BackBrowsing Artículos by Author "Wu, Lianao"
Now showing items 1-10 of 10
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An anomaly in quantum phases induced by borders
(Nature, 2020-04-24)The stationary behavior of a quantum system is determined by its Hamiltonian and its boundary conditions. All quantum phase transitions (QPT) reported previously were induced by changing the Hamiltonian. In a circular spin ... -
An Exact Approach to Elimination of Leakage in a Qubit Embedded in a Three-level System
(Nature, 2019-07-30)Leakage errors damage a qubit by coupling it to other levels. Over the years, several theoretical approaches to dealing with such errors have been developed based on perturbation arguments. Here we propose a different ... -
Fault-tolerant almost exact state transmission
(Nature Publishing Group, 2013-11)We show that a category of one-dimensional XY-type models may enable high-fidelity quantum state transmissions, regardless of details of coupling configurations. This observation leads to a fault-tolerant design of a state ... -
Hamiltonian transformability, fast adiabatic dynamics and hidden adiabaticity
(Springer Nature, 2021-02-25)We prove the existence of a unitary transformation that enables two arbitrarily given Hamiltonians in the same Hilbert space to be transformed into one another. The result is straightforward yet, for example, it lays the ... -
High- fi delity non-adiabatic cutting and stitching of a spin chain via local control
(IOP Publishing, 2018-10-18)We propose and analyze, focusing on non-adiabatic effects, a technique of manipulating quantum spin systems based on local 'cutting' and 'stitching' of the Heisenberg exchange coupling between the spins. This first operation ... -
Nonperturbative dynamical decoupling with random control
(Nature Publishing Group, 2014-08-29)Parametric fluctuations or stochastic signals are introduced into the rectangular pulse sequence to investigate the feasibility of random dynamical decoupling. In a large parameter region, we find that the out-of-order ... -
One-component quantum mechanics and dynamical leakage-free paths.
(Nature, 2022-06)We derive an exact one-component equation of motion for the probability amplitude of a target time-dependent state, and use the equation to reformulate quantum dynamics and control for both closed and open systems. Using ... -
Optimally Controlled Non-Adiabatic Quantum State Transmission in the Presence of Quantum Noise
(MDPI, 2023-03-05)Pulse-controlled non-adiabatic quantum state transmission (QST) was proposed many years ago. However, in practice environmental noise inevitably damages communication quality in the proposal. In this paper, we study the ... -
Symmetry restoration and quantumness reestablishment
(Nature Publishing Group, 2014-09-18)A realistic quantum many-body system, characterized by a generic microscopic Hamiltonian, is accessible only through approximation methods. The mean field theories, as the simplest practices of approximation methods, ... -
Trotterized adiabatic quantum simulation and its application to a simple all-optical system
(2020-05)As first proposed for the adiabatic quantum information processing by Wu et al (2002 Phys. Rev. Lett. 89 057904), the Trotterization technique is a very useful tool for universal quantum computing, and in particular, the ...