QVNT

Advanced quantum computation simulator, written in Rust

Features

1. Ability to simulate up to 64 qubits. Common machine with 4-16 Gb of RAM is able to simulate 26-28 qubits, which is enough for several study cases;
2. Set of 1- or 2-qubits operations to build your own quantum circuits;
3. Quantum operations are tested and debugged to be safe in use;
4. Circuit execution is accelerated using multithreading Rayon library;
5. Complex quantum registers manipulations: tensor product of two registers and aliases for qubit to simplify interaction with register.

Usage

use qvnt::prelude::*;

//  create quantum register, called 'x', with 10 qubits
let mut q_reg = QReg::new(10);
//  or with initial state, where 3 qubits are already in state |1>
let mut q_reg = QReg::new(10).init_state(0b0011100000);

//  get virtual register 'x', to interact with specified qubits
let x = q_reg.get_vreg();

//  create qft operation, acting on first 5 qubits in q_reg
let op = op::qft(x[0] | x[1] | x[2] | x[3] | x[4]);

//  apply operation
q_reg.apply(&op);

//  measure and write first 3 qubit, which leads to collapse of q_reg wave function
println!("{}", q_reg.measure_mask(x[0] | x[1] | x[2]));

Implemented operations

• Pauli's X, Y & Z operators;
• S & T operators;
• Phase shift operator;
• 1-qubit rotation operators;
• 2-qubits rotation operators, aka Ising coupling gates;
• SWAP, iSWAP operators and square rooted ones;
• Quantum Fourier and Hadamard Transform;
• Universal U1, U2 and U3 operators;

ALL operators have inverse versions, accessing by .dgr() method:

use qvnt::prelude::*;

let usual_op = op::s(0b1);
//  Inverse S operator
let inverse_op = op::s(0b1).dgr();

Also, ALL these operators could be turned into controlled ones, using .c(...) method:

use qvnt::prelude::*;

let usual_op = op::x(0b001);
//  NOT gate, controlled by 2 qubits, aka CCNOT gate, aka Toffoli gate
let controlled_op = op::x(0b001).c(0b110).unwrap();

Controlled operation has to be unwrapped, since it could be None if its mask overlaps with the mask of operator. For example, this code will panic:

use qvnt::prelude::*;
let _ = op::x(0b001).c(0b001).unwrap();

In work

1. Implementing vectorized operations;
2. Writing documentation for all modules;