Bath-Induced Collective Phenomena on Superconducting Qubits : Synchronization, Subradiance, and Entanglement Generation

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Cattaneo , M , Giorgi , G L , Maniscalco , S , Paraoanu , G S & Zambrini , R 2021 , ' Bath-Induced Collective Phenomena on Superconducting Qubits : Synchronization, Subradiance, and Entanglement Generation ' , Annalen der Physik , vol. 533 , no. 5 , 2100038 . https://doi.org/10.1002/andp.202100038

Title: Bath-Induced Collective Phenomena on Superconducting Qubits : Synchronization, Subradiance, and Entanglement Generation
Author: Cattaneo, Marco; Giorgi, Gian Luca; Maniscalco, Sabrina; Paraoanu, Gheorghe Sorin; Zambrini, Roberta
Other contributor: University of Helsinki, Particle Physics and Astrophysics
University of Helsinki, Mind and Matter


Date: 2021-05
Language: eng
Number of pages: 18
Belongs to series: Annalen der Physik
ISSN: 0003-3804
DOI: https://doi.org/10.1002/andp.202100038
URI: http://hdl.handle.net/10138/330160
Abstract: A common environment acting on a pair of qubits gives rise to a plethora of different phenomena, such as the generation of qubit-qubit entanglement, quantum synchronization, and subradiance. Here, time-independent figures of merit for entanglement generation, quantum synchronization, and subradiance are defined, and an extensive analytical and numerical study of their dependence on model parameters is performed. A recently proposed measure of the collectiveness of the dynamics driven by the bath is also addressed, and it is found that it almost perfectly witnesses the behavior of entanglement generation. The results show that synchronization and subradiance can be employed as reliable local signatures of an entangling common-bath in a general scenario. Finally, an experimental implementation of the model based on two transmon qubits capacitively coupled to a common resistor is proposed, which provides a versatile quantum simulation platform of the open system in any regime.
Subject: collective phenomena
common bath
open quantum systems
superconducting qubits
QUANTUM ERROR-CORRECTION
DYNAMICS
SYSTEMS
DECAY
114 Physical sciences
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