Qrisp to Cirq converter

[purva-thakre]

No description provided.

[ACE07-Sev]

For global phase, what is the issue exactly?

[purva-thakre]

For global phase, what is the issue exactly?

Cirq's global phase gate's parameter is incompatible with the input parameter of Qrisp's global phase gate. For now, we are temporarily ignoring this gate in the conversion function until I figure out a generic mapping between the two.

[ACE07-Sev]

Cirq takes np.exp(1j*theta) directly. You need to just pass that instead of pure theta. If you have an assertion for this, I can do it and give you what you'll need to put.

[purva-thakre]

Not exactly that straightforward. Thanks for the offer. I have a couple of local implementations already but they are not completely generic.

[ACE07-Sev]

Not exactly that straightforward

Could be that I'm misunderstanding what you're looking for then?

In any case, I wrote this for you so you can try it out and see if this is what you wanted :) .

from qrisp import *
import cirq
from numpy.testing import assert_almost_equal

def main():
    qv = QuantumBool()

    h(qv)
    gphase(0.1, qv)

    return qv.qs.statevector("array")

qc = cirq.Circuit()
q = cirq.LineQubit.range(1)

qc.append(cirq.ops.H(q[0]))
qc.append(cirq.ops.GlobalPhaseGate(np.exp(1j * 0.1))())

target = cirq.final_state_vector(qc)
current = main()

assert_almost_equal(target, current)

[positr0nium]

What exactly is the issue here? Why doesn't the global phase gate work? I know we discussed this but I still didn't fully understand.

[positr0nium]

I think there is still an issue here. I'd expect that you somehow have to specify the relevant cirq qubits. This bugged example confirms my suspicion:

from qrisp import *

qc = QuantumCircuit(4)
qc.rxx(0.3, 0, 1)
qc.rxx(0.3, 2, 3)
print(qc.to_cirq())
# 0: ───H───@─────────────@───H───H───@─────────────@───H───
#           │             │           │             │
# 1: ───H───X───Z^0.095───X───H───H───X───Z^0.095───X───H───

[positr0nium]

Apart from the mentioned issue, I think it's done - thank you :)
One final thing: Please also make sure to insert the method here and check if the generated docs look good.