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...
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-...
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...
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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