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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,244 @@ | ||
| { | ||
| "cells": [ | ||
| { | ||
| "cell_type": "code", | ||
| "execution_count": null, | ||
| "id": "3b990f88", | ||
| "metadata": {}, | ||
| "outputs": [], | ||
| "source": [ | ||
| "# Copyright 2023 The Cirq Developers\n", | ||
| "#\n", | ||
| "# Licensed under the Apache License, Version 2.0 (the \"License\");\n", | ||
| "# you may not use this file except in compliance with the License.\n", | ||
| "# You may obtain a copy of the License at\n", | ||
| "#\n", | ||
| "# https://www.apache.org/licenses/LICENSE-2.0\n", | ||
| "#\n", | ||
| "# Unless required by applicable law or agreed to in writing, software\n", | ||
| "# distributed under the License is distributed on an \"AS IS\" BASIS,\n", | ||
| "# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n", | ||
| "# See the License for the specific language governing permissions and\n", | ||
| "# limitations under the License." | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "markdown", | ||
| "id": "bf9c80ce", | ||
| "metadata": {}, | ||
| "source": [ | ||
| "# Gate with Registers\n", | ||
| "\n", | ||
| "This package includes a subclass of `cirq.Gate` called `GateWithRegisters`. Instead of operating on a flat list of `cirq.Qid`, this lets the developer define gates in terms of named registers of given widths." | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "markdown", | ||
| "id": "c0833444", | ||
| "metadata": {}, | ||
| "source": [ | ||
| "## `Signature`\n", | ||
| "\n", | ||
| "`Register` objects have a name, a bitsize and a shape. `Signature` is an ordered collection of `Register` with some helpful methods." | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "code", | ||
| "execution_count": null, | ||
| "id": "c75414f2", | ||
| "metadata": {}, | ||
| "outputs": [], | ||
| "source": [ | ||
| "from qualtran import Register, Signature\n", | ||
| "\n", | ||
| "control_reg = Register(name='control', bitsize=2)\n", | ||
| "target_reg = Register(name='target', bitsize=3)\n", | ||
| "control_reg, target_reg" | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "code", | ||
| "execution_count": null, | ||
| "id": "b38d210c", | ||
| "metadata": {}, | ||
| "outputs": [], | ||
| "source": [ | ||
| "r = Signature([control_reg, target_reg])\n", | ||
| "r" | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "markdown", | ||
| "id": "2b32274b", | ||
| "metadata": {}, | ||
| "source": [ | ||
| "You can also use the `build` factory method to quickly define a set of registers" | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "code", | ||
| "execution_count": null, | ||
| "id": "4f10e66e", | ||
| "metadata": {}, | ||
| "outputs": [], | ||
| "source": [ | ||
| "r == Signature.build(\n", | ||
| " control=2,\n", | ||
| " target=3,\n", | ||
| ")" | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "markdown", | ||
| "id": "a5955208", | ||
| "metadata": {}, | ||
| "source": [ | ||
| "### `GateWithRegisters`" | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "code", | ||
| "execution_count": null, | ||
| "id": "b3957db4", | ||
| "metadata": {}, | ||
| "outputs": [], | ||
| "source": [ | ||
| "import cirq\n", | ||
| "from qualtran import GateWithRegisters\n", | ||
| "\n", | ||
| "class MyGate(GateWithRegisters):\n", | ||
| " \n", | ||
| " @property\n", | ||
| " def signature(self):\n", | ||
| " return Signature.build(\n", | ||
| " control=2,\n", | ||
| " target=3,\n", | ||
| " )\n", | ||
| " \n", | ||
| " def decompose_from_registers(self, context, control, target):\n", | ||
| " assert len(control) == 2\n", | ||
| " assert len(target) == 3\n", | ||
| " \n", | ||
| " for c in control:\n", | ||
| " for t in target:\n", | ||
| " yield cirq.CNOT(c, t)\n", | ||
| " " | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "code", | ||
| "execution_count": null, | ||
| "id": "2de931eb", | ||
| "metadata": {}, | ||
| "outputs": [], | ||
| "source": [ | ||
| "gate = MyGate()\n", | ||
| "gate" | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "code", | ||
| "execution_count": null, | ||
| "id": "ef98f3a2", | ||
| "metadata": {}, | ||
| "outputs": [], | ||
| "source": [ | ||
| "# Number of qubits is derived from registers\n", | ||
| "cirq.num_qubits(gate)" | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "markdown", | ||
| "id": "2d725646", | ||
| "metadata": {}, | ||
| "source": [ | ||
| "The `Signature` object can allocate a dictionary of `cirq.NamedQubit` that we can use to turn our `Gate` into an `Operation`. `GateWithRegisters` exposes an `on_registers` method to compliment Cirq's `on` method where we can use names to make sure each qubit is used appropriately." | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "code", | ||
| "execution_count": null, | ||
| "id": "057148da", | ||
| "metadata": {}, | ||
| "outputs": [], | ||
| "source": [ | ||
| "from qualtran._infra.gate_with_registers import get_named_qubits\n", | ||
| "\n", | ||
| "r = gate.signature\n", | ||
| "quregs = get_named_qubits(r)\n", | ||
| "quregs" | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "code", | ||
| "execution_count": null, | ||
| "id": "0257d8f1", | ||
| "metadata": {}, | ||
| "outputs": [], | ||
| "source": [ | ||
| "operation = gate.on_registers(**quregs)\n", | ||
| "operation" | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "code", | ||
| "execution_count": null, | ||
| "id": "541f2e91", | ||
| "metadata": {}, | ||
| "outputs": [], | ||
| "source": [ | ||
| "from cirq.contrib.svg import SVGCircuit\n", | ||
| "SVGCircuit(cirq.Circuit(operation))" | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "markdown", | ||
| "id": "6686f7f8", | ||
| "metadata": {}, | ||
| "source": [ | ||
| "## `GateHelper`\n", | ||
| "\n", | ||
| "Since `GateWithRegisters` contains enough metadata to derive qubits, an operation, and a circuit we provide a helper class to provide easy access to these quantities." | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "code", | ||
| "execution_count": null, | ||
| "id": "93a6c8f2", | ||
| "metadata": {}, | ||
| "outputs": [], | ||
| "source": [ | ||
| "import qualtran.cirq_interop.testing as cq_testing\n", | ||
| "\n", | ||
| "g = cq_testing.GateHelper(gate)\n", | ||
| "\n", | ||
| "print('r:', g.r)\n", | ||
| "print('quregs:', g.quregs)\n", | ||
| "print('operation:', g.operation)\n", | ||
| "print('\\ncircuit:\\n', g.circuit)\n", | ||
| "print('\\n\\ndecomposed circuit:\\n', cirq.Circuit(cirq.decompose_once(g.operation)))" | ||
| ] | ||
| } | ||
| ], | ||
| "metadata": { | ||
| "kernelspec": { | ||
| "display_name": "Python 3", | ||
| "language": "python", | ||
| "name": "python3" | ||
| }, | ||
| "language_info": { | ||
| "codemirror_mode": { | ||
| "name": "ipython", | ||
| "version": 3 | ||
| }, | ||
| "file_extension": ".py", | ||
| "mimetype": "text/x-python", | ||
| "name": "python", | ||
| "nbconvert_exporter": "python", | ||
| "pygments_lexer": "ipython3", | ||
| "version": "3.8.16" | ||
| } | ||
| }, | ||
| "nbformat": 4, | ||
| "nbformat_minor": 5 | ||
| } |
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