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Quantum Computing

Questions tagged [cirq]

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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.

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I have a composite quantum system with density matrixrho represented as a NumPy array of shape $(D,D)$, where $D = \prod_i d_i$ is the product of the dimensions of ...
Ceasar's user avatar
0votes
1answer
105views

I know that Qiskit uses the little-endian convention for qubit ordering and statevector indexing, while Pennylane uses the big-endian convention. Which convention is used by Cirq?
Radu M.'s user avatar
0votes
0answers
40views

The PauliStringPhasorGate gate in Cirq takes as input a Pauli string, which is exponentiated. I do not understand why two parameters can be given: exponent_neg and exponent_pos?To make my question ...
Radu M.'s user avatar
2votes
1answer
252views

I’m new to quantum computing and eager to contribute to open-source projects like Qiskit or Cirq. Could you recommend:Beginner-friendly resources (tutorials, books, or courses) to build foundational ...
Yemane's user avatar
2votes
1answer
196views

I am attempting to work in bothstim andcirq and was testing moving back and forth between the two and got an error for a ...
3votes
1answer
186views

I am a beginner in the quantum computing field and have recently taken Qiskit 101, where I first created my quantum circuit.What I was focusing on was understanding the change in state at each gate. ...
2votes
0answers
154views

The problem of encountering negative eigenvalues in the density matrix during Quantum State Tomography (QST) is well-explained in this Quantum Computing Stack Exchange post.However, I am seeking ...
0votes
0answers
69views

I attempted to create a custom measurement class which, in my case, allows us to go from the z basis to x basis using a hadamard gate transformation, and then we measure wrt that new basis. However, ...
1vote
1answer
198views

I am working on a project where I need to calculate 3x+1 for numbers 0 to infinity. I have an 8GB RAM laptop and I am using Cirq. For small numbers, I was able to perform the multiplication using the ...
0votes
0answers
95views

While doing quantum tomography in cirq, I ended up getting a density matrix which is not positive semi-definite. Why is this so? Here's the code I used:...
Ceasar's user avatar
-1votes
2answers
158views

I have a 30 qubit system and I need to do quantum tomography on a subsystem of 2 of its qubit. How can I do this in Cirq?
Ceasar's user avatar
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0answers
82views

Suppose I have a 30 qbit system, due to computational complexity, I can't find the density matrix of the system. But is it possible to find the partial trace of the a sub-system of 2 qubits out of 30 ...
Ceasar's user avatar
3votes
2answers
538views

$\newcommand{\ket}[1]{|{#1}\rangle}$I have a Qiskit quantum circuit for multiplication $M$, that I want tocompose onto another qiskit quantum circuit for inner ...
Aditya Morolia's user avatar
0votes
1answer
339views

Anyone have any idea how I can implement a depolarizing noise channel for qutrits using cirq? Say using the kraus operators within a class inheriting from cirq.Gate or so?
QuantumSon100's user avatar
2votes
1answer
113views

Cirq compilation process.I cannot find the documentation that describes the internal structure of the library Cirq by Google.There is much information related to high level functions, but none ...
user29482's user avatar

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