13 hasil untuk "Yu-Ran, Zhang"
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Artikel Jurnal
Noisy probabilistic error cancellation and generalized physical implementability
Abstract Decoherence severely limits the performance of quantum processors, posing challenges to reliable quantum computation. Probabilistic error cancellation, a quantum error mitigation method, counteracts noise by quasiprobabilistically simulating (non-physical) inverse noise operations…
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Artikel Jurnal
Non-Hermitian sensing from the perspective of postselected measurements
By employing the Naimark dilation, we establish a fundamental connection between non-Hermitian quantum sensing and postselected measurements. The sensitivity of non-Hermitian quantum sensors is determined by the effective quantum Fisher information (QFI), which incorporates the success probability…
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Artikel Jurnal
Versatile control of nonlinear topological states in non-Hermitian systems
Abstract The non-Hermitian skin effect (NHSE) and nonlinearity can both delocalize topological modes (TMs) from the interface. However, the NHSE requires precise parameter tuning, while the nonlinearity in Hermitian systems results in partial delocalization with limited mode capacity. To overcome…
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Artikel Jurnal
Variational generation of spin squeezing on one-dimensional quantum devices with nearest-neighbor interactions
Efficient preparation of spin-squeezed states is important for quantum-enhanced metrology. Current protocols for generating strong spin squeezing rely on either high dimensionality or long-range interactions. A key challenge is how to generate considerable spin squeezing in one-dimensional systems…
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Artikel Jurnal
Multipartite entanglement of the topologically ordered state in a perturbed toric code
We demonstrate that multipartite entanglement, witnessed by the quantum Fisher information, can characterize topological quantum phase transitions in the spin-1/2 toric code model (TCM) on a square lattice with external fields. We show that the quantum Fisher information density of the ground state…
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Artikel Jurnal Teks lengkap
Erratum: Correspondence: Reply to ‘Enhancing a phase measurement by sequentially probing a solid-state system'
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Artikel Jurnal
Arbitrary control of non-Hermitian skin modes via disorder and an electric field
The non-Hermitian skin effect (NHSE), characterized by the accumulation of a macroscopic number of bulk states at system boundaries, is a hallmark of non-Hermitian physics. However, in higher dimensions, achieving deterministic control over where skin modes accumulate remains a major challenge…
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Artikel Jurnal
Experimental investigation of quantum entropic uncertainty relations for multiple measurements in pure diamond
Abstract One unique feature of quantum mechanics is the Heisenberg uncertainty principle, which states that the outcomes of two incompatible measurements cannot simultaneously achieve arbitrary precision. In an information-theoretic context of quantum information, the uncertainty principle can be…
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Artikel Jurnal
Observation of Bloch oscillations and Wannier-Stark localization on a superconducting quantum processor
Abstract The Bloch oscillation (BO) and Wannier-Stark localization (WSL) are fundamental concepts about metal-insulator transitions in condensed matter physics. These phenomena have also been observed in semiconductor superlattices and simulated in platforms such as photonic waveguide arrays and…
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Artikel Jurnal
Simulating Chern insulators on a superconducting quantum processor
Abstract The quantum Hall effect, fundamental in modern condensed matter physics, continuously inspires new theories and predicts emergent phases of matter. Here we experimentally demonstrate three types of Chern insulators with synthetic dimensions on a programable 30-qubit-ladder superconducting…
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Artikel Jurnal
Probing spin hydrodynamics on a superconducting quantum simulator
Abstract Characterizing the nature of hydrodynamical transport properties in quantum dynamics provides valuable insights into the fundamental understanding of exotic non-equilibrium phases of matter. Experimentally simulating infinite-temperature transport on large-scale complex quantum systems is…
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Artikel Jurnal
Interplay between disorder and topology in Thouless pumping on a superconducting quantum processor
Abstract Topological phases are robust against weak perturbations, but break down when disorder becomes sufficiently strong. However, moderate disorder can also induce topologically nontrivial phases. Thouless pumping, as a (1+1)D counterpart of the integer quantum Hall effect, is one of the…