Index: head/science/Makefile
===================================================================
--- head/science/Makefile
+++ head/science/Makefile
@@ -161,6 +161,7 @@
     SUBDIR += py-pysal
     SUBDIR += py-pyteomics
     SUBDIR += py-pyteomics.biolccc
+    SUBDIR += py-qspin
     SUBDIR += py-scikit-fuzzy
     SUBDIR += py-scikit-learn
     SUBDIR += py-scikit-sparse
Index: head/science/py-qspin/Makefile
===================================================================
--- head/science/py-qspin/Makefile
+++ head/science/py-qspin/Makefile
@@ -0,0 +1,20 @@
+# $FreeBSD$
+
+PORTNAME=	qspin
+DISTVERSION=	0.1.8
+CATEGORIES=	science
+MASTER_SITES=	CHEESESHOP
+PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
+
+MAINTAINER=	yuri@FreeBSD.org
+COMMENT=	Learn quantum spin and entanglement
+
+LICENSE=	GPLv3
+
+RUN_DEPENDS=	${PYNUMPY}
+
+USES=		python
+USE_PYTHON=	autoplist distutils
+NO_ARCH=	yes
+
+.include <bsd.port.mk>
Index: head/science/py-qspin/distinfo
===================================================================
--- head/science/py-qspin/distinfo
+++ head/science/py-qspin/distinfo
@@ -0,0 +1,3 @@
+TIMESTAMP = 1502400098
+SHA256 (qspin-0.1.8.tar.gz) = 2612f70338c0138d3e4d4aaa38f313584b6c5d09faacf6de52875ba26910f5f3
+SIZE (qspin-0.1.8.tar.gz) = 9312
Index: head/science/py-qspin/pkg-descr
===================================================================
--- head/science/py-qspin/pkg-descr
+++ head/science/py-qspin/pkg-descr
@@ -0,0 +1,12 @@
+This is a little package that will help with learning how quantum spin and
+entanglement work. It is meant to complement some of the "theoretical
+minimum" lectures and other web resources.
+* https://en.wikipedia.org/wiki/Pauli_matrices
+* https://en.wikipedia.org/wiki/Triplet_state
+* https://en.wikipedia.org/wiki/Von_Neumann_entropy
+* Book: Quantum Mechanics - The Theoretical Minimum, Leanoard Susskind and
+  Art Friedman, Basic Books, 2014. (mostly chapters 6&7)
+* http://theoreticalminimum.com/courses/quantum-mechanics/2012/winter/lecture-6
+  and lecture 7
+
+WWW: https://bitbucket.org/donald_gavel/qspin