PYQRACK_HOST_POINTER_DEFAULT_ON

Makefile

@@ -24,7 +24,7 @@ help:
 build-deps:
 ifneq ($(OS),Windows_NT)
 ifeq ($(QRACK_PRESENT),)
-	git clone https://github.com/unitaryfund/qrack.git; cd qrack; git checkout 82e68a058a2fe471b3f89102a6a3e5f486387242; cd ..
+	git clone https://github.com/unitaryfund/qrack.git; cd qrack; git checkout d906dffdf033441e221573f989c3760bc325ca03; cd ..
 endif
 	mkdir -p qrack/build
 ifeq ($(UNAME_S),Linux)

pennylane_qrack/_version.py

@@ -16,4 +16,4 @@
    Version number (major.minor.patch[-label])
 """
 
-__version__ = "0.11.6"
+__version__ = "0.12.0"

pennylane_qrack/qrack_device.py

@@ -14,7 +14,6 @@
 """
 Base device class for PennyLane-Qrack.
 """
-from collections import OrderedDict
 from functools import reduce
 import cmath, math
 import os
@@ -30,8 +29,6 @@
     StatePrep,
     BasisState,
     QubitUnitary,
-    CRZ,
-    PhaseShift,
     Adjoint,
 )
 from pennylane.wires import Wires
@@ -162,7 +159,7 @@ class QrackDevice(QubitDevice):
     # Use CPU/GPU method hybridization? (Default is "false")
     isCpuGpuHybrid = True
     # Allocate GPU buffer from general host heap? (Default is "false"; "true" might improve performance or reliability in certain cases, like if using an Intel HD as accelerator)
-    isHostPointer = False
+    isHostPointer = True if os.environ.get('PYQRACK_HOST_POINTER_DEFAULT_ON') else False
     # Noise parameter. (Default is "0"; depolarizing noise intensity can also be controlled by "QRACK_GATE_DEPOLARIZATION" environment variable)
     noise = 0