Entanglement and quantum phase transition in topological insulators

被引：1
|
作者：
Kovela, Anvesh Raja [1 ]
Verma, Anant Vijay [1 ]
Panigrahi, Prasanta K. [1 ]
Chauhan, Bhavesh [2 ]
机构：
[1] IISER Kolkata, Dept Phys Sci, Mohanpur 741246, W Bengal, India
[2] Phys Res Lab, Ahmadabad 380009, Gujarat, India
来源：
MODERN PHYSICS LETTERS B | 2019年 / 33卷 / 32期
关键词：
Topological insulator; quantum phase transition;
D O I：
10.1142/S0217984919503949
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
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.
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页数：9
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