QC101 Quantum Computing & Intro to Quantum Machine Learning (Udemy.com)
Math-Based Introduction to Quantum Computing, Cryptography & Quantum Machine Learning. Code with Python, Q#, & Qiskit
Created by: Kumaresan Ramanathan
Last updated December 2025
What you will learn
- Use quantum cryptography to communicate securely
- Develop, simulate, and debug quantum programs on IBM Qiskit and Microsoft Q#
- Run quantum programs on a real quantum computer through IBM Quantum Experience
- Use Dirac's notation and quantum physics models to analyze quantum circuits
- Train a Quantum Support Vector Machine (Quantum Machine Learning) on real-world data and use it to make predictions
- Learn Data science and how quantum computing can help in artificial intelligence / machine learning
- Learn why machine learning will be the killer-app for quantum computing
How it compares
Against the other 518 rated Udemy courses in Software Development on CourseDuck:
- Rating4.5 out of 5higher than 41% of them
- Reviews5,610#29 of 519 by number of reviews
- Length11.9 hourslonger than 74% of them
- Last updatedDecember 2025more recently than 53% of them
Course Description
Welcome to the bestselling quantum computing course on Udemy!
Quantum Computing is the next wave of the software industry. Quantum computers are exponentially faster than classical computers of today. Problems that were considered too difficult for computers to solve, such as simulation of protein folding in biological systems, and cracking RSA encryption, are now possible through quantum computers.
How fast are Quantum Computers? A 64-bit quantum computer can process 36 billion billion bytes of information in each step of computation. Compare that to the 8 bytes that your home computer can process in each step of computation!
Companies like Google, Intel, IBM, and Microsoft are investing billions in their quest to build quantum computers. If you master quantum computing now, you will be ready to profit from this technology revolution.
This course teaches quantum computing from the ground up. The only background you need is 12th grade level high-school Math and Physics.
IMPORTANT: You must enjoy Physics and Math to get the most out of this course. This course is primarily about analyzing the behavior of quantum circuits using Math and Quantum Physics. While everything you need to know beyond 12th grade high school science is explained here, you must be aware that Quantum Physics is an extremely difficult subject. You might frequently need to stop the video and replay the lesson to understand it.
QUANTUM MACHINE LEARNING
It appears that the killer-app for quantum computing will be machine learning and artificial intelligence.
Quantum machine learning algorithms provide a significant speed-up in training. This speed-up can result in more accurate predictions.
While understanding quantum algorithms requires mastery of complex math, using quantum machine learning is relatively simple. Qiskit encapsulates machine learning algorithms inside an API that mimics the popular Scikit-Learn machine-learning toolkit. So you can use quantum machine learning almost as easily as you would traditional ML!
Quantum machine learning can be applied in the back-end to train models, and those trained models can be used in consumer gadgets. This means that quantum machine learning might enhance your everyday life even if quantum computers remain expensive!
COURSE OUTLINE
We begin by learning about basic math. You might have forgotten the math you learned in high-school. I will review linear algebra, probability, Boolean algebra, and complex numbers.
Quantum physics is usually considered unapproachable because it deals with the behavior of extremely tiny particles. But in this course, I will explain quantum physics through the behavior of polarized light. Light is an everyday phenomenon and you will be able to understand it easily.
Next we learn about quantum cryptography. Quantum cryptography is provably unbreakable. I will explain the BB84 quantum protocol for secure key sharing.
Then we will learn about the building-blocks of quantum programs which are quantum gates.
To understand how quantum gates work, we will study quantum superposition and quantum entanglement in depth.
We will apply what we have learned by constructing quantum circuits using Microsoft Q# (QSharp) and IBM Qiskit. For those of you who don't know the Python programming language, I will provide a crisp introduction of what you need to know.
We will begin with simple circuits and then progress to a full implementation of the BB84 quantum cryptography protocol in Qiskit.
The killer-app for quantum computing is quantum machine learning.
To understand quantum machine learning, we must first learn how classical machine learning works. I provide a crisp introduction to classical machine learning and neural networks (deep learning).
Finally, we will train a Quantum Support Vector Machine on real-world data and use it to make predictions.
For a better learning experience, open the transcript panel.
You will see a small "transcript" button at the bottom-right of the video player on Udemy's website. If you click this button, the transcript of the narration will be displayed. The transcripts for all the videos have been hand-edited for accuracy. Opening the transcript panel will help you understand the concepts better.
If you missed an important concept, then you can click on text in the transcript panel to return directly to the part you want to repeat. Conversely, if you already understand the concept being presented, you can click on text in the transcript panel to skip ahead in the video.
Pacing : This course is designed to be slow with a lot of repetition.
Quantum physics is easier for beginners to understand when concepts are repeated. If you want to learn at a faster pace, then open the transcripts panel (as explained in the previous paragraph above) and click the transcript-text to skip ahead to the next concept.
Enroll today and join the quantum revolution!
Instructor Details
- 4.5 Rating
5,610 Reviews
Kumaresan Ramanathan
I am passionate about making technology easy to understand. I have taught students at the University of Massachusetts and guided software professionals at Cadence Design Systems, iCOMS, Empirix, Relona, and Johnson & Johnson.
My goal is to help you earn more than $200,000 annually as a software professional. I focus on teaching AI and Quantum Computing because these are the highest paid skills in the industry.
My courses help beginners who have a basic understanding of high school Math and coding. In about 6 months you can complete several courses and become an expert earning $200+ per hour.
In addition to teaching technical skills, I also help you build leadership ability. My courses discuss trade-offs between various technical choices and help you take wise decisions. As an expert software professional, you will be able to recommend solutions, suggest implementation choices, and guide software design.
My courses have a 30 day money back guarantee. Check out the free video previews and enroll today.
I have an electrical engineering degree from IIT and a masters degree in computer science from the University of Massachusetts. I have managed software teams and helped startups launch products in international markets.
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Reviews
By Raymond Daly on 8/11/2026
Overall , good introduction to all the components of QC. Followed most of the material, but there were one or two areas when I lost! I'll go back over the course again and apply all the worked examples.. Definitely would recommend the course
By Shobhit Vinod Kumar Gupta on 7/12/2026
The concept is explained in a good manner. Only request is to add more details around what do you mean by vertical and horizontal polarization. I had to learn this concept from external source and then I could able to relate it here.
By MEDISETTY BABYANUSHA on 7/11/2026
QC101 is a strong introductory course that successfully blends quantum computing fundamentals with emerging QML concepts. It’s best suited for learners with a technical background who want to explore quantum technologies in AI. With added depth in QML and structured assessments, it could evolve into a flagship foundational program.
By Ari Elkin on 7/7/2026
This is pretty epic stuff and would highly recommend even to just a casual learner
By Saksham Kumar on 6/23/2026
Every topic was explained in detail and complete understanding and knowledge of the content was delivered
By Nikeria Garrett on 4/26/2026
I have enjoyed learning from this course. I loved the breakdowns of every category. I just wish that I was able to accumulate more hands on learning and testing my knowledge.
By Anonymized User on 4/8/2026
It's a very basic course but it covers introduction to math, quantum computing, qiskit and machine learning that is all you need to start with QML. Of course it is not enough to become an expert, there is still a lot to learn.
By Alexandru Gal on 2/20/2026
Now what I expected but it did provide valuable insights into how and why would you use quantum computing.
By Manjunath Mahashetti on 1/30/2026
Great explanation of very difficult to comprehend topics! Thank god! Getting better sense of Quantum Computing, cant wait to get hands on Actual Qubits!
By Aaron Khan on 12/8/2025
Course content started of really well. Was thorough at the beginning. Was very repetitive on some parts which was really good, however, as you build concepts, how solutions are reached are not explained so concepts are cemented in the student's mind. I am about halfway through and these concepts are hard to remember. The other point is the lack of reference material makes learning difficult and emphasises the importances of walking through the applications.
Quality Score
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Overall Score : 90 / 100




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