# Tag Info

### Applications of Quantum Computing to Economics

There is a lot of proposition how to use quantum computers in finance, see this question. Your are right that you can simulate Hamiltonians on a quantum computer easier than on classical computer. ...
• 11.8k

### Qiskit Portfolio Optimization Application

I changed the stock parameter to a list of strings and added the line stockmarket = StockMarket.NASDAQ as such: ...
• 81
Accepted

### Travelling salesman problem on quantum computer

Based on comment by DaftWullie and my experience with the algortihm, it seems that a title of the article is misleading. The authors claim that algorithm they proposed is efficient. However, this is ...
• 11.8k

### What is the risk factor on IBM's portfolio optimization notebook?

The objective of the portfolio optimization problem is to trade off expected return ($\mu^T x$) with the risk taken ($x^T \Sigma$x). This could be achieved by introducing a constraint on the risk, e....
Accepted

### Is it possible to demonstrate a quadratic speed-up of a quantum algorithm on a classical computer?

I have not read the full details of the paper, but have attempted to skim over the most relevant bits to the question (i.e. I could easily have missed something). As I read the paper, they are doing ...
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Accepted

### Quantum computing in finance - list of articles

Here are two more papers that may be of interest: A Quantum Algorithm For Linear PDEs Arising In Finance Dynamic Portfolio Optimization with Real Datasets Using Quantum Processors and Quantum-...
Accepted

### Cannot replicate results in article on pricing financial derivatives on IBM Q

One thing that I noticed. If cu3 gate from $q[2]$ to $q[0]$ is some $U$, then the cu3 from $q[2]$ to $q[0]$ should be $U^2$ in the phase estimation algorithm, but the comparisons of operators with the ...
• 4,058
Accepted

### Quantum pricing of financial derivatives (call option) in Qiskit Aqua

There are tutorials for a lot of the Qiskit Aqua functions kept in the tutorials repository, and I think this talks about the finance problem you are interested in. All of these tutorials are also ...
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### Rotations to encode $f(x)$ into ancilla qubit for quantum Monte Carlo

From "Supervised Learning with Quantum Computers" by M. Schuld & F. Petruccione (p. 157):
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### What is Ising Hamiltonian ? What its role in Portfolio Diversification?

Hamiltonian is the basic building block for VQE algorithm. Basically, we try to minimize the expectation of the Hamiltonian to find the lowest eigenvalue of the Hamiltonian matrix which is apparently ...

### Traveling salesman problem in Qiskit: cannot find a solution on simulator

May be this should be added as a comment, but I do not have the privilege to add comments. Any way, I ran your code as it is and there was no errors: ...
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1 vote

### Qiskit sample - Portfolio optimization

Well you can fix it also. Like if you want to take 3 assets. THEN TAKE BUDGET=3. [BUDGET IS THE NO OF ASSETS U WANT TO SELECT OUT OF TOTAL ASSETS(num_assets)] Now your number of assets can be 5, 10, ...
1 vote

### How can I load a probability distribution using a quantum circuit in Qiskit?

Several quantum circuit representations for common distributions are given in uncertainty models. For generic probability distributions, you can train a quantum circuit representation using quantum ...
1 vote
Accepted

### Error using FixedIncomeExpectedValue sample

The quick answer to your problem is to install Qiskit Aqua directly from GitHub instead of via pip. On the lastest master version, this bug is fixed. You can do this using ...
• 2,298
1 vote

### What is Ising Hamiltonian ? What its role in Portfolio Diversification?

The Ising model is a formulation of your problem. Variables are variables $s_i$ that can take +1/-1 values.  \text{E}_{ising}(s) = \sum_{i=1}^N h_i s_i + \sum_{i=1}^N \sum_{j=i+1}^...
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1 vote

### Rotations to encode $f(x)$ into ancilla qubit for quantum Monte Carlo

Please have a look at article Transformation of quantum states using uniformly controlled rotations, chapters 1 and 2. These provides you with construction of general rotation gate controlled by $n$ ...
• 11.8k
1 vote

### Quantum computing in finance - list of articles

There are many Qiskit notebooks on quatum computers application in different areas, including finance, in IBM Q web interface. For application in finance, click on icon Qiskit Notebooks, then folder ...
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