Quantum Information Processing
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Quantitative wave–particle duality relations from the density matrix properties
Quantum Information Processing - Tập 19 - Trang 1-24 - 2020
We derive upper bounds for Hilbert–Schmidt’s quantum coherence of general states of a d-level quantum system, a qudit, in terms of its incoherent uncertainty, with the latter quantified using the linear and von Neumann’s entropies of the corresponding closest incoherent state. Similar bounds are obtained for Wigner–Yanase’s coherence. The reported inequalities are also given as coherence–populatio......
Quantum operation sharing with symmetric and asymmetric W states
Quantum Information Processing - Tập 12 - Trang 2453-2464 - 2013
Two tripartite schemes for sharing a single-qubit operation on a remote target state are proposed with symmetric and asymmetric W states, respectively. They are treated and compared from the aspects of quantum resource consumption, operation complexity, classical resource consumption, success probability and efficiency. It is found that the first scheme is better than the second one. In particular......
An improved robust ADMM algorithm for quantum state tomography
Quantum Information Processing - Tập 15 - Trang 2343-2358 - 2016
In this paper, an improved adaptive weights alternating direction method of multipliers algorithm is developed to implement the optimization scheme for recovering the quantum state in nearly pure states. The proposed approach is superior to many existing methods because it exploits the low-rank property of density matrices, and it can deal with unexpected sparse outliers as well. The numerical exp......
Limitations on post-processing assisted quantum programming
Quantum Information Processing - Tập 16 - Trang 1-15 - 2017
A quantum multimeter is a programmable device that can implement measurements of different observables depending on the programming quantum state inserted into it. The advantage of this arrangement over a single-purpose device is in its versatility: one can realize various measurements simply by changing the programming state. The classical manipulation of measurement output data is known as post-......
Optimal quantum state transformations based on machine learning
Quantum Information Processing - Tập 20 - Trang 1-18 - 2021
It is well known that quantum algorithms may solve problems efficiently that are intractable using conventional algorithms. Quantum algorithms can be designed with a set of universal quantum gates that transform input states into desired output states. However, designing quantum algorithms that transform states in desired ways is challenging due to its complexity. In this paper, we propose a machi......
Density matrix formalism of duality quantum computer and the solution of zero-wave-function paradox
Quantum Information Processing - Tập 11 - Trang 317-323 - 2011
Duality quantum computer can accommodate both unitary and non-unitary operations. In this paper, we derive the mathematical theory of duality quantum computer in terms of density matrix using the duality mode of quantum computers. We give a solution to the ‘zero-wave-function’ paradox of duality quantum computer raised by Zou et al. (Quantum Inf Process 8:37–50 2009) where in duality quantum compu......
Two-level information hiding for quantum images using optimal LSB
Quantum Information Processing - Tập 18 - Trang 1-19 - 2019
As a primary branch of information hiding, quantum image steganography has become one of the most popular areas of study in the field of security. In this paper, the two-level embedding approach for information hiding is surveyed using an optimal least significant bit (LSB) quantum steganography algorithm, which only modifies at most one qubit of the LSBs of each pixel to perform embedding. The fi......
Improvements on “multiparty quantum key agreement with single particles”
Quantum Information Processing - Tập 12 - Trang 3411-3420 - 2013
Recently, Liu et al. (Quantum Inf Process 12: 1797–1805, 2013) proposed a secure multiparty quantum key agreement (MQKA) protocol with single particles. Their protocol allows N parties to negotiate a secret session key in such away that (1) outside eavesdroppers cannot gain the session key without introducing any errors; (2) the session key cannot be determined by any non-trivial subset of the par......
Generation and swapping of multi-qubit entangled state in a coupled superconducting resonator array
Quantum Information Processing - Tập 17 - Trang 1-16 - 2018
An efficient method is proposed for the generation and swapping of multi-qubit entangled state in an array of linearly coupled superconducting resonators, each of which is coupled to N superconducting qubits. With the external driving fields to adjust the desired qubit–resonator interaction, we firstly show that the multipartite entangled state of superconducting qubits hosted in two nearest-neigh......
Analytical solution and applications of three qubits in three coupled modes without rotating wave approximation
Quantum Information Processing - Tập 17 - Trang 1-18 - 2018
We study the dynamics of the three-qubit system interacting with multi-mode without rotating wave approximation (RWA). A physical realization of the system without direct qubits interactions with dephasing bath is proposed. It is shown that non-Markovian characters of the purity of the three qubits and the coupling strength of modes are stronger enough the RWA is no longer valid. The influences of......
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