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Fix signs of rotation gates in gate tutorial #3180

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Jul 29, 2020
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Fix signs of rotation gates in gate tutorial #3180

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6 changes: 3 additions & 3 deletions docs/gates.ipynb
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Expand Up @@ -211,11 +211,11 @@
"\n",
"**cirq.X / cirq.Y / cirq.Z** The [Pauli gates](https://en.wikipedia.org/wiki/Quantum_logic_gate#Pauli-X_gate) X, Y, and Z which rotate the state around the associated axis by one half-turn.\n",
"\n",
"**cirq.rx(rads)** A rotation about the Pauli 'X' axis in terms of radians. This is equivalent to `exp(-i X rads / 2) = cos(rads/2) I + i sin(rads/2) X`\n",
"**cirq.rx(rads)** A rotation about the Pauli 'X' axis in terms of radians. This is equivalent to `exp(-i X rads / 2) = cos(rads/2) I - i sin(rads/2) X`\n",
"\n",
"**cirq.ry(rads)** A rotation about the Pauli 'Y' axis in terms of radians. This is equivalent to `exp(-i Y rads / 2) = cos(rads/2) I + i sin(rads/2) Y`\n",
"**cirq.ry(rads)** A rotation about the Pauli 'Y' axis in terms of radians. This is equivalent to `exp(-i Y rads / 2) = cos(rads/2) I - i sin(rads/2) Y`\n",
"\n",
"**cirq.rz(rads)** A rotation about the Pauli 'Z' axis in terms of radians. This is equivalent to `exp(-i Z rads / 2) = cos(rads/2) I + i sin(rads/2) Z`\n",
"**cirq.rz(rads)** A rotation about the Pauli 'Z' axis in terms of radians. This is equivalent to `exp(-i Z rads / 2) = cos(rads/2) I - i sin(rads/2) Z`\n",
"\n",
"**cirq.XPowGate(exponent=t)** Rotations about the Pauli ``X`` axis, equivalent to ``cirq.X**t``. See [XPowGate](https://cirq.readthedocs.io/en/latest/generated/cirq.XPowGate.html) for its unitary matrix. Note that this has a global phase of e^{i·π·t/2} versus the traditionally defined rotation matrix, which can be modified by the optional parameter `global_shift`.\n",
"\n",
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