Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

arXiv:1611.08047 · Quantum Information Processing

Topological aspects of quantum entanglement

Louis Hirsch Kauffman, Eshan Mehrotra

Published Feb 2, 2019• 20 citations
arXivHTMLPDF

Abstract

Kauffman and Lomonaco (New J Phys 4:73.1–73.18, 2002. arXiv:quant-ph/0401090 , New J Phys 6:134.1–134.40, 2004) explored the idea of understanding quantum entanglement (the non-local correlation of certain properties of particles) topologically by viewing unitary entangling operators as braiding operators. In Alagic et al. (Yang–Baxter operators need quantum entanglement to distinguish knots, 2015. arXiv:1507.05979v1 ), it is shown that entanglement is a necessary condition for forming non-trivial invariants of knots from braid closures via solutions to the Yang–Baxter equation. We show that the arguments used by Alagic et al. (2015) generalize to essentially the same results for quantum invariant state summation models of knots. In one case (the unoriented swap case) we give an example of a Yang–Baxter operator, and associated quantum invariant, that can detect the Hopf link. Again this is analogous to the results of Alagic et al. (2015). We also give a class of R matrices that are entangling and are weak invariants of classical knots and links yet strong invariants of virtual knots and links. We also give an example of an SU(2) representation of the three-strand braid group that models the Jones polynomial for closures of three-strand braids. This invariant is a quantum model for the Jones polynomial restricted to three-strand braids, and it does not involve quantum entanglement. These relationships between topological braiding and quantum entanglement can be used as a framework for future work in understanding the properties of entangling gates in topological quantum computing. The paper ends with a discussion of the Aravind hypothesis about the direct relationship of knots and quantum entanglement and the $$ER = EPR$$ E R = E P R hypothesis about the relationship of quantum entanglement with the connectivity of space. We describe how, given a background space and a quantum tensor network, to construct a new topological space that welds the network and the background space together. This construction embodies the principle that quantum entanglement and topological connectivity are intimately related.

DOI
10.1007/s11128-019-2191-z

Related papers

Local invariants of braiding quantum gates—associated link polynomials and entangling power

Pramod Padmanabhan, Fumihiko Sugino, Diego Trancanelli

Abstract For a generic n -qubit system, local invariants under the action of S L ( 2 , C ) ⊗ n characterize non-local properties of entanglement. In general, such properties are not immediately apparent and hard to construct. Here we consider two-qubit Yang–Baxter operators and show that their eigenvalues completely determine the non-local properties of the system. Moreover, we apply the Turaev procedure to these operators and obtain their associated link/knot polynomials. We also compute their entangling power and compare it with that of a generic two-qubit operator.

arXiv:2010.00270•Journal of Physics A Mathematical and Theoretical•Jan 26, 2021•8 citations

Entanglement and the topology of tensor networks

Louis Hirsch Kauffman

Given a background space and a quantum tensor network, we de- scribe how to construct a new topological space, that welds the network and the background space together. This construction embodies the principle that quantum entanglement and topological connectivity are intimately related.

•Apr 9, 2021•0 citations

ER=EPR, Entanglement Topology and Tensor Networks

Louis Hirsch Kauffman

This paper discusses ER = EPR, the hypothesis of Susskind and Maldacena that entangled black holes are connected by an Einstein-Rosen bridge, and that more generally, quantum entanglement is accompanied by topological connectivity. Given a background space and a quantum tensor network, we describe how to construct a new topological space, that welds the network and the background space together. This construction embodies the principle that quantum entanglement and topological connectivity are intimately related.

arXiv:2203.09797•Mar 18, 2022•1 citation

Quantum entanglement, supersymmetry, and the generalized Yang-Baxter equation

Pramod Padmanabhan, Fumihiko Sugino, Diego Trancanelli

Entangled states, such as the Bell and GHZ states, are generated from separable states using matrices known to satisfy the Yang-Baxter equation and its generalization. This remarkable fact hints at the possibility of using braiding operators as quantum entanglers, and is part of a larger speculated connection between topological and quantum entanglement. We push the analysis of this connection forward, by showing that supersymmetry algebras can be used to construct large families of solutions of the spectral parameter-dependent generalized Yang-Baxter equation. We present a number of explicit examples and outline a general algorithm for arbitrary numbers of qubits. The operators we obtain produce, in turn, all the entangled states in a multi-qubit system classified by the Stochastic Local Operations and Classical Communication protocol introduced in quantum information theory.

Quantum Information and Computation•Feb 1, 2020•9 citations

Topological Entanglement Entropy and Braids in Chern-Simons Theory

Hai Siong Tan

We explore a web of connections between quantum entanglement and knot theory by examining how topological entanglement entropy probes the braiding data of quasi-particles in Chern-Simons theory, mainly using $SU(2)$ gauge group as our working example. The problem of determining the Renyi entropy is mapped to computing the expectation value of an auxiliary Wilson loop in $S^3$ for each braid. We study various properties of this auxiliary Wilson loop for some 2-strand and 3-strand braids, and demonstrate how they reflect some geometrical properties of the underlying braids.

arXiv:1707.06629•Jul 20, 2017•0 citations

Jones Polynomial from Quantum R-Matrices: Unifying Knot Theory and Topological Quantum Computation — E8 Intelligence Research

Andrew Stewart Caldin

FINDING: The Jones polynomial is a knot invariant constructible from quantum R-matrices (braid group representations), and its evaluation at roots of unity yields the computational resource for topological quantum computation — the same algebraic structure underlies both knot theory and TQFT. | MATH: Jones polynomial V_K(t) ∈ ℤ[t^{±1/2}]; skein relation: t⁻¹V(L₊) − tV(L₋) = (t^{1/2} − t^{−1/2})V(L₀). Braid group representation: ρ: B_n → GL(V^⊗n) via R-matrix satisfying Yang-Baxter equation (R⊗I)(I⊗R)(R⊗I) = (I⊗R)(R⊗I)(I⊗R). At t = e^{2πi/k}, the representation factors through Temperley-Lieb algebra TL_n(q) with q + q⁻¹ = −(t^{1/2} + t^{−1/2}). Quantum dimension d = −(q + q⁻¹) = [2]_q. Modular tensor category (MTC) data: fusion rules N_{ij}^k, S-matrix, T-matrix (topological spin), satisfying (ST)³ = e^{2πic/8}·S² (modularity). | CONNECTION: Root-of-unity evaluation t = e^{2πi/k} connects to: (1) quantum group U_q(sl₂) at q = e^{iπ/k} — deformation parameter is a root of unity, truncati Author: Andrew Stewart Caldin, Independent Researcher, UK. Part of the E8 Intelligence Research series. Platform: e8intelligence.com

•Oct 29, 2026•0 citations
Kauffman and Lomonaco (New J Phys 4:73.1–73.18, 2002. arXiv:quant-ph/0401090 , New J Phys 6:134.1–134.40, 2004) explored the idea of understanding quantum entanglement (the non-local correlation of certain properties of particles) topologically by viewing unitary entangling operators as braiding operators. In Alagic et al. (Yang–Baxter operators need quantum entanglement to distinguish knots, 2015. arXiv:1507.05979v1 ), it is shown that entanglement is a necessary condition for forming non-trivial invariants of knots from braid closures via solutions to the Yang–Baxter equation. We show that the arguments used by Alagic et al. (2015) generalize to essentially the same results for quantum invariant state summation models of knots. In one case (the unoriented swap case) we give an example of a Yang–Baxter operator, and associated quantum invariant, that can detect the Hopf link. Again this is analogous to the results of Alagic et al. (2015). We also give a class of R matrices that are entangling and are weak invariants of classical knots and links yet strong invariants of virtual knots and links. We also give an example of an SU(2) representation of the three-strand braid group that models the Jones polynomial for closures of three-strand braids. This invariant is a quantum model for the Jones polynomial restricted to three-strand braids, and it does not involve quantum entanglement. These relationships between topological braiding and quantum entanglement can be used as a framework for future work in understanding the properties of entangling gates in topological quantum computing. The paper ends with a discussion of the Aravind hypothesis about the direct relationship of knots and quantum entanglement and the ER=EPRER = EPRER=EPR E R = E P R hypothesis about the relationship of quantum entanglement with the connectivity of space. We describe how, given a background space and a quantum tensor network, to construct a new topological space that welds the network and the background space together. This construction embodies the principle that quantum entanglement and topological connectivity are intimately related.
Abstract For a generic n -qubit system, local invariants under the action of S L ( 2 , C ) ⊗ n characterize non-local properties of entanglement. In general, such properties are not immediately apparent and hard to construct. Here we consider two-qubit Yang–Baxter operators and show that their eigenvalues completely determine the non-local properties of the system. Moreover, we apply the Turaev procedure to these operators and obtain their associated link/knot polynomials. We also compute their entangling power and compare it with that of a generic two-qubit operator.
This paper discusses ER = EPR, the hypothesis of Susskind and Maldacena that entangled black holes are connected by an Einstein-Rosen bridge, and that more generally, quantum entanglement is accompanied by topological connectivity. Given a background space and a quantum tensor network, we describe how to construct a new topological space, that welds the network and the background space together. This construction embodies the principle that quantum entanglement and topological connectivity are intimately related.
Entangled states, such as the Bell and GHZ states, are generated from separable states using matrices known to satisfy the Yang-Baxter equation and its generalization. This remarkable fact hints at the possibility of using braiding operators as quantum entanglers, and is part of a larger speculated connection between topological and quantum entanglement. We push the analysis of this connection forward, by showing that supersymmetry algebras can be used to construct large families of solutions of the spectral parameter-dependent generalized Yang-Baxter equation. We present a number of explicit examples and outline a general algorithm for arbitrary numbers of qubits. The operators we obtain produce, in turn, all the entangled states in a multi-qubit system classified by the Stochastic Local Operations and Classical Communication protocol introduced in quantum information theory.
We explore a web of connections between quantum entanglement and knot theory by examining how topological entanglement entropy probes the braiding data of quasi-particles in Chern-Simons theory, mainly using SU(2)SU(2)SU(2) gauge group as our working example. The problem of determining the Renyi entropy is mapped to computing the expectation value of an auxiliary Wilson loop in S3S^3S3 for each braid. We study various properties of this auxiliary Wilson loop for some 2-strand and 3-strand braids, and demonstrate how they reflect some geometrical properties of the underlying braids.
FINDING: The Jones polynomial is a knot invariant constructible from quantum R-matrices (braid group representations), and its evaluation at roots of unity yields the computational resource for topological quantum computation — the same algebraic structure underlies both knot theory and TQFT. | MATH: Jones polynomial V_K(t) ∈ ℤ[t^{±1/2}]; skein relation: t⁻¹V(L₊) − tV(L₋) = (t^{1/2} − t^{−1/2})V(L₀). Braid group representation: ρ: B_n → GL(V^⊗n) via R-matrix satisfying Yang-Baxter equation (R⊗I)(I⊗R)(R⊗I) = (I⊗R)(R⊗I)(I⊗R). At t = e^{2πi/k}, the representation factors through Temperley-Lieb algebra TL_n(q) with q + q⁻¹ = −(t^{1/2} + t^{−1/2}). Quantum dimension d = −(q + q⁻¹) = [2]_q. Modular tensor category (MTC) data: fusion rules N_{ij}^k, S-matrix, T-matrix (topological spin), satisfying (ST)³ = e^{2πic/8}·S² (modularity). | CONNECTION: Root-of-unity evaluation t = e^{2πi/k} connects to: (1) quantum group U_q(sl₂) at q = e^{iπ/k} — deformation parameter is a root of unity, truncati Author: Andrew Stewart Caldin, Independent Researcher, UK. Part of the E8 Intelligence Research series. Platform: e8intelligence.com