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# Questions tagged [simulation]

For questions about simulating either quantum computers or simulating things on quantum computers.

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### Get output probability of a qubit given measurement result of other qubits on Stim

I am doing experiments about Clifford circuits using Stim: a fast stabilizer circuit simulator. For a n-qubit Clifford circuit, I want to get the output probability of q_n given the measurement result ...
1 vote
33 views

### How to simulate circuit on a simulator with more than 129 qubits?

Currently I am using the Aer simulator and I get the error: CircuitTooWideForTarget: 'Number of qubits (129) in circuit-166 is greater than maximum (29) in the coupling_map'? Is there any simulator in ...
34 views

1 vote
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### What are some resources to get started in quantum computing for nuclear and high-energy physics?

One of the big hopes for quantum computing is to simulate quantum many-body systems with quantum systems and thereby solve many outstanding problems that are otherwise intractable in nuclear and high-...
1 vote
18 views

### How to implement frequencies (drive,measuring) and temperature in a qiskit Noise Model?

Im trying to build a qiskit Noise Model but the NoiseModel() class does not admit temperature, frequencies or measuring time. I thought about using the pulse ...
34 views

### How do these two notions of "multiplicative approximation" relate?

While reading a few quantum supremacy results, I have come across two ostensibly different notions of "multiplicative approximation". I am wondering how they relate. In the following, $p$ ...
25 views

### Extended Stabilizer Simulator:Get Statistics of the quantum circuit

I am trying to simulate a Clifford+T gate quantum circuit using extended stabilizer simulator. But as i see it only returns the measurement output. The measurement output(counts) depends on the shots ...
14 views

### How to plot a histogram of a pulse-level quantum circuit simulation in QuTiP?

The qutip_qip package allows for pulse-level quantum circuit simulation, compared to for instance the gate-level quantum circuit simulation found in Qiskit (to understand the difference, scroll to the ...
• 101
45 views

### How can I increase number of qubits by increasing RAM/GPU?

I am using Qiskit, where if I go beyond 32 qubits, the output does not get counted. The code is not supported by the stabilizer back-end. I want to use up to 100+ qubits for my task. I got RAM 42 GB ...
38 views

### Remove edges from PyMatching matching graph / Copy Matching object

I am simulating a surface code where the edges in the syndrome graph change slightly from shot to shot based on erasures that occur in the circuit (i.e. I have a syndrome graph corresponding to the ...
• 13
1 vote
47 views

### How to implement fault tolerant cat state construction with qiskit?

I want to build a fault-tolerant error correction gadget in qiskit. As a part of that, I want to construct cat states (for the syndrome measurements) in a fault-tolerant way. One way to do this, is to ...
• 858
1 vote
60 views

### Matrix product state simulator gives incorrect result for more than 64 qubits

I am running the example to create the EPR circuit on a matrix product state simualtor from the qiskit documentation. The program does not work correctly if the number of qubits is more than 65. Here ...
• 199
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### Modeling a chemical reaction when there is a catalyst

I'd like to construct potential energy surfaces (PES) for chemical reactions with and without the presence of a catalyst. Something like this The closest paper that is https://arxiv.org/pdf/2007....
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### Can quantum computers help to solve questions of general relativity theory?

My question is rather straightforward: Can quantum computers be used to solve problem within general relativity theory? To put more context. As GR is based on solution of rather complicated systems of ...
• 14.7k
1 vote
66 views

### Simulating Large Quantum Systems with Single T-Gate in Qiskit: Memory Error Beyond Certain Qubit Threshold

I'm currently conducting experiments on unitary t-designs, utilizing random Clifford and T gates within the Qiskit framework. My goal is to simulate quantum circuits that involve the application of a ...
1 vote
75 views

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