21 papers · ranked by Valyu relevance
Hao Zheng, Junyi Zhang, Richard Berndt
Double quantum dots (DQDs) are a versatile platform for solid-state physics, quantum computation and nanotechnology. The micro-fabrication techniques commonly used to fabricate DQDs are difficult to extend to the atomic scale. Using an alternative approach, which relies on scanning tunneling microscopy and…
E. Wach, B. Szafran
We propose a spin-sensitive scanning probe microscopy experiment on double quantum dots in Pauli blockade conditions. Electric spin resonance is induced by an AC voltage applied to the scanning gate which induces lifting of the Pauli blockade of the current. The stationary Hamiltonian eigenstates are used as a basis…
N. S. Maslova, P. I. Arseyev, V. N. Mantsevich
We have analyzed theoretically quenched dynamics of correlated double quantum dot (DQD) due to the switching “on” and “off” coupling to reservoirs. The possibility for controllable manipulation of charge and spin states in the double quantum dot was revealed and discussed. The proposed experimental scheme allows to…
Abdessamie Chhieb, Mostafa Mansour, Mohamed Ouchrif
Our work explore the time evolution of entanglement, local quantum uncertainty, and correlated coherence, within a system modeled by two double quantum dots. The dynamics is represented using a time-fractional Schrödinger equation, which includes memory effects in a non-Markovian regime. We vary the fractional…
Masakazu Kondo, Shusuke Miyota, Wataru Izumida, S. Amaha + 1 more
We investigate the influence of thermal energy on the current flow and electron spin states in double quantum dots in series. The quadruplet Pauli spin blockade, which is caused by the quadruplet and doublet states, occurs at low temperatures affecting the transport properties. As the temperature increases, the…
Xinyu Zhao, Xuedong Hu
With silicon being the go-to material for spin qubits, and motivated by the demand of a scalable quantum computer architecture for fast and reliable quantum information transfer on-chip, we study coherent electron transport in a silicon double quantum dot. We first examine the valley-orbital dynamics in a silicon…
A. C. Betz, R. Wacquez, M. Vinet, X. Jehl + 4 more
'M. Sanquer' 'A. J. Ferguson' 'M. Fernando González-Zalba'] We report the dispersive readout of the spin state of a double quantum dot formed at the corner states of a silicon nanowire field-effect transistor. Two face-to-face top-gate electrodes allow us to independently tune the charge occupation of the quantum dot…
Jason Phoenix, Marek Korkusinski, Dan Dalacu, Philip J. Poole + 5 more
'Piotr Zawadzki' 'Sergei Studenikin' 'Robin L. Williams' 'Andrew S. Sachrajda' 'Louis Gaudreau'] We study experimentally and theoretically the in-plane magnetic field dependence of the coupling between dots forming a vertically stacked double dot molecule. The InAsP molecule is grown epitaxially in an InP nanowire and…
Hai-Ou Li, Gang Cao, Ming Xiao, Jie You + 5 more
'Guang‐Can Guo' 'Hong-Wen Jiang' 'Guo‐Ping Guo'] 1Key Laboratory of Quantum Information, CAS, University of Science and Technology of China, Hefei, Anhui 230026, China 2 Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China 3…
H. Potts, I.–J. Chen, A. Tsintzis, M. Nilsson + 4 more
'K. A. Dick' 'M. Leijnse' 'C. Thelander'] Emerging theoretical concepts for quantum technologies have driven a continuous search for structures where a quantum state, such as spin, can be manipulated efficiently. Central to many concepts is the ability to control a system by electric and magnetic fields, relying on…
Constantine Yannouleas, Uzi Landman
A study of the influence of strong electron-electron interactions and Wigner-molecule (WM) formation on the spectra of 2e singlet-triplet double-dot Si qubits is presented based on a full configuration interaction (FCI) approach that incorporates the valley degree of freedom (VDOF) in the context of the continuous…
Martin Raith, Peter Stano, Jaroslav Fabian
Highly accurate numerical results of phonon-induced two-electron spin relaxation in silicon double quantum dots are presented. The relaxation, enabled by spin-orbit coupling and the nuclei of 29Si (natural or purified abundance), are investigated for experimentally relevant parameters, the interdot coupling, the…
Koichi Baba, Kosuke Noro, Yusuke Kozuka, Takeshi Kumasaka + 3 more
'Motoya Shinozaki' 'Masashi Kawasaki' 'Tomohiro Otsuka'] In recent years, advancements in semiconductor manufacturing technology have enabled the formation of high-quality, high-mobility two-dimensional electron gases in zinc oxide (ZnO) heterostructures, making the electrostatic formation of quantum dots possible.…
Heedae Kim, Kwangseuk Kyhm, Robert A. Taylor, Jong Su Kim + 2 more
'Jin Dong Song' 'Sungkyun Park'] We find that the emission from laterally coupled quantum dots is strongly polarized along the coupled direction [1 $\bar 1$0], and its polarization anisotropy can be shaped by changing the orientation of the polarized excitation. When the nonresonant excitation is linearly polarized…
Doina Bejan, Cristina Stan, Yia-Chung Chang
We investigate the energy spectra and optical absorption of a 3D quantum dot-double quantum ring structure of GaAs/Al0.3Ga0.7As with adjustable geometrical parameters. In the effective mass approximation, we perform 3D numerical computations using as height profile a superposition of three Gaussian functions.…
Jino Heo, Chang-Ho Hong, Min-Sung Kang, Hyeon Yang + 3 more
'Jong-Phil Hong' 'Seong-Gon Choi'] We propose a controlled quantum teleportation scheme to teleport an unknown state based on the interactions between flying photons and quantum dots (QDs) confined within single- and double-sided cavities. In our scheme, users (Alice and Bob) can teleport the unknown state through a…
Corneile Minnaar, Bruce Anderson
To understand the evolution of flowers and mating systems in animal-pollinated plants, we have to directly address the function for which flowers evolved—the movement of pollen from anthers to stigmas. However, despite a long history of making significant advances in our understanding natural selection and evolution…
Shuyan Zhang, Joseph Yong Xin Cheng, Jian Jun Chua, Malini Olivo
The optical properties of quantum dots were extensively characterized using a hyperspectral fluorescence microscopy system. The system provides a single excitation wavelength in the ultraviolet and 311 emission wavelength channels in the visible. This allows detection of multiple fluorophores (e.g. different quantum…
Authors not listed
We outline two general theoretical techniques to simulate polariton quantum dynamics and optical spectra under the collective coupling regimes described by a Holestein-Tavis-Cummings (HTC) model Hamiltonian. The first one takes the advantage of sparsity of the HTC Hamiltonian, which allows one to reduce the cost of…
Thomas Bathe, Chuan-Ding Dong, Stefan Schumacher
Double doping, in which a single dopant molecule induces two charge carriers in an organic semiconductor (OSC), was recently experimentally observed and promises to enhance the efficiency of molecular doping. Here we present a theoretical investigation of p-type molecular double doping in a…
Authors not listed
In our previous work [Ref.~\citenum{MondalJCP2024paper1}], we developed several efficient strategies to simulate exciton-polariton dynamics described by the Holestein-Tavis-Cummings (HTC) Hamiltonian under the collective coupling regime. Here, we incorporated these strategies into the previously developed…