QSim: Quantum Computer Simulator Toolkit

Playground for anyone passionate to learn or experiment in quantum computing, be it students, faculty or researchers.


About QSim

The Quantum Computing Toolkit Project is one of the first initiatives in the country to address the common challenge of advancing the Quantum Computing research frontiers in India.

The project is accomplished by multidisciplinary groups of academicians, scientists, engineers and industry from various leading organizations including – IISc, IIT-Roorkee and C-DAC.

The QSim is like a playground for anyone passionate to learn or experiment in quantum computing, be it students, faculty or researchers.

The QSim offers a robust QC Simulator integrated with a GUI based workbench in which you can create quantum circuits and quantum programs, view the outputs, online help, solved examples and related literature/material.

IIT Roorkee


Quantum Circuits

Simulate quantum circuits

Dynamic simulation of quantum circuits with custom parameters.

Noise Parameters

Quantum Noise

Realistic simulator considering effects of noise


Intuitive UI

Intuitive UI/UX helps users to conceptualize and create quantum programs

Secured Login

Secured user management

Secure user management with options to save quantum programs/circuits

Code editor

Code editor

Advanced Python code editor for Quantum Circuits.

Online Help

Examples & Help

Online help, solved examples, and learning material. 

QC Workbench

Qiskit Aakash

Qiskit Aakash is a software library developed by the Indian Institute of Science that simulates noisy quantum logic circuits. It represents quantum states by their density matrices in the Pauli basis and incorporates possible errors in initialization, logic gates, memory, and measurement using simple models. The simulator is implemented as a new backend to IBM’s Qiskit framework.

Download Qiskit Aakash.  The repository contains detailed examples explaining the various features of the simulator. The easiest way is to load the repository into the Binder Image and use Jupyter notebook.

The details about the implementation of the density matrix simulator have been explained in arxiv paper 1908.05154

Knowledge Base

Quantum Simulator

QSim provide a platform for researchers to explore quantum computers that are difficult to obtain. IISc has developed a realistic quantum computer simulator named dm-sim (based on Density Matrix Formalism). It simulates the behavior/execution of quantum circuits on...

Quantum Computer

Computers that perform computations using quantum phenomena such as superposition and entanglement, are known as quantum computers. Building a quantum computer is very challenging and expensive, as it requires highly sensitive components and highly controlled...

Contact Us

Have a query or a feedback? Reach out to us to learn more about the Quantum Simulator Toolkit and we will be in touch with you at the earliest.

Email Us

qcworkbench [at] cdac [dot ] in

Upcoming Events

Workshop on Quantum Computing & Communication

Dates: 15th Sep 2022 to 16th Sep 2022

Venue: CDAC, EC, Bangalore
Email: quantum-outreach-blr [at] cdac [dot] in

The Workshop features expert talks from quantum researchers and practitioners, exclusive hands-on, case studies and tools, and first-hand experience with educative lab walkthroughs. This Workshop targets a wide array of participants ranging from scientists, senior managers, decision-makers, research scholars, and technology officers to general quantum enthusiasts.