Zobrazeno 1 - 10
of 30
pro vyhledávání: '"Buterakos, Donovan"'
Autor:
Zwolak, Justyna P., Taylor, Jacob M., Andrews, Reed, Benson, Jared, Bryant, Garnett, Buterakos, Donovan, Chatterjee, Anasua, Sarma, Sankar Das, Eriksson, Mark A., Greplová, Eliška, Gullans, Michael J., Hader, Fabian, Kovach, Tyler J., Mundada, Pranav S., Ramsey, Mick, Rasmussen, Torbjoern, Severin, Brandon, Sigillito, Anthony, Undseth, Brennan, Weber, Brian
Gate-defined quantum dots are a promising candidate system to realize scalable, coupled qubit systems and serve as a fundamental building block for quantum computers. However, present-day quantum dot devices suffer from imperfections that must be acc
Externí odkaz:
http://arxiv.org/abs/2312.14322
Autor:
Buterakos, Donovan, Sarma, Sankar Das
Publikováno v:
Phys. Rev. B 108, 235301, (2023)
It has been demonstrated that small plaquettes of quantum dot spin qubits are capable of simulating condensed matter phenomena which arise from the Hubbard model, such as the collective Coulomb blockade and Nagaoka ferromagnetism. Motivated by recent
Externí odkaz:
http://arxiv.org/abs/2308.04504
Certain exact many-body results for Hubbard model ground states testable in small quantum dot arrays
Autor:
Buterakos, Donovan, Sarma, Sankar Das
Publikováno v:
Phys. Rev. B 107, 014403 (2023)
We present several interesting phenomena related to flatband ferromagnetism in the Hubbard model. The first is a mathematical theorem stating certain conditions under which a flatband ferromagnetic must necessarily be degenerate with a nonferromagnet
Externí odkaz:
http://arxiv.org/abs/2202.11115
Autor:
Buterakos, Donovan, Sarma, Sankar Das
Publikováno v:
PRX Quantum 2, 040358 (2021)
The presence of valley states is a significant obstacle to realizing quantum information technologies in Silicon quantum dots, as leakage into alternate valley states can introduce errors into the computation. We use a perturbative analytical approac
Externí odkaz:
http://arxiv.org/abs/2106.01391
Publikováno v:
Phys. Rev. B 103, 205154 (2021)
We theoretically consider Fermi surface anomalies manifesting in the temperature dependent quasiparticle properties of two-dimensional (2D) interacting electron systems, comparing and contrasting with the corresponding 3D Fermi liquid situation. In p
Externí odkaz:
http://arxiv.org/abs/2101.07815
Autor:
Buterakos, Donovan, Sarma, Sankar Das
Publikováno v:
Phys. Rev. B 103, 205402 (2021)
Charge noise remains the primary obstacle to the development of quantum information technologies with semiconductor spin qubits. We use an exact analytical calculation to determine the effects of quasistatic charge noise on a ring of three equally sp
Externí odkaz:
http://arxiv.org/abs/2012.05924
Publikováno v:
PRX Quantum 2, 010341 (2021)
The ability to perform gates in multiqubit systems that are robust to noise is of crucial importance for the advancement of quantum information technologies. However, finding control pulses that cancel noise while performing a gate is made difficult
Externí odkaz:
http://arxiv.org/abs/2008.01168
Publikováno v:
Phys. Rev. B 102, 085145 (2020)
The electron self-energy for long-range Coulomb interactions plays a crucial role in understanding the many-body physics of interacting electron systems (e.g. in metals and semiconductors), and has been studied extensively for decades. In fact, it is
Externí odkaz:
http://arxiv.org/abs/2003.09433
Autor:
Buterakos, Donovan, Sarma, Sankar Das
Publikováno v:
Phys. Rev. B 100, 235149 (2019)
We consider an electron gas, both in two (2D) and three (3D) dimensions, interacting with quenched impurities and phonons within leading order finite-temperature many body perturbation theories, calculating the electron self-energies, spectral functi
Externí odkaz:
http://arxiv.org/abs/1908.08957
Autor:
Buterakos, Donovan, Sarma, Sankar Das
Publikováno v:
Phys. Rev. B 100, 224421 (2019)
Following the recent claimed obsevation of Nagaoka ferromagnetism in finite size quantum dot plaquettes, a general theoretical analysis is warranted in order to ascertain in rather generic terms which arrangements of a small number of quantum dots ca
Externí odkaz:
http://arxiv.org/abs/1908.03226