Enhanced Spin Coherence while Displacing Electron in a Two-Dimensional Array of Quantum Dots
نویسندگان
چکیده
A ten-fold boost in the coherence time of spin qubits a two-dimensional array quantum dots is achieved: The role electron displacement discussed context large-scale circuits
منابع مشابه
Electron spin coherence near room temperature in magnetic quantum dots
We report on an example of confined magnetic ions with long spin coherence near room temperature. This was achieved by confining single Mn(2+) spins in colloidal semiconductor quantum dots (QDs) and by dispersing the QDs in a proton-spin free matrix. The controlled suppression of Mn-Mn interactions and minimization of Mn-nuclear spin dipolar interactions result in unprecedentedly long phase mem...
متن کاملMagnetoresistance in two-dimensional array of Ge/Si quantum dots
Magnetoresistance in two-dimensional array of Ge/Si was studied for a wide range of the conductance, where the transport regime changes from hopping to diffusive one. The behavior of magnetoresistance is similar for all samples; it is negative in weak fields and becomes positive with increasing of magnetic field. Negative magnetoresistance can be described in the frame of weak localization appr...
متن کاملCoherence and Spin in GaAs Quantum Dots
This thesis describes a number of experiments performed in quantum dots as well as 2D systems fabricated in GaAs/AlGaAs 2D electron gases. The focus of the studies is set on spin, coherence and interaction effects of electrons in mesoscopic structures. Experiments investigating the rich physics of spin-orbit coupling in confined structures in presence of magnetic fields both perpendicular and p...
متن کاملElectron Spin-Phonon Relaxation in Quantum Dots
We calculate the spin relaxation rates in parabolic quantum dots due to the phonon modulation of the spin-orbit interaction in presence of an external magnetic field. Both, deformation potential (DP) and piezoelectric (PE) electron-phonon couplings are included in the Pavlov-Firsov spin-phonon Hamiltonian. We demonstrate that the spin relaxation rates are particularly sensitive with the Landé g...
متن کاملScaling of entanglement at a quantum phase transition for a two-dimensional array of quantum dots
Using the Hubbard model, the entanglement scaling behavior in a two-dimensional itinerant system is investigated. It has been found that, on the two sides of the critical point denoting an inherent quantum phase transition (QPT), the entanglement follows different scalings with the size, just as an order parameter does. This fact reveals the subtle role played by the entanglement in QPT as a fu...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: PRX quantum
سال: 2021
ISSN: ['2691-3399']
DOI: https://doi.org/10.1103/prxquantum.2.030331