Trident

Blazingly fast, GPU-enabled, super simple and flexible api for quantum computer emulation in rust.

Compatible with Windows, MacOS and Linux.

Built on top of ocl (OpenCL bindings for rust).

Features

• Easy to learn and well documented api.
• Fast simulation of dozens of qbits thanks to a GPU implementation.
• Default gates (Identity, Hadamard, X, Y, Z) and custom gates generators (Phase shift, unitary, ...).
• Subroutine system to reuse circuits inside a program.
• Automatic generation of controlled versions of gates.
• Automatic generation of inverse gates and subroutines allowing easy uncomputation.

Getting started

You will have to install an OpenCL library in order to compile the ocl crate. They are available on all major desktop OS.

Examples

You can find many more examples in the examples/ directory of this repository.

Here is Hadamard's transform applied to a 3 qbits state, a very simple example:

use trident::{Computer, InstructionChain};

fn main() {
    // Creates a new computer with 3 qbits.
    let mut computer = Computer::new(3)
        .add_default_gates()
        .build();

    // Initialize the state with |000> and applies the
    // Hadamard gate to all three qbits.
    // Performs 5000 measurements.
    let program = computer.new_program("|000>")
        .apply_iter("H", 0..3, None)
        .measure(5000);

    // Runs the program and prints the results.
    let results = computer.run(program, None);
    println!("{}", results);
}

Output:

[Measurements obtained in 3 ms]
[Sample count of 5000]
[Top results:
    |011> ~> 12.64%,
    |000> ~> 12.60%,
    |100> ~> 12.60%,
    |010> ~> 12.50%,
    |111> ~> 12.48%,
    |110> ~> 12.44%,
    |101> ~> 12.42%,
    |001> ~> 12.32%
]

Roadmap

• Replace the command chains by some attribute macros to turn normal rust code into quantum code (trident 2).
• Replace ocl by a more modern crate langage like gfx-rs or vulkano. Replace the OpenCL shader by a more modern shader langage as well, like Vulkano or SPIR-V.

References

Adam Kelly, Simulating Quantum Computers Using OpenCL (pdf)

David B. Thomas, The MWC64X Random Number Generator