Quantum sub-phase sensitivity of a Mach�Zehnder interferometer with the superposition of Schr�dinger's cat-like state with vacuum state as an input under product detection scheme
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Date
2024
Authors
Journal Title
Physics Open
Journal ISSN
Volume Title
Publisher
Elsevier B.V.
Abstract
We study the phase sensitivity of a Mach�Zehnder interferometer (MZI) with product detection (PD) scheme by using the superposition of Schr�dinger's cat-like state with the vacuum state (SCVS) and the coherent state as the inputs. We compare the results derived from PD with the parity detection scheme's results. We found that PD performs better than parity detection and approaches the single parameter quantum Cram�r-Rao bound in some cases. Therefore, we expect that SCVS may play as an alternative quantum resource with PD for the improvement in the phase sensitivity of an MZI having potential application in quantum metrology and quantum sensing. � 2023
Description
Keywords
Parity detection, Phase sensitivity, Product detection, Quantum metrology