Eliminating intermediate measurements in space-bounded Quantum computation
Eliminating intermediate measurements in space-bounded Quantum computation
复制标题
消除空间有限量子计算中的中间测量
DOI:
10.1145/3406325.3451051
复制
发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Remscrim, Zachary
中科院分区:
文献类型:
--
作者:
Fefferman, Bill;Remscrim, Zachary
A foundational result in the theory of quantum computation, known as the "principle of safe storage," shows that it is always possible to take a quantum circuit and produce an equivalent circuit that makes all measurements at the end of the computation. While this procedure is time efficient, meaning that it does not introduce a large overhead in the number of gates, it uses extra ancillary qubits, and so is not generally space efficient. It is quite natural to ask whether it is possible to eliminate intermediate measurements without increasing the number of ancillary qubits. We give an affirmative answer to this question by exhibiting a procedure to eliminate all intermediate measurements that is simultaneously space efficient and time efficient. In particular, this shows that the definition of a space-bounded quantum complexity class is robust to allowing or forbidding intermediate measurements. A key component of our approach, which may be of independent interest, involves showing that the well-conditioned versions of many standard linear-algebraic problems may be solved by a quantum computer in less space than seems possible by a classical computer.
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影响因子:
0.5
作者:
Eric Allender;V. Arvind;M. Mahajan
通讯作者:
M. Mahajan
DOI:
10.1090/conm/536/10552
发表时间:
2006-02
期刊:
arXiv: Quantum Physics
影响因子:
--
作者:
S. Bravyi
通讯作者:
S. Bravyi
影响因子:
1.4
作者:
Dean Doron;Amir Sarid;A. Ta
通讯作者:
A. Ta
DOI:
10.4230/lipics.itcs.2021.39
发表时间:
2020-03
期刊:
--
影响因子:
--
作者:
Zachary Remscrim
通讯作者:
Zachary Remscrim
DOI:
10.1109/ccc.1997.612299
发表时间:
1997
期刊:
Proceedings of Computational Complexity. Twelfth Annual IEEE Conference
影响因子:
--
作者:
Klaus;P. McKenzie;Alain Tapp
通讯作者:
Alain Tapp