Blueqat 0.3.12

Release Date: 20 Jan. 2020

New features

Circuit repr

Circuit.__repr__ method is implemented.
Now, Circuit is printable.

c = Circuit().x[0].rz(1.2)[1]
c.cx[0, 1]
print(c)
# => Circuit(2).x[0].rz(1.2)[1].cx[0, 1]

Modifications

Adjust global phase

These are Blueqat standard implementation of global phase.

RZ and U1 gate:

[e^-iθ/2, 0],
[0, e^iθ/2]

Phase gate (, S gate [θ=π/2], S† gate [θ=-π/2], T gate [θ=π/4], T† gate [θ=-π/4]):

[1, 0],
[0, e^iθ]

U3 gate (, U2 gate [θ=π/2] ):

[e^-i(φ+λ)/2 cos θ/2, -e^-i(φ-λ)/2 sin θ/2],
[e^i(φ-λ)/2 sin θ/2, e^i(φ+λ)/2 cos θ/2]

CRZ gate:

[1, 0, 0, 0],
[0, 1, 0, 0],
[0, 0, e^-iθ/2, 0],
[0, 0, 0, e^iθ/2]

CPhase, CU1 gate:

[1, 0, 0, 0],
[0, 1, 0, 0],
[0, 0, 1, 0],
[0, 0, 0, e^iθ]

CU3 gate (, CU2 gate [θ=π/2] ):

[1, 0, 0, 0],
[0, 1, 0, 0],
[0, 0, e^-i(φ+λ)/2 cos θ/2, -e^-i(φ-λ)/2 sin θ/2],
[0, 0, e^i(φ-λ)/2 sin θ/2, e^i(φ+λ)/2 cos θ/2]

Note that the phase of U1 and CU1 are not corresponded.
This is due to OpenQASM's qelib1.inc implementations.
We recommend to use RZ/CRZ and PHASE/CPHASE instead of U1/CU1 gate if the circuit is not ported from Qiskit/OpenQASM.

Bug Fix

numba backend

Correct bugs in controlled gate of numba backend

Install

New install
pip install blueqat

Update
pip install -U blueqat