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Efficient steady-state-entanglement generation in strongly driven coupled qubits
(American Physical Society, 2021-09)
We report on a mechanism to optimize the generation of steady-state entanglement in a system of coupled qubits driven by microwave fields. Due to the interplay between Landau-Zener-Stückelberg-Majorana pumping involving ...
Generalized conditional entropy optimization for qudit-qubit states
(American Physical Society, 2014-10)
We derive a general approximate solution to the problem of minimizing the conditional entropy of a qudit-qubit system resulting from a local measurement on the qubit, which is valid for general entropic forms and becomes ...
Dynamic transition in Landau-Zener-Stückelberg interferometry of dissipative systems: the case of the flux qubit
(American Physical Society, 2016-02)
We study Landau-Zener-Stückelberg (LZS) interferometry in multilevel systems coupled to an Ohmic quantum bath. We consider the case of superconducting flux qubits driven by a dc+ac magnetic fields, but our results can apply ...
Quantum control of a model qubit based on a multi-layered quantum dot
(American Institute of Physics, 2013-04)
In this work we present a model qubit whose basis states are eigenstates of a multilayered quantum dot. We show that the proper design of the quantum dot results in qubit states that have excellent dynamical properties ...
Revealing the system-bath coupling via Landau-Zener-Stückelberg interferometry in superconducting qubits
(American Physical Society, 2019-08)
In this work we propose a way to unveil the type of environmental noise in strongly driven superconducting flux qubits through the analysis of the Landau-Zener-Stückelberg (LZS) interferometry. We study both the two-level ...
Amplitude tuning of steady-state entanglement in strongly driven coupled qubits
(American Physical Society, 2018-10)
We report a mechanism to generate dissipative steady-state entanglement in coupled solid-state qubits driven by strong periodic fields. We demonstrate that steady entanglement can be induced and tuned by changing the ...
Weak localization and conductance fluctuations-like effects in Qubits driven by biharmonic signals
(IOP Publishing, 2014-12)
We investigate the effect of broken time reversal symmetry in flux qubits driven by a biharmonic magnetic flux signal with a phase lag. In the regime of large relaxation times, we explicitly compute the transition rate ...
Quantum Emulation of Coherent Backscattering in a System of Superconducting Qubits
(American Physical Society, 2020-07)
In condensed matter systems, coherent backscattering and quantum interference in the presence of time-reversal symmetry lead to well-known phenomena, such as weak localization (WL) and universal conductance fluctuations ...
Mesoscopic fluctuations in biharmonically driven flux qubits
(American Physical Society, 2017-01-15)
We investigate flux qubits driven by a biharmonic magnetic signal, with a phase lag that acts as an effective time reversal broken parameter. The driving induced transition rate between the ground and the excited state of ...