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use crate::{complex, ColumnVector, Complex, Matrix, Vector, VectorMatrix};
use core::{fmt, ops};
pub type QuantumState = ColumnVector<Complex<f64>>;
pub type QuantumBit = QuantumState;
#[derive(Clone)]
pub struct QuantumGate {
pub name: &'static str,
pub matrix: Matrix<Complex<f64>>,
}
#[derive(Clone)]
pub struct ClassicalRegister {
bits: Vec<i32>,
}
#[derive(Clone)]
pub struct QuantumRegister {
state_vector: QuantumState,
qubits: Vec<QuantumBit>,
}
#[macro_export]
macro_rules! count {
() => { 0 };
($head:expr $(,$tail:expr)*) => { 1 + count!($( $tail ),*) };
}
#[macro_export]
macro_rules! qubit {
($(($re:expr, $im:expr)),*) => {
{
let mut vector = Vec::new();
$(
vector.push(complex!($re, $im));
)*
QuantumBit::new(vector)
}
};
}
#[macro_export]
macro_rules! quantum_register {
($($bit:expr),*) => {
{
const N: usize = count!($($bit),*);
let mut bits: [QuantumBit; N] = [$($bit),*];
QuantumRegister::from(&mut bits)
}
};
}
impl QuantumBit {
pub fn state_0() -> QuantumBit {
QuantumBit::new(vec![complex!(1.0, 0.0), complex!(0.0, 0.0)])
}
pub fn state_1() -> QuantumBit {
QuantumBit::new(vec![complex!(0.0, 0.0), complex!(1.0, 0.0)])
}
}
impl fmt::Display for QuantumGate {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(f, "{}", self.name)
}
}
impl ClassicalRegister {
pub fn new(count: usize) -> ClassicalRegister {
ClassicalRegister {
bits: Vec::with_capacity(count),
}
}
pub fn set_bits(&mut self, bits: Vec<i32>) {
self.bits = bits;
}
pub fn get_bits(&self) -> Vec<i32> {
self.bits.clone()
}
}
impl QuantumRegister {
fn update(&mut self) {
let matrices: Vec<Matrix<Complex<f64>>> =
self.qubits.iter().map(|qubit| qubit.to_matrix()).collect();
let mut new_result = matrices[0].clone();
for matrix in &matrices[1..] {
new_result = new_result.kronecker(matrix);
}
self.state_vector = ColumnVector::from_matrix(&new_result);
}
pub fn new(count: usize) -> QuantumRegister {
QuantumRegister::from(&mut vec![QuantumBit::state_0(); count])
}
pub fn from(bits: &mut [QuantumBit]) -> QuantumRegister {
let mut register = QuantumRegister {
qubits: bits.to_vec(),
state_vector: ColumnVector::new(vec![]),
};
register.update();
register
}
pub fn get_bits(&self) -> Vec<QuantumBit> {
self.qubits.clone()
}
pub fn get_state(&self) -> QuantumState {
self.state_vector.clone()
}
}
impl ops::Index<usize> for QuantumRegister {
type Output = QuantumBit;
fn index(&self, index: usize) -> &Self::Output {
&self.qubits[index]
}
}
impl ops::IndexMut<usize> for QuantumRegister {
fn index_mut(&mut self, index: usize) -> &mut Self::Output {
&mut self.qubits[index]
}
}
impl ops::Index<usize> for ClassicalRegister {
type Output = i32;
fn index(&self, index: usize) -> &Self::Output {
&self.bits[index]
}
}
impl ops::IndexMut<usize> for ClassicalRegister {
fn index_mut(&mut self, index: usize) -> &mut Self::Output {
&mut self.bits[index]
}
}
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