Quantum Hamiltonians and reduced ground states
The Hamiltonians we consider in this work are infinite one-dimensional translation-invariant with nearest- and next-to-nearest neighbor interactions with two dichotomic observables σx, σy per site:
Category: 4. Physics
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Trade-off between gradient measurement efficiency and expressivity in deep quantum neural networks
Model, efficiency, and expressivity
We consider the following QNN on an n-qubit system:
$$\begin{array}{r}U({\boldsymbol{\theta }})=\mathop{\prod }\limits_{j=1}^{L}\exp (i{\theta }_{j}{G}_{j}),\end{array}$$
(1)
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Separating altermagnetic and ferromagnetic effects in X-ray magnetic dichroism of rutile NiF2
Šmejkal, L., Sinova, J. & Jungwirth, T. Emerging research landscape of altermagnetism. Phys. Rev. X 12, 040501 (2022).
Šmejkal, L., Sinova, J. & Jungwirth, T. Beyond conventional…
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New cobalt hydroxycarbonate-based material for highly sensitive enzyme-free glucose sensors
Jing, Y., Chang, S. J., Chen, C.-J. & Liu, J.-T. Review—Glucose monitoring sensors: History, principle, and challenges. J. Electrochem. Soc. 169, 057514. https://doi.org/10.1149/1945-7111/ac6980 (2022).
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Temperature-dependent modeling and enhanced measurement of ultrasonic velocity in LAS glass–ceramics
Sample preparation and ultrasonic velocity measurement system
The selected object was an ultra-low expansion LAS glass–ceramics supplied by CDGM Co., Ltd., China. The typical mechanical parameter values of this material are ρ = 2.54 g/cm3,…
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Machine learning message-passing for the scalable decoding of QLDPC codes
We map the problem of decoding QLDPC codes to the problem of solving Sudoku using GNNs. Figure 6 is an analogy of mapping initial filled cells from the Sudoku board to syndrome measurement values. Originally, GNNs were used by54 to solve…
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Duality and degeneracy lifting in two-dimensional electron liquids on SrTiO3(001)
Bulk-truncated SrTiO3(001) surface
With our recently developed cleaving technique that exploits the strain-induced ferroelectric phase transition in SrTiO317, we routinely create surfaces that are truly bulk-terminated, atomically flat, and…
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Characteristic scales and adaptation in higher-order contagions
Generalized approximate master equations
To accurately capture dynamical correlations and the local state of the dynamics, mathematical models often rely on approximate master equations (AME)11,12,13,14,15,16,17,18,19,20. One can describe…
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Linear magnet with fluid-solid-switchable cells for flexible devices
Magnetospirillum magneticum-inspired programmable linear magnet
As illustrated in Fig. 1a, b, our linear magnet is composed of a transparent hydrogel matrix and discrete PCM cells containing NdFeB magnetic…
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New Theory Suggests Dark Matter Is Frozen Relics of Light-Speed Particles : ScienceAlert
In an ongoing quest to guess the secret behind the Universe’s excess in gravity, two researchers from Dartmouth College in the US have proposed a chilling union between massless particles soon after the Big Bang.
For the better part of a…
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