Release v0.18.0

Main changes:

21a47f3 Remove Register.rotate() (#642)
20e6765 FIX: Redefine slope of RampWaveform (#644)
c2d5b6c Enabling definition of multiple noise channels and noise channels in XY (#647)
bcb78cc Enable digital simulation (#652)
0f6e3dd Improve access to output modulation durations (#663)
188d21d Remove deprecated noise arguments (#674)
f303138 Adding relaxation noise channel (#675)
716b86b Centralize all backend imports from a single pulser.backends module (#678)
96a8c34 Add hyperfine dephasing rate to NoiseModel (#680)
4981ca6 Add optional default noise models to devices (#676)
c695373 Rectangular lattice register and layout (#665)

.flake8

@@ -14,4 +14,5 @@ per-file-ignores =
   # F401 Module imported but unused
   tests/*: D100, D101, D102, D103
   __init__.py: F401
+  pulser-core/pulser/backends.py: F401
   setup.py: D100

.github/workflows/ci.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out Pulser
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Pulser + flake8 install
         uses: ./.github/workflows/pulser-setup
         with:
@@ -23,7 +23,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out Pulser
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Pulser + black install
         uses: ./.github/workflows/pulser-setup
         with:
@@ -34,7 +34,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out Pulser
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Pulser + isort install
         uses: ./.github/workflows/pulser-setup
         with:
@@ -45,7 +45,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out Pulser
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Pulser + mypy install
         uses: ./.github/workflows/pulser-setup
         with:
@@ -61,7 +61,7 @@ jobs:
         python-version: ["3.8", "3.11"]
     steps:
       - name: Check out Pulser
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Pulser + pytest install
         uses: ./.github/workflows/pulser-setup
         with:

.github/workflows/publish.yml

@@ -13,11 +13,11 @@ jobs:
       id-token: write
     steps:
       - name: Check out Pulser
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           ref: ${{ github.ref }}
       - name: Set up Python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: 3.9
       - name: Install Python dependencies
@@ -69,11 +69,11 @@ jobs:
         python-version: ["3.8", "3.9", "3.10", "3.11"]
     steps:
       - name: Check out Pulser
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           ref: ${{ github.ref }}
       - name: Set up Python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
       - name: Install Pulser from PyPI

.github/workflows/pulser-setup/action.yml

@@ -4,19 +4,19 @@ inputs:
   python-version:
     description: Python version
     required: false
-    default: '3.9'
+    default: "3.9"
   extra-packages:
     description: Extra packages to install (give to grep)
     required: false
-    default: ''
+    default: ""
 runs:
-  using: 'composite'
-  steps: 
+  using: "composite"
+  steps:
     - name: Set up Python
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ inputs.python-version }}
-        cache: 'pip'
+        cache: "pip"
     - name: Install Pulser
       shell: bash
       run: |
@@ -28,4 +28,4 @@ runs:
       run: |
         grep -e ${{ inputs.extra-packages }} dev_requirements.txt \
           | sed 's/ //g' \
-          | xargs pip install
+          | xargs pip install

.github/workflows/test.yml

@@ -15,11 +15,22 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, macos-latest, windows-latest]
+        # Python 3.8 and 3.9 does not run on macos-latest (14)
+        # Uses macos-13 for 3.8 and 3.9 and macos-latest for >=3.10 
+        os: [ubuntu-latest, macos-13, macos-latest, windows-latest]
         python-version: ["3.8", "3.9", "3.10", "3.11"]
+        exclude:
+          - os: macos-latest
+            python-version: "3.8"
+          - os: macos-latest
+            python-version: "3.9"
+          - os: macos-13
+            python-version: "3.10"
+          - os: macos-13
+            python-version: "3.11"
     steps:
       - name: Check out Pulser
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Pulser + pytest setup
         uses: ./.github/workflows/pulser-setup
         with:

.github/workflows/version.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out base branch
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           ref: ${{ github.event.pull_request.base.ref }}
       - name: Get old version
@@ -19,7 +19,7 @@ jobs:
           echo "Old version: $old_version"
           echo "old_version=$old_version" >> $GITHUB_ENV
       - name: Check out head branch
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Get new version
         run: |
           new_version="$(head -1 VERSION.txt)"

.pre-commit-config.yaml

@@ -1,6 +1,6 @@
 repos:
   - repo: https://github.com/psf/black
-    rev: 23.10.1
+    rev: 24.4.0
     hooks:
       - id: black-jupyter
 

VERSION.txt

@@ -1 +1 @@
-0.17.4
+0.18.0

dev_requirements.txt

@@ -1,5 +1,5 @@
 # tests
-black[jupyter] ~= 23.1
+black[jupyter] ~= 24.3
 flake8
 flake8-docstrings
 isort

docs/source/apidoc/backend.rst

@@ -12,6 +12,11 @@ QPU
 Emulators
 ----------
 
+Configuration
+^^^^^^^^^^^^^^
+.. autoclass:: pulser.EmulatorConfig
+   :members:
+
 Local
 ^^^^^^^
 .. autoclass:: pulser_simulation.QutipBackend

docs/source/apidoc/core.rst

@@ -110,7 +110,10 @@ which when associated with a :class:`pulser.Sequence` condition its development.
 
 .. autodata:: pulser.devices.DigitalAnalogDevice
 
-
+Noise Model
+--------------
+.. automodule:: pulser.noise_model
+  :members:
 
 Channels
 ---------------------

docs/source/apidoc/simulation.rst

@@ -21,7 +21,7 @@ in favour of :class:`QutipEmulator`.
 SimConfig
 ----------------------
 
-.. automodule:: pulser_simulation.simconfig
+.. autoclass:: pulser_simulation.SimConfig
    :members:
 
 Simulation Results

docs/source/index.rst

@@ -75,7 +75,7 @@ computers and simulators, check the pages in :doc:`review`.
    tutorials/noisy_sim
    tutorials/spam
    tutorials/laser_noise
-   tutorials/kraus_ops
+   tutorials/effective_noise
 
 .. toctree::
    :maxdepth: 1

pulser-core/MANIFEST.in

@@ -5,3 +5,4 @@ include pulser/json/abstract_repr/schemas/device-schema.json
 include pulser/json/abstract_repr/schemas/sequence-schema.json
 include pulser/json/abstract_repr/schemas/register-schema.json
 include pulser/json/abstract_repr/schemas/layout-schema.json
+include pulser/json/abstract_repr/schemas/noise-schema.json

pulser-core/pulser/__init__.py

@@ -26,11 +26,11 @@
 )
 from pulser.pulse import Pulse
 from pulser.register import Register, Register3D
+from pulser.noise_model import NoiseModel
 from pulser.devices import AnalogDevice, DigitalAnalogDevice, MockDevice
 from pulser.sequence import Sequence
 from pulser.backend import (
     EmulatorConfig,
-    NoiseModel,
     QPUBackend,
 )
 
@@ -42,6 +42,7 @@
     devices as devices,
     sampler as sampler,
     backend as backend,
+    backends as backends,
 )
 
 __all__ = [
@@ -58,6 +59,8 @@
     # pulser.register
     "Register",
     "Register3D",
+    # pulser.noise_model
+    "NoiseModel",
     # pulser.devices
     "AnalogDevice",
     "DigitalAnalogDevice",
@@ -66,6 +69,5 @@
     "Sequence",
     # pulser.backends
     "EmulatorConfig",
-    "NoiseModel",
     "QPUBackend",
 ]

pulser-core/pulser/backend/__init__.py

@@ -13,8 +13,9 @@
 # limitations under the License.
 """Classes for backend execution."""
 
+import pulser.noise_model as noise_model  # For backwards compat
 from pulser.backend.config import EmulatorConfig
-from pulser.backend.noise_model import NoiseModel
+from pulser.noise_model import NoiseModel  # For backwards compat
 from pulser.backend.qpu import QPUBackend
 
 __all__ = ["EmulatorConfig", "NoiseModel", "QPUBackend"]

pulser-core/pulser/backend/config.py

@@ -19,7 +19,7 @@
 
 import numpy as np
 
-from pulser.backend.noise_model import NoiseModel
+from pulser.noise_model import NoiseModel
 
 EVAL_TIMES_LITERAL = Literal["Full", "Minimal", "Final"]
 
@@ -63,15 +63,22 @@ class EmulatorConfig(BackendConfig):
 
             - "all-ground" for all atoms in the ground state
             - An array of floats with a shape compatible with the system
+
         with_modulation: Whether to emulate the sequence with the programmed
             input or the expected output.
+        prefer_device_noise_model: If the sequence's device has a default noise
+            model, this option signals the backend to prefer it over the noise
+            model given with this configuration.
         noise_model: An optional noise model to emulate the sequence with.
+            Ignored if the sequence's device has default noise model and
+            `prefer_device_noise_model=True`.
     """
 
     sampling_rate: float = 1.0
     evaluation_times: float | Sequence[float] | EVAL_TIMES_LITERAL = "Full"
     initial_state: Literal["all-ground"] | Sequence[complex] = "all-ground"
     with_modulation: bool = False
+    prefer_device_noise_model: bool = False
     noise_model: NoiseModel = field(default_factory=NoiseModel)
 
     def __post_init__(self) -> None:

pulser-core/pulser/backends.py

@@ -0,0 +1,52 @@
+# Copyright 2024 Pulser Development Team
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""A module gathering all available backends."""
+from __future__ import annotations
+
+import importlib
+from typing import TYPE_CHECKING, Type
+
+from pulser.backend.abc import Backend
+
+if TYPE_CHECKING:
+    from pulser.backend import QPUBackend as QPUBackend
+    from pulser_pasqal import EmuFreeBackend as EmuFreeBackend
+    from pulser_pasqal import EmuTNBackend as EmuTNBackend
+    from pulser_simulation import QutipBackend as QutipBackend
+
+_BACKENDS = {
+    "QPUBackend": "pulser.backend",
+    "QutipBackend": "pulser_simulation",
+    "EmuFreeBackend": "pulser_pasqal",
+    "EmuTNBackend": "pulser_pasqal",
+}
+
+
+# This prevents * imports to attempt importing unavailable backends
+__all__: list[str] = []
+
+
+def __getattr__(name: str) -> Type[Backend]:
+    if name not in _BACKENDS:
+        raise AttributeError(f"Module {__name__!r} has no attribute {name!r}.")
+    try:
+        return getattr(  # type: ignore
+            importlib.import_module(_BACKENDS[name]),
+            name,
+        )
+    except ModuleNotFoundError:
+        raise AttributeError(
+            f"{name!r} requires the {_BACKENDS[name]!r} package. To install "
+            f"it, run `pip install {_BACKENDS[name]}`."
+        )

pulser-core/pulser/channels/base_channel.py

@@ -75,7 +75,7 @@ class Channel(ABC):
     clock_period: int = 1  # ns
     min_duration: int = 1  # ns
     max_duration: Optional[int] = int(1e8)  # ns
-    min_avg_amp: int = 0
+    min_avg_amp: float = 0
     mod_bandwidth: Optional[float] = None  # MHz
     eom_config: Optional[BaseEOM] = field(init=False, default=None)