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The Quantum States of a Graph

open access: yesMathematics, 2023
Quantum codes are crucial building blocks of quantum computers. With a self-dual quantum code is attached, canonically, a unique stabilised quantum state. Improving on a previous publication, we show how to determine the coefficients on the basis of kets
Mohd Arif Raza   +8 more
doaj   +3 more sources

Preparation of Quantum Superposition Using Partial Negation

open access: yesIEEE Access, 2022
The preparation of a quantum superposition is the key to the success of many quantum algorithms and quantum machine learning techniques. The preparation of an incomplete or a non-uniform quantum superposition with certain properties is a non-trivial task.
Sara Anwer   +3 more
doaj   +1 more source

Possibilities of Controlling the Quantum States of Hole Qubits in an Ultrathin Germanium Layer Using a Magnetic Substrate: Results from ab Initio Calculations

open access: yesNanomaterials, 2023
Using density functional theory in the noncollinear approximation, the behavior of quantum states of hole qubits in a Ge/Co:ZnO system was studied in this work.
Andrey N. Chibisov   +5 more
doaj   +1 more source

A p-Adic Model of Quantum States and the p-Adic Qubit

open access: yesEntropy, 2022
We propose a model of a quantum N-dimensional system (quNit) based on a quadratic extension of the non-Archimedean field of p-adic numbers. As in the standard complex setting, states and observables of a p-adic quantum system are implemented by suitable ...
Paolo Aniello   +2 more
doaj   +1 more source

An Intensional Probability Theory: Investigating the Link between Classical and Quantum Probabilities

open access: yesMathematics, 2022
The link between classical and quantum theories is discussed in terms of extensional and intensional viewpoints. The paper aims to bring evidence that classical and quantum probabilities are related by intensionalization, which means that by abandoning ...
Miloš Milovanović, Nicoletta Saulig
doaj   +1 more source

Nonadiabatic quantum state engineering by time-dependent decoherence-free subspaces in open quantum systems

open access: yesNew Journal of Physics, 2021
We extend the theory of quantum state engineering (QSE) to the open quantum systems which simultaneously suffer time-dependent decoherence and time-independent decoherence.
Qi-Cheng Wu   +4 more
doaj   +1 more source

Atom-optically synthetic gauge fields for a noninteracting Bose gas

open access: yesLight: Science & Applications, 2022
A two-leg ladder with tunable gauge fields is achieved by one-dimensional synthetic momentum-state lattice of a noninteracting Bose gas.
Yuqing Li   +9 more
doaj   +1 more source

The Operational Choi–Jamiołkowski Isomorphism

open access: yesEntropy, 2020
In this article, I use an operational formulation of the Choi–Jamiołkowski isomorphism to explore an approach to quantum mechanics in which the state is not the fundamental object.
Emily Adlam
doaj   +1 more source

High-performance cavity-enhanced quantum memory with warm atomic cell

open access: yesNature Communications, 2022
Quantum memories usually suffer from a trade-off between efficiency and excess noise. Here, by exploiting the time-reversal approach for improving modes matching, the authors show a warm-atomic-cell-based cavity-enhanced memory with 67% efficiency and ...
Lixia Ma   +8 more
doaj   +1 more source

On the determination of pure quantum states by the homodyne detection

open access: yesVestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2016
The methods of reconstruction of the wave function of a pure state of a quantum system by quadrature distribution measured experimentally by the homodyne detection are considered.
Andrey I Dnestryan
doaj   +1 more source

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