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Entanglement for Qubit and Qudit in Single Photoionization of Rotationally State Selected, Oriented C3v Polyatomic Molecules

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Title Entanglement for Qubit and Qudit in Single Photoionization of Rotationally State Selected, Oriented C3v Polyatomic Molecules
 
Creator Chakraborty, M
Sen, S
 
Subject Quantum entanglement
Qudit
Qubit
photoionization
Concurrence
Density matrix
Circular dichroism
 
Description 539-549
Multidimensional quantum systems (qudits), as a generalization of two-level quantum systems (qubits), can exhibit distinct
quantum properties, provide higher capacity and noise robustness in quantum communications. Qudits also offer higher
efficiency and flexibility in quantum computing. Present paper studies the bipartite entanglement betwixt a molecular photoion
(qudit) and photoelectron (qubit) produced in the photoionization from rotationally state selected, oriented polyatomic molecule
without observing spin-orbit interaction (SOI). In absence of SOI, Russell-Saunders (RS) coupling is applicable. The dimension
of ionic qudit depends on its electronic state. The degree of entanglement is quantified by the concurrence obtained from the
elements of density matrix (EDM) for photoionization. The theoretical formulation for entanglement has been developed for
photoionization of rotationally state selected, oriented C3v molecules. It is applied, as an example, to photoionization in 2
13a1
orbital of a state selected oriented CH3I in a pure JKJM J rotational state. We find that the entanglement depends significantly
on the rotational states of the molecule as well as either or both on the directions of molecular orientation, of spin quantization,
and of the incident beam along with its polarization. A significant effect on entanglement properties due to the circular
dichroism (CD) has also been observed.
 
Date 2022-06-10T06:34:05Z
2022-06-10T06:34:05Z
2022-06
 
Type Article
 
Identifier 0975-0959 (Online); 0301-1208 (Print)
http://nopr.niscpr.res.in/handle/123456789/59875
 
Language en
 
Publisher NIScPR-CSIR, India
 
Source IJPAP Vol.60(06) [June 2022]