Quantum Information Processing

We demonstrate theoretically the Fano resonance and the conversion from fast to slow light in a hybrid quantum dot (QD)–semiconductor/superconductor (S/S) ring device, where the QD is coupled to a pair of Majorana fermions (MFs) appearing in the ...

Quantum machine learning has the potential to overcome problems that current classical machine learning algorithms face, such as large data requirements or long learning times. Sampling is one of the aspects of classical machine learning that ...

The problem of learning Boolean linear functions from quantum examples w.r.t. the uniform distribution can be solved on a quantum computer using the Bernstein–Vazirani algorithm (Bernstein and Vazirani, in: Kosaraju (ed) Proceedings of the twenty-...$$$\mathcal{}$$$$$

A simple proof of security of the BB84 protocol is presented in this paper. The proof is achieved in an information-theoretic way without referring to the formalism of quantum error-correction codes. Two examples are presented and discussed, ...

Quantum feedback control (QFBC) and quantum feedforward control (QFFC) are two major techniques for protecting quantum states against decoherence. Based on this, Guo et al. proposed a scheme by combining the QFFC and the minimum-error ...

Refining recent results, we propose an upper bound for the norms of Bloch Vectors for heterogeneous quantum systems containing an arbitrary number of qudits with possibly different numbers of levels. We also generalize recent approaches for ...

The Poisson equation has applications across many areas of physics and engineering, such as the dynamic process simulation of ocean current. Here we present a quantum algorithm for solving Poisson equation, as well as a complete and modular ...

Mutually unbiased bases plays a central role in quantum mechanics and quantum information processing. As an important class of mutually unbiased bases, mutually unbiased maximally entangled bases (MUMEBs) in bipartite systems have attracted much ...${\mathbb{}}^{{\mathrm{}}^{}}{\mathbb{}}^{{\mathrm{}}^{}}$${\mathbb{}}^{{\mathrm{}}^{}}{\mathbb{}}^{{\mathrm{}}^{}}$${\mathrm{}}^{}{\mathrm{}}^{}\mathrm{}{\mathrm{}}^{}\mathrm{}$${\mathrm{}}^{}{\mathrm{}}^{}$

We investigated the dynamics of quantum Fisher information for a two-level system controlled by a non-Hermitian operation under the depolarization, and the non-Hermitian operation is described by a special Hamiltonian in which both the $\mathcal{PT}$-...$\mathcal{}$

Blockchain technology is facing critical issues of scalability, efficiency and sustainability. These problems are necessary to solve if blockchain is to become a technology that can be used responsibly. Useful quantum computers could potentially ...

In typical well-known cryptosystem, the hardness of classical problems plays a fundamental role in ensuring its security. While, with the booming of quantum computation, some classical hard problems tend to be vulnerable when confronted with the ...

In this paper, we propose two semi-quantum private comparison (SQPC) protocols based on Bell states. With the help of a semi-honest quantum third party (TP), two classical users can compare the equality of their secrets without leaking them. That TP ...

We have studied the standard quantum teleportation of an arbitrary single qubit state for the situation in which a two-qubit X-state as a resource successively passes through correlated quantum channels, including amplitude-damping, phase-damping, ...${}^{}$

We investigate quantum-phase transitions (QPT) in the Ising transverse field model, the XY-Heisenberg model with staggered Dzyaloshinskii–Moriya (DM) interaction, and the bond alternating Ising model with DM interaction, on a one-dimensional ...${}_{\mathrm{}}$

Quantum median filtering is an important step for many quantum signal processing algorithms. Current quantum median filtering designs show limitations in either computational complexity or incomplete noise detection. We propose a design of quantum ...$\left(\mathrm{}{}^{\mathrm{}}\mathrm{}\right)$$\left(\mathrm{}{}^{\mathrm{}}\mathrm{}\right)$$\left(\mathrm{}{}^{\mathrm{}}\mathrm{}{}^{\mathrm{}}\right)$${\mathrm{}}^{}{\mathrm{}}^{}$

We propose a scheme to construct a controlled phase gate on two distant nitrogen-vacancy centers (NV-centers) assisted by a quantized nanomechanical cantilevel resonator (NAMR). Unlike the previous work to complete the gate in the dispersive ...$\mathrm{}$

Clustering algorithms are used to classify the unlabeled data into a number of categories with polynomial time complexity. Quantum clustering algorithms are developed to improve the performance and to achieve higher gain. In this work, we ...

The construction of multiqubit unextendible product bases (UPBs) is an important problem in quantum information. We construct a 7-qubit UPB of size 10 by studying the unextendible orthogonal matrices. We apply our result to construct an 8-qubit ...

In this paper, a new concept of the resolution map is presented to extract periodic structures that compose the signal. The resolution map is described by using the frequency–time representation of the signal, which is known as the paired ...

Diner’s dilemma is a problem of interest to both economics and game theory. Here, we solve this problem for n = 4 (where n is the number of players) with quantum rules. We are able to remove the dilemma of diners between the Pareto optimal and ...

We propose a scheme to control quantum coherence of a two-component Bose–Einstein condensate (BEC) by a single impurity atom immersed in the BEC. We show that the single impurity atom can act as a single-atom valve (SAV) to control quantum ...