Eksekusi program

Contoh berikut memberikan sekilas pertama tentang bagaimana program Q# diimplementasikan:

/// # Sample
/// Bell States
///
/// # Description
/// Bell states or EPR pairs are specific quantum states of two qubits
/// that represent the simplest (and maximal) examples of quantum entanglement.
///
/// This Q# program implements the four different Bell states.

import Std.Diagnostics.*;
import Std.Measurement.*;

operation Main() : (Result, Result)[] {
    // Allocate the two qubits that will be used to create a Bell state.
    use register = Qubit[2];

    // This array contains a label and a preparation operation for each one
    // of the four Bell states.
    let bellStateTuples = [
        ("|Φ+〉", PreparePhiPlus),
        ("|Φ-〉", PreparePhiMinus),
        ("|Ψ+〉", PreparePsiPlus),
        ("|Ψ-〉", PreparePsiMinus)
    ];

    // Prepare all Bell states, show them using the `DumpMachine` operation
    // and measure the Bell state qubits.
    mutable measurements = [];
    for (label, prepare) in bellStateTuples {
        prepare(register);
        Message($"Bell state {label}:");
        DumpMachine();
        measurements += [(MResetZ(register[0]), MResetZ(register[1]))];
    }
    return measurements;
}

operation PreparePhiPlus(register : Qubit[]) : Unit {
    ResetAll(register);             // |00〉
    H(register[0]);                 // |+0〉
    CNOT(register[0], register[1]); // 1/sqrt(2)(|00〉 + |11〉)
}

operation PreparePhiMinus(register : Qubit[]) : Unit {
    ResetAll(register);             // |00〉
    H(register[0]);                 // |+0〉
    Z(register[0]);                 // |-0〉
    CNOT(register[0], register[1]); // 1/sqrt(2)(|00〉 - |11〉)
}

operation PreparePsiPlus(register : Qubit[]) : Unit {
    ResetAll(register);             // |00〉
    H(register[0]);                 // |+0〉
    X(register[1]);                 // |+1〉
    CNOT(register[0], register[1]); // 1/sqrt(2)(|01〉 + |10〉)
}

operation PreparePsiMinus(register : Qubit[]) : Unit {
    ResetAll(register);             // |00〉
    H(register[0]);                 // |+0〉
    Z(register[0]);                 // |-0〉
    X(register[1]);                 // |-1〉
    CNOT(register[0], register[1]); // 1/sqrt(2)(|01〉 - |10〉)
}

Program ini mengimplementasikan empat status dasar entanglemen kuantum, dan merupakan salah satu program sampel termasuk ekstensi Azure Quantum Visual Code.

Anda dapat menjalankan program dari simulator bawaan di ekstensi QDK Visual Studio Code dan mendapatkan output standar

Message: Bell state |Φ+〉:

DumpMachine:

 Basis | Amplitude      | Probability | Phase
 -----------------------------------------------
  |00⟩ |  0.7071+0.0000𝑖 |    50.0000% |   0.0000
  |11⟩ |  0.7071+0.0000𝑖 |    50.0000% |   0.0000

Message: Bell state |Φ-〉:

DumpMachine:

 Basis | Amplitude      | Probability | Phase
 -----------------------------------------------
  |00⟩ |  0.7071+0.0000𝑖 |    50.0000% |   0.0000
  |11⟩ | −0.7071+0.0000𝑖 |    50.0000% |  -3.1416

Message: Bell state |Ψ+〉:

DumpMachine:

 Basis | Amplitude      | Probability | Phase
 -----------------------------------------------
  |01⟩ |  0.7071+0.0000𝑖 |    50.0000% |   0.0000
  |10⟩ |  0.7071+0.0000𝑖 |    50.0000% |   0.0000

Message: Bell state |Ψ-〉:

DumpMachine:

 Basis | Amplitude      | Probability | Phase
 -----------------------------------------------
  |01⟩ |  0.7071+0.0000𝑖 |    50.0000% |   0.0000
  |10⟩ | −0.7071+0.0000𝑖 |    50.0000% |  -3.1416

Result: "[(One, One), (Zero, Zero), (One, Zero), (Zero, One)]"
Finished shot 1 of 1

Q# simulation completed.

atau jalankan simulator dengan output histogram

Untuk menjalankan program pada perangkat keras kuantum, program pertama-tama perlu dikompilasi dan dikirimkan ke Azure Quantum, yang semuanya dapat dilakukan dari dalam Visual Studio Code. Untuk proses end-to-end lengkap, lihat Mulai menggunakan program Q# dan Visual Studio Code.