Entanglement and quantum phase transition in topological insulators

Anant Vijay Varma; Anvesh Raja Kovela; Prasanta K. Panigrahi; Bhavesh Chouhan

doi:10.1142/S0217984919503949

Entanglement and quantum phase transition in topological insulators

Anant Vijay Varma
, Anvesh Raja Kovela
, Prasanta K. Panigrahi
, Bhavesh Chouhan

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

Presence of entangled states is explicitly shown in a topological insulator (TI) Bi2Te3. The surface and bulk state are found to have different structures of entanglement. The surface states live as maximally entangled states in a four-dimensional subspace of total Hilbert space (spin, orbital, space). However, bulk states are entangled in the whole Hilbert space. Bulk states are found to be entangled maximally by controlled injection of electrons with momentum only along the z-direction. At quantum phase transition (QPT) point, both states become maximally entangled two qubit states.

Original language	English
Article number	1950394
Journal	Modern Physics Letters B
Volume	33
Issue number	32
DOIs	https://doi.org/10.1142/S0217984919503949
State	Published - 20 Nov 2019
Externally published	Yes

Keywords

Topological insulator
quantum phase transition

ASJC Scopus subject areas

Statistical and Nonlinear Physics
Condensed Matter Physics

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10.1142/S0217984919503949

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title = "Entanglement and quantum phase transition in topological insulators",

abstract = "Presence of entangled states is explicitly shown in a topological insulator (TI) Bi2Te3. The surface and bulk state are found to have different structures of entanglement. The surface states live as maximally entangled states in a four-dimensional subspace of total Hilbert space (spin, orbital, space). However, bulk states are entangled in the whole Hilbert space. Bulk states are found to be entangled maximally by controlled injection of electrons with momentum only along the z-direction. At quantum phase transition (QPT) point, both states become maximally entangled two qubit states.",

keywords = "Topological insulator, quantum phase transition",

author = "Varma, \{Anant Vijay\} and Kovela, \{Anvesh Raja\} and Panigrahi, \{Prasanta K.\} and Bhavesh Chouhan",

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AU - Varma, Anant Vijay

AU - Kovela, Anvesh Raja

AU - Panigrahi, Prasanta K.

AU - Chouhan, Bhavesh

PY - 2019/11/20

Y1 - 2019/11/20

N2 - Presence of entangled states is explicitly shown in a topological insulator (TI) Bi2Te3. The surface and bulk state are found to have different structures of entanglement. The surface states live as maximally entangled states in a four-dimensional subspace of total Hilbert space (spin, orbital, space). However, bulk states are entangled in the whole Hilbert space. Bulk states are found to be entangled maximally by controlled injection of electrons with momentum only along the z-direction. At quantum phase transition (QPT) point, both states become maximally entangled two qubit states.

AB - Presence of entangled states is explicitly shown in a topological insulator (TI) Bi2Te3. The surface and bulk state are found to have different structures of entanglement. The surface states live as maximally entangled states in a four-dimensional subspace of total Hilbert space (spin, orbital, space). However, bulk states are entangled in the whole Hilbert space. Bulk states are found to be entangled maximally by controlled injection of electrons with momentum only along the z-direction. At quantum phase transition (QPT) point, both states become maximally entangled two qubit states.

KW - Topological insulator

KW - quantum phase transition

UR - https://www.scopus.com/pages/publications/85073877763

U2 - 10.1142/S0217984919503949

DO - 10.1142/S0217984919503949

M3 - Article

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VL - 33

JO - Modern Physics Letters B

JF - Modern Physics Letters B

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M1 - 1950394

ER -

Entanglement and quantum phase transition in topological insulators

Abstract

Keywords

ASJC Scopus subject areas

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