Charge qubit in van der Waals heterostructures

@article{Lucatto2019ChargeQI,
  title={Charge qubit in van der Waals heterostructures},
  author={B. Lucatto and Daniel S. Koda and F. Bechstedt and M. Marques and L. K. Teles},
  journal={Physical Review B},
  year={2019},
  volume={100},
  pages={121406}
}
The use of spatial quantum superpositions of electron states in a gated vdW heterostructure as a charge qubit is presented. We theoretically demonstrate the concept for the ZrSe$_2$/SnSe$_2$ vdW heterostructure using rigorous ab initio calculations. In the proposed scheme, the quantum state is prepared by applying a vertical electric field, is manipulated by short field pulses, and is measured via electric currents. The qubit is robust, operational at high temperature, and compatible with the… Expand

Figures from this paper

CMOS Position-Based Charge Qubits: Theoretical Analysis of Control and Entanglement
TLDR
It is shown that charge qubits can be entangled through electrostatic interaction and all required formulae to calculate the maximally localized functions and the entries of the Hamiltonian matrix in the presence of interaction between qubits are provided. Expand
Noisy Intermediate Scale Quantum Computers: on the Co-Simulation of Qubits and Control Electronics
TLDR
The challenges in modeling of Noisy Intermediate Scale Quantum Computers, in particular, those implementations that rely on integrated interface and control electronics and qubit modeling and existing solutions are discussed. Expand
Control of the orbital character of indirect excitons in MoS2/WS2 heterobilayers
Valley selective hybridization and residual coupling of electronic states in commensurate van der Waals heterobilayers enable the control of the orbital character of interlayer excitons. WeExpand
A re-evaluation of diffraction from Si(111) 7 × 7: decoding the encoded phase information in the 7 × 7 diffraction pattern.
  • J. Demuth
  • Medicine
  • Physical chemistry chemical physics : PCCP
  • 2021
TLDR
The Patterson map of the 7 × 7 surface provide insight into the lost phase information encoded in diffraction and reveal why the DAS structure was experimentally favored. Expand
Disclosed: Quasiparticle properties and dynamics in real and momentum space
Disclosed: quasiparticle properties and dynamics in real and momentum spaceUrsula Wurstbauer
Comparing concepts of quantum and classical neural network models for image classification task
While quantum architectures are still under development, when available, they will only be able to process quantum data when machine learning algorithms can only process numerical data. Therefore, inExpand
Light-matter interaction in van der Waals heterostructures.
Even if individual two-dimensional materials own various interesting and unexpected properties, the stacking of such layers leads to van der Waals solids which unite the characteristics of twoExpand

References

SHOWING 1-10 OF 34 REFERENCES
Valley qubit in a gated MoS2 monolayer quantum dot
The aim of presented research is to design a nanodevice, based on a MoS$_2$ monolayer, performing operations on a well-defined valley qubit. We show how to confine an electron in a gate inducedExpand
Coherent control of a hybrid superconducting circuit made with graphene-based van der Waals heterostructures
TLDR
These results represent a new approach to studying van der Waals materials using microwave photons in coherent quantum circuits and show that this device can be operated as a voltage-tunable transmon qubit that can be controlled coherently. Expand
Charge-qubit operation of an isolated double quantum dot.
We have investigated coherent time evolution of pseudomolecular states of an isolated (leadless) silicon double quantum dot, where operations are carried out via capacitively coupled elements.Expand
Coherent manipulation of electronic States in a double quantum dot.
TLDR
It is shown that coherent time evolution of charge states (pseudospin qubit) in a semiconductor double quantum dot is investigated with a high-speed voltage pulse that controls the energy and decoherence of the system. Expand
A dressed spin qubit in silicon.
TLDR
The properties of the dressed, donor-bound electron spin in silicon are investigated, and its potential as a quantum bit in scalable architectures is assessed. Expand
Quantum computing with defects
The successful development of quantum computers is dependent on identifying quantum systems to function as qubits. Paramagnetic states of point defects in semiconductors or insulators have been shownExpand
CUBIT: Capacitive qUantum BIT
In this letter, it is proposed that cryogenic quantum bits can operate based on the nonlinearity due to the quantum capacitance of two-dimensional Dirac materials, and in particular graphene. TheExpand
Van der Waals heterostructures
TLDR
With steady improvement in fabrication techniques and using graphene’s springboard, van der Waals heterostructures should develop into a large field of their own. Expand
Quantum computation with ultracold atoms in a driven optical lattice
We propose a scheme for quantum computation in optical lattices. The qubits are encoded in the spacial wavefunction of the atoms such that spin decoherence does not influence the computation. QuantumExpand
Nonlinear graphene quantum capacitors for electro-optics
Owing to its peculiar energy dispersion, the quantum capacitance property of graphene can be exploited in a two-dimensional layered capacitor configuration. Using graphene and boron nitride,Expand
...
1
2
3
4
...