Questions tagged [cirq]
A python framework for creating, editing, and invoking Noisy Intermediate Scale Quantum (NISQ) circuits. It is a Python library for writing, manipulating, and optimizing quantum circuits and running them against quantum computers and simulators.
14
questions
2
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1answer
153 views
Building a state with parallel execution
I'm trying to implement the main algorithm described in the Quantum Recommendation Systems paper. In order to do this, I have to create a quantum state $|x\rangle$ corresponding to a real vector ...
6
votes
1answer
462 views
Why is this implementation of the order finding algorithm not working?
I asked a question about this earlier, but I am still coming across problems in my algorithm implementation.
I am trying to implement the order finding algorithm on Cirq finding the minimal positive $...
1
vote
1answer
375 views
VQE Cirq example
Is my understanding correct that in this example the Hamiltonian measurement is not performed through measuring individual Pauli operators because all its terms are mutually commuting? So, for each ...
1
vote
1answer
48 views
Bit Flip, Seperable state and Several Question about Cirq
1)I want to use noise model for my state and bit_flip is not defined on cirq.
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4
votes
1answer
596 views
How to set a starting state in cirq?
I'm learning how to use the cirq library. Every time I set up a circuit the starting state of the qubits is $|0000..0\rangle$. Is there any way to make the starting state different? I'm thinking of ...
4
votes
3answers
3k views
Overview of Cirq, qiskit, q#, ibmq(circuit board), other [closed]
What is the difference between these frameworks or languages? What are the pros and cons of each of these? Do you know any similar framework/platform/language that gives some more advantages?
4
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3answers
821 views
How do I create my own unitary matrices that I can apply to a circuit in Cirq?
I am trying to simulate Deutsch's algorithm, and I need to apply the oracle function matrix to my circuit.
4
votes
1answer
232 views
How to add noise to existing gates in Cirq?
I would like to add noise to existing gates in Cirq, i.e. to define something like
NewGate = cirq.Gate(qubit)
followed by
...
3
votes
1answer
75 views
Multiplying quantum circuits in cirq using * and computing “expectation values”
I am reading cirq guide about Simulation and there is an example in "Expectation values" paragraph that I don't understand.
Everything boils down to the following snippet:
...
2
votes
0answers
94 views
Would this quantum algorithm implementation work?
I am trying to implement the order finding algorithm on Cirq finding the minimal positive $r$ for coprime $x$ and $N$ satisfying the equation $x^r \ = \ 1$(mod$ \ N$). In my case, I have set $x \ = \ ...
1
vote
1answer
64 views
Expectation value of an arbitrary observable. My own definition and `cirq` limitations
In my previous question I was struggling with the definition of expectation value of an observable for a circuit. Here is what I have derived after some support (I simplify the definition to 2-qubit ...
0
votes
1answer
45 views
Best way to compute $\langle a|B|a \rangle$ in Cirq, where a is a state obtained running circuit A. And B is a different Quantum Circuit
I am implementing RQAOA in Cirq.
After running regular QAOA to find an optimal state a (This I have done successfully).
I need to calculate $\langle a|Z_iZ_j|a\...
0
votes
1answer
117 views
Producing $|ghz\rangle\langle ghz|$ State in Cirq
I could manage to produce 3 qubit ghz state in Cirq. But I don't know how I can produce $|GHZ\rangle\langle GHZ|$ in Cirq
Here is my code for 3 qubit ghz state
Can you help me please for improving my ...
0
votes
1answer
24 views
Multiple Bipartite Entangled State in Cirq
I am trying to create this state:
rho = = q . rho_{1,2} + r . rho_{2,3} + s . rho{1,3} + (1-q-r-s) . rho_separable
And I wrote this code:
...
