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Run Quantum Computation Simulator with OpenQASM 3.0

Home Page: https://pkg.go.dev/github.com/itsubaki/qasm

License: MIT License

Makefile 0.52% Go 99.48%

quantum-computing quantum-computation openqasm

qasm's Introduction

qasm

Run Quantum Computation Simulator with OpenQASM 3.0

Install

go install github.com/itsubaki/qasm@latest

Example

$ cat testdata/bell.qasm
OPENQASM 3.0;
include "testdata/stdgates.qasm";

qubit[2] q;
reset q;

h q[0];
cx q[0], q[1];

$ qasm -f testdata/bell.qasm
[00][  0]( 0.7071 0.0000i): 0.5000
[11][  3]( 0.7071 0.0000i): 0.5000

REPL

$ qasm repl
>> OPENQASM 3.0;
>>
>> gate h q { U(pi/2.0, 0.0, pi) q; }
>> gate x q { U(pi, 0, pi) q; }
>> gate cx q, p { ctrl @ x q, p; }
>>
>> qubit[2] q;
[00][  0]( 1.0000 0.0000i): 1.0000
>> h q[0];
[00][  0]( 0.7071 0.0000i): 0.5000
[10][  2]( 0.7071 0.0000i): 0.5000
>> cx q[0], q[1];
[00][  0]( 0.7071 0.0000i): 0.5000
[11][  3]( 0.7071 0.0000i): 0.5000

built-in

U, X, Y, Z, H, S, T
QFT, IQFT, CMODEXP2
print

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qasm's Issues

`ctrl @` doesn’t work

https://qiskit.github.io/openqasm/language/gates.html

OPENQASM 3.0;
gate x q { U(pi, 0, pi) q; }

qubit[2] q;
qubit[2] r;
reset q, r;

x q;
ctrl @ x q, r[0];

got:
[11 10][  3   2]( 1.0000 0.0000i): 1.0000
want:
[11 00][  3   0]( 1.0000 0.0000i): 1.0000

Workaround

ctrl @ x q[0], r[0];
ctrl @ x q[1], r[0];

ctrl @ gate is not implemented

gate specification is

gate cx a, b { ctrl @ x a, b; }
qubit[2] q;
qubit r;

x q;
cx q, r;

// for j ← 0, 1 do
//  cx q[j], r;

[11 0] -> [11 1] -> [11 0]

But, ctrl specification is

qubit[2] q;
qubit r;

x q;
ctrl(2) @ x q, r;

[11 0] -> [11 1]

So,

cx q, r; != ctrl(2) @ x q, r;

It's confusing.

`ctrl @ x q, p;` isn't working

OPENQASM 3.0;
gate x q { U(pi, 0, pi) q; }

qubit q;
qubit p;

x q;
ctrl @ x q, p;

[0 0][  0   0]( 1.0000 0.0000i): 1.0000

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