88 citations · 400 across the 23 of their papers we have counts for
22 papers
Quantum state tomography through multi-frequency Josephson effect
Xian-Peng Zhang, Ting-Rui Hu, Zhen-Biao Yang +2
Macroscopic quantum effects emerge when the coherent behavior of countless microscopic quantum states manifests collectively at a visible scale, as exemplified by the supercurrent…
Theory of quantum decoherence in macroscopic topological insulators
Xian-Peng Zhang, Yan-Qing Feng, Wanxiang Feng +1
Quantum decoherence-the loss of quantum coherence due to interactions with an environment-plays a central role in quantum transport, and controlling this ubiquitous yet inevitable…
Metalization of topological insulators
Xian-Peng Zhang, Yan-Qing Feng, Ji-Feng Shao +2
In modern condensed matter theory, phases of electronic matter--such as metals and insulators-are fundamentally distinguished by the presence or absence of charge-carrying quasipar…
Magnetoresistance from decoherence
Xian-Peng Zhang, Yan-Qing Feng, Haiwen Liu +1
Microscopic theories of magnetoresistance have traditionally focused on momentum relaxation and the plasma frequency of itinerant electrons. Here, we uncover a distinct mechanism i…
Theory of quantum decoherence and its application to anomalous Hall effect
Xian-Peng Zhang, Yan-Qing Feng, Haiwen Liu +2
Coherent quantum phenomena can only emerge when decoherence is minimized, and mastery over decoherence is technologically crucial for designing and operating functional quantum dev…
Open quantum theory of magnetoresistance in mesoscopic magnetic materials
Xian-Peng Zhang, Xiangrong Wang, Yugui Yao
Magnetoresistance (MR) in magnetic materials arises from spin-exchange coupling between local moments and itinerant electrons, representing a challenging many-body open-quantum pro…
Andreev qubit readout from dynamic interference supercurrent
Xian-Peng Zhang, Chuanchang Zeng, Zhen-Biao Yang +2
Nondemolition protocols use ancilla qubits to identify the fragile quantum state of a qubit without destroying its encoded information, thus playing a crucial role in nondestructiv…
A Theory of Anisotropic Magnetoresistance in Altermagnets and Its Applications
Xian-Peng Zhang, Run-Wu Zhang, Xiaolong Fan +3
Altermagnets, a newly discovered class of magnets, integrate the advantages of both ferromagnets and antiferromagnets, such as enabling anomalous transport without stray fields and…
Quantum spin decoherence theory of magnetoresistance in mesoscopic ferromagnets and its applications
X. -P. Zhang, X. Wang, Y. Yao
Quantum decoherence is the key mechanism determining whether quantum effects can manifest in quantum computation and transport, and mastering decoherence is central to designing an…
Renormalized and iterative formalism of the Andreev levels within large multi-parametric space
Xian-Peng Zhang
We attain a renormalized and iterative expression of the Andreev level in a quantum-dot Josephson junction, which is bound to have significant implications due to several significa…
Fabry-Perot superconducting diode
Xian-Peng Zhang
Superconducting diode effects (SDEs) occur in systems with asymmetric critical supercurrents yielding dissipationless flow in one direction , while…
Fermi sea and sky in the Bogoliubov-de Gennes equation
Xian-Peng Zhang, Yugui Yao
We develop a comprehensive logical framework for effectively handling the overcomplete basis set in the Bogoliubov-de Gennes equation that contains two orthonormal basis sets conju…
Large and tunable magnetoresistance in van der Waals Ferromagnet/Semiconductor junctions
Wenkai Zhu, Yingmei Zhu, Tong Zhou +11
Magnetic tunnel junctions (MTJs) with conventional bulk ferromagnets separated by a nonmagnetic insulating layer are key building blocks in spintronics for magnetic sensors and mem…
Coupled superconducting spin qubits with spin-orbit interaction
Maria Spethmann, Xian-Peng Zhang, Jelena Klinovaja +1
Superconducting spin qubits, also known as Andreev spin qubits, promise to combine the benefits of superconducting qubits and spin qubits defined in quantum dots. While most approa…
Paramagnetic spin Hall magnetoresistance
Koichi Oyanagi, Juan M. Gomez-Perez, Xian-Peng Zhang +9
Spin Hall magnetoresistance (SMR) refers to a resistance change in a metallic film reflecting the magnetization direction of a magnet attached to the film. The mechanism of this ph…
Strong interfacial exchange field in a heavy metal/ferromagnetic insulator system determined by spin Hall magnetoresistance
Juan M. Gomez-Perez, Xian-Peng Zhang, Francesco Calavalle +9
Spin-dependent transport at heavy metal/magnetic insulator interfaces is at the origin of many phenomena at the forefront of spintronics research. A proper quantification of the di…
Phase-Controllable Nonlocal Spin Polarization in Proximitized Nanowires
X. P. Zhang, V. N. Golovach, F. Giazotto +1
We study the magnetic and superconducting proximity effects in a semiconducting nanowire (NW) attached to superconducting leads and a ferromagnetic insulator (FI). We show that a s…
Theory of Spin Hall Magnetoresistance from a Microscopic Perspective
X. P. Zhang, F. S. Bergeret, V. N. Golovach
We present a theory of the spin Hall magnetoresistance of metals in contact with magnetic insulators. We express the spin-mixing conductances, which govern the phenomenology of the…
Control of Spin Diffusion and Suppression of the Hanle Effect by the Coexistence of Spin and Valley Hall Effects
Xian-Peng Zhang, Chunli Huang, Miguel A. Cazalilla
In addition to spin, electrons in many materials possess an additional pseudo-spin degree of freedom known as 'valley'. In materials where the spin and valley degrees of freedom ar…
Valley Hall Effect and Nonlocal Transport in Strained Graphene
Xian-Peng Zhang, Chunli Huang, Miguel A. Cazalilla
Graphene subject to high levels of shear strain leads to strong pseudo-magnetic fields resulting in the emergence of Landau levels. Here we show that, with modest levels of strain,…
External control of qubit-photon interaction and multi-qubit reset in a dissipative quantum network
Xian-Peng Zhang, Li-Tuo Shen, Zhang-Qi Yin +3
A quantum network is a promising quantum many-body system because of its tailored geometry and controllable interaction. Here, we propose an external control scheme for the qubit-p…
Resonator-Assisted Quantum Bath Engineering of a Flux Qubit
Xian-Peng Zhang, Li-Tuo Shen, Zhang-Qi Yin +2
We demonstrate quantum bath engineering for preparation of any orbital state with controllable phase factor of a superconducting flux qubit assisted by a microwave coplanar wavegui…