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Results for grover's algorithm
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3 votes
1 answer
562 views
Consequences of Grover's algorithm
I want to look more closely at the consequences of the Grovers algorithm. As is well known, the algorithm provides a quadratic improvement compared to classical search algorithms. … Specifically, I would be interested in the implications of Grover's algorithm on modern cryptography. So how is the influence of grover's algorithm on cryptography. …
11 votes
4 answers
3k views
Grover's algorithm in a nutshell
How can you use Grover's Algorithm to find the shortest path? … I still want to have a brief explanation of Grover's Algorithm (i.e. Grover's algorithm in a nutshell) but didn't get a sufficient answer yet. …
6 votes
1 answer
116 views
Grover's algorithm not under an oracle?
I've learned about Grover's algorithm's optimal procedure, but I just read this blurb from wikipedia: Grover's algorithm is optimal up to sub-constant factors. … That is, any algorithm that accesses the database only by using the operator $U_ω$ must apply $U_ω$ at least a $1 − o(1)$ fraction as many times as Grover's algorithm. …
2 votes
2 answers
565 views
Qubit demands of Grover's Algorithm
In other words, it seems that the qubit demands of Grover's algorithm should be $O(2^{n/2})$ to search $\{0,1\}^n$. … Doesn't this make Grover's algorithm substantially harder to implement than the classical analogue, which only uses $n$ bits? …
-2 votes
1 answer
120 views
Oracle in Grover's algorithm [duplicate]
In the Grover's algorithm, the solution is already in the Oracle in order to mark winning state(s). I just wonder if we already know the solution, why do we need to run a circuit ? …
2 votes
2 answers
267 views
Grover's algorithm to maximize QUBO functions
How can I use Grover's algorithm to do this? I've been told to encode this cost function which I'm not sure of. And to use quantum annealing to maximize the cost function. … Where does Grover's algorithm comes in this? Thanks in advance! …
2 votes
1 answer
205 views
Connectivity in Grover's algorithm on real quantum computers
Everytime I execute Grover's search algorithm on IBM real quantum computers I get a wrong answer (it doesn't find the correct winner state) unless I use only 2 qubits. … Do I need each qubit to be connected to all the other ones in the circuit for Grover's algorithm to work? Here is the Python code I am using. …
2 votes
0 answers
116 views
Length / transpilation issues with Grover's algorithm
I am doing a final project on grover's algorithm, and the premise would require an extremely large number of qubits. … The probabilties of the simulators themselves are upwards of 99%, but even after a two qubit Grover's algorithm, it shows as only 40ish %? …
1 vote
1 answer
317 views
Grover's algorithm for complex phases
Grover's algorithm traditionally inputs a phase oracle, $U_\omega$ such that $U_\omega | x \rangle = (-1)^{f(x)} | x \rangle$. The task is to find some $x$ such that $f(x) = 1$. … Of course, $N$ is the number of states, $4$, not the number of bits here, as Grover's algorithm is traditionally written as. …
17 votes
3 answers
5k views
Grover's algorithm: a real life example?
The input for Grover's algorithm is $n = \log_2(N=8) = 3$ qubits, where the 3 qubits encode the indices of the dataset. … There are implementations for Grover's algorithm with an oracle for $n=3$ searching for |111>, e.g. …
4 votes
0 answers
199 views
Grover's algorithm for game tree
Scott Aaronson gives the outline of an algorithm to evaluate whether there exists a satisfying assignment for a given game tree. … The idea is to use Grover's search recursively, for each level of the tree. He notes the following problem with this approach. …
16 votes
4 answers
2k views
Grover's Algorithm and its relation to complexity classes?
I am getting confused about Grover's algorithm and it's connection to complexity classes. … Furthermore the Grover's algorithm can be used as a subroutine. …
1 vote
1 answer
1k views
Solve sudoku using Grover's algorithm
The Qiskit tutorial shows the application of Grover's Algorithm to solve a 2x2 sudoku. However, I don't understand how why its diffuser works as intended. …
6 votes
1 answer
1k views
Second reflection in the Grover's algorithm
When interpreted geometrically, the second phase of the Grover's algorithm which corresponds to inversion about the mean is interpreted as reflection over the original state. …
7 votes
1 answer
725 views
Implementation of Grover's Algorithm (minimum spanning tree)
I am trying to solve a minimum spanning tree problem using Grover's Algorithm. … To accomplish this I would need to search a list for the minimum weight or edge for each point, for example: Given the following list: How would one use Grover's algorithm to search for the minimum …