From 828c86c0a86c9fe54aca42a6de556d0a6e5ea5fd Mon Sep 17 00:00:00 2001
From: BrunoLiegiBastonLiegi <andreapapaluca@gmail.com>
Date: Thu, 27 Nov 2025 13:16:51 +0100
Subject: [PATCH] feat: removed self.np references + dep and lock

---
 poetry.lock                  | 6 +++---
 pyproject.toml               | 2 +-
 src/qibotn/backends/quimb.py | 8 ++++----
 3 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/poetry.lock b/poetry.lock
index f052f87..f789c4d 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -2488,8 +2488,8 @@ qulacs = ["qulacs (>=0.6.4,<0.7.0) ; python_version < \"3.13\""]
 [package.source]
 type = "git"
 url = "https://github.com/qiboteam/qibo"
-reference = "HEAD"
-resolved_reference = "a582ddc9fe011e39362a440a6c2c2d21a6de7649"
+reference = "backends"
+resolved_reference = "2bfe46abdfcf84486cbfddb4fe4c9164a47e8486"
 
 [[package]]
 name = "qiskit"
@@ -3329,4 +3329,4 @@ qmatchatea = ["qiskit", "qmatchatea", "qtealeaves"]
 [metadata]
 lock-version = "2.1"
 python-versions = ">=3.11,<3.14"
-content-hash = "6ca68814561b66decbfb6b314e5f8cd91552f95548ed501e43e4a915d1079680"
+content-hash = "e7fa6e7a211343674411b5fb57f7cd79a5ebbb06ad755a7978f5f81bca1e8ca1"
diff --git a/pyproject.toml b/pyproject.toml
index a4fa477..c95f764 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -21,7 +21,7 @@ packages = [{ include = "qibotn", from = "src" }]
 
 [tool.poetry.dependencies]
 python = ">=3.11,<3.14"
-qibo = { git="https://github.com/qiboteam/qibo" }
+qibo = { git="https://github.com/qiboteam/qibo", branch="backends" }
 quimb = { version = "^1.10.0", extras = ["tensor"] }
 cupy-cuda11x = { version = "^13.1.0", optional = true }
 cuquantum-python-cu11 = { version = "^24.1.0", optional = true }
diff --git a/src/qibotn/backends/quimb.py b/src/qibotn/backends/quimb.py
index b2199d7..667122d 100644
--- a/src/qibotn/backends/quimb.py
+++ b/src/qibotn/backends/quimb.py
@@ -104,15 +104,15 @@ def setup_backend_specifics(
     if quimb_backend == "jax":
         import jax.numpy as jnp
 
-        self.np = jnp
+        self.engine = jnp
     elif quimb_backend == "numpy":
         import numpy as np
 
-        self.np = np
+        self.engine = np
     elif quimb_backend == "torch":
         import torch
 
-        self.np = torch
+        self.engine = torch
     else:
         raise_error(ValueError, f"Unsupported quimb backend: {quimb_backend}")
 
@@ -260,7 +260,7 @@ def expectation_observable_symbolic(
 
         expectation_value = expectation_value + coeff * exp_values
 
-    return self.np.real(expectation_value)
+    return self.real(expectation_value)
 
 
 def _qibo_circuit_to_quimb(