paper was withdrawn by the author. It contained various errors.

This paper has been withdrawn by the authors due to crucial error on assumption in Eq. 2. We cannot assume v_R and v_L to be equal or even have the same sign.

Quantum computation, in particular Grover's algorithm, has aroused a great deal of interest since it allows for a quadratic speedup to be obtained in search procedures. Classical search procedures for an $N$ element database require at most…

This paper has been withdrawn by the author.

This paper has been withdrawn by the author due to a crucial problem in Lemma 3. This equation must be changed.

This paper has been withdrawn by the author.

This paper has been withdrawn as it has been superseded by postings arXiv:quant-ph/0702147 and arXiv:0712.2935

This paper has been withdrawn by the author due to a crucial sign error in equation 1

This paper has been withdrawn by the author

This paper has been withdrawn due to its publication

This paper has been withdrawn by the authors. We have discovered an error in the evaluation of the diagram, which invalidates our conclusion.

This paper has been withdrawn by the author due to a misunderstanding about 3QBF.