Indispensability of orbital angular momentum states in secure quantum
communication tasks
- URL: http://arxiv.org/abs/2310.00304v1
- Date: Sat, 30 Sep 2023 08:23:25 GMT
- Title: Indispensability of orbital angular momentum states in secure quantum
communication tasks
- Authors: Rajni Bala and Sooryansh Asthana
- Abstract summary: Do orbital angular momentum states act merely as an alternative or do they act as an indispensable resource?
We show that the employment of orbital angular momentum states eliminates the need for entangled state measurements.
This study opens up a possibility for designing several quantum information processing tasks in which multidimensional OAM states act as an indispensable resource.
- Score: 0.0
- License: http://creativecommons.org/licenses/by-nc-nd/4.0/
- Abstract: Quantum key distribution protocols have been designed for layered networks
employing multidimensional entangled and separable orbital angular momentum
states [Phys. Rev. A 97, 032312 (2018), Int. J. Theor. Phys. 62, 104 (2023)].
This paper seeks an answer to the overarching question -- in the context of
secure quantum communication tasks, do orbital angular momentum states act
merely as an alternative or do they act as an indispensable resource? We start
by showing that the task of quantum key distribution in layered networks can
also be accomplished with several copies of lower-dimensional states such as
polarization qubits. For this reason, orbital angular momentum states do not
offer any intrinsic advantage in layered quantum key distribution. The
potential of OAM states unveils itself in the enhancement of key generation
rates and integrated quantum communication tasks, which we present in this
paper. These tasks can be implemented exclusively with high-dimensional OAM
entangled states. In fact, we show that the employment of orbital angular
momentum states eliminates the need for entangled state measurements, whose
implementation is resource-intensive. We believe that this study opens up a
possibility for designing several quantum information processing tasks in which
multidimensional OAM states act as an indispensable resource.
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