189 citations · 706 across the 23 of their papers we have counts for
23 papers
Superiority of Krylov shadow tomography in estimating quantum Fisher information: From bounds to exactness
Yuan-Hao Wang, Da-Jian Zhang
Estimating the quantum Fisher information (QFI) is a crucial yet challenging task with widespread applications across quantum science and technologies. The recently proposed Krylov…
Survival of Hermitian Criticality in the Non-Hermitian Framework
Fei Wang, Guoying Liang, Zecheng Zhao +3
In this work, we investigate many-body phase transitions in a one-dimensional anisotropic XY model subject to a complex-valued transverse field. Within the biorthogonal framework,…
Strict hierarchy of optimal strategies for global estimations: Linking global estimations with local ones
Zhao-Yi Zhou, Jing-Tao Qiu, Da-Jian Zhang
A crucial yet challenging issue in quantum metrology is to ascertain the ultimate precision achievable in estimation strategies. While there are two paradigms of estimations, local…
Non-Hermitian Floquet Topological Matter -- A Review
Longwen Zhou, Da-Jian Zhang
The past few years have witnessed a surge of interest in non-Hermitian Floquet topological matters due to their exotic properties resulting from the interplay between driving field…
Inferring physical properties of symmetric states from the fewest copies
Da-Jian Zhang, D. M. Tong
Learning physical properties of high-dimensional states is crucial for developing quantum technologies but usually consumes an exceedingly large number of samples which are difficu…
Correlation-induced coherence and its use in detecting quantum phase transitions
Ming-Ming Du, Abdul Sattar Khan, Zhao-Yi Zhou +1
The past two decades have witnessed a surge of interest in exploring correlation and coherence measures to investigate quantum phase transitions (QPTs). Here, motivated by the cont…
Approaching Heisenberg-scalable thermometry with built-in robustness against noise
Da-Jian Zhang, D. M. Tong
It is a major goal in quantum thermometry to reach a scaling of thermometric precision known as Heisenberg scaling but is still in its infancy to date. The main obstacle is t…
Two geometric phases can dramatically differ from each other even if their evolution paths are sufficiently close in a pointwise manner
Da-Jian Zhang, P. Z. Zhao, G. F. Xu
One milestone in quantum physics is Berry's seminal work [Proc.~R.~Soc.~Lond.~A \textbf{392}, 45 (1984)], in which a quantal phase factor known as geometric phase was discovered to…
Visualizing quantum phase transitions in the XXZ model via the quantum steering ellipsoid
Ming-Ming Du, Da-Jian Zhang, Zhao-Yi Zhou +1
The past two decades have witnessed a surge of interest in borrowing tools from quantum information theory to investigate quantum phase transitions (QPTs). The best known examples…
Topological characterization of one-dimensional open fermionic systems
Da-Jian Zhang, Jiangbin Gong
A topological measure characterizing symmetry-protected topological phases in one-dimensional open fermionic systems is proposed. It is built upon the kinematic approach to the geo…
Dissipative Adiabatic Measurements: Beating the Quantum Cramér-Rao Bound
Da-Jian Zhang, Jiangbin Gong
It is challenged only recently that the precision attainable in any measurement of a physical parameter is fundamentally limited by the quantum Cramér-Rao Bound (QCRB). Here, targe…
Dissipative Quantum Metrology
Da-Jian Zhang, Jiangbin Gong
Conventional strategies of quantum metrology are built upon POVMs, thereby possessing several general features, including the demolition of the state to be measured, the need of pe…
Revealing many-body effects on interband coherence through adiabatic charge pumping
Sen Mu, Da-Jian Zhang, Longwen Zhou +1
The adiabatic charge pumping of a non-equilibrium state of spinless fermions in a one-dimensional lattice is investigated, with an emphasis placed on its usefulness in revealing ma…
Time-dependent -symmetric quantum mechanics in generic non-Hermitian systems
Da-Jian Zhang, Qing-hai Wang, Jiangbin Gong
-symmetric quantum mechanics has been considered an important theoretical framework for understanding physical phenomena in -symmetric systems, with a n…
Differential geometry of time-dependent -symmetric quantum mechanics
Da-Jian Zhang, Qing-hai Wang, Jiangbin Gong
Time-dependent -symmetric quantum mechanics is featured by a varying inner-product metric and has stimulated a number of interesting studies beyond conventional quant…
Quantum Geometric Tensor in -Symmetric Quantum Mechanics
Da-Jian Zhang, Qing-hai Wang, Jiangbin Gong
A series of geometric concepts are formulated for -symmetric quantum mechanics and they are further unified into one entity, i.e., an extended quantum geometric tenso…
Estimating coherence measures from limited experimental data available
Da-Jian Zhang, C. L. Liu, Xiao-Dong Yu +1
Quantifying coherence has received increasing attention, and considerable work has been directed towards finding coherence measures. While various coherence measures have been prop…
General approach to find steady-state manifolds in Markovian and non-Markovian systems
Da-Jian Zhang, Xiao-Dong Yu, Hua-Lin Huang +1
Steady-state manifolds of open quantum systems, such as decoherence-free subspaces and noiseless subsystems, are of great practical importance to the end of quantum information pro…
Universal freezing of asymmetry
Da-Jian Zhang, Xiao-Dong Yu, Hua-Lin Huang +1
Asymmetry of quantum states is a useful resource in applications such as quantum metrology, quantum communication, and reference frame alignment. However, asymmetry of a state tend…
Alternative framework for quantifying coherence
Xiao-Dong Yu, Da-Jian Zhang, G. F. Xu +1
We propose an alternative framework for quantifying coherence. The framework is based on a natural property of coherence, the additivity of coherence for subspace-independent state…
Measure-Independent Freezing of Quantum Coherence
Xiao-Dong Yu, Da-Jian Zhang, C. L. Liu +1
We find that all measures of coherence are frozen for an initial state in a strictly incoherent channel if and only if the relative entropy of coherence is frozen for the state. Ou…
Non-Markovian quantum dissipative processes with the same positive features as Markovian dissipative processes
Da-Jian Zhang, Hua-Lin Huang, D. M. Tong
It has been found that Markovian quantum dissipative processes, described by the Lindblad equation, may have attractive steady-state manifolds, in which dissipation and decoherence…
Theorem on the existence of a nonzero energy gap in adiabatic quantum computation
Da-Jian Zhang, Xiao-Dong Yu, D. M. Tong
Adiabatic quantum computation, based on the adiabatic theorem, is a promising alternative to conventional quantum computation. The validity of an adiabatic algorithm depends on the…