Basic photonic structures and their properties
We first consider a two-dimensional (2D) photonic crystal (PC) with a square lattice as shown in Fig. 1a. The structure is invariant in the z direction and has a period a in the x and y directions….
Category: 4. Physics
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Quantum Speed Hack: Extra Qubits Slash Measurement Time Without Losing Precision
Quantum scientists have cracked a longstanding problem by devising a method to speed up measurements without losing accuracy, a key hurdle for quantum technology. By cleverly adding extra qubits, they traded “space” for time, gathering more…
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Quarks Gone Rogue: Flavor Symmetry Break Sparks Physics Shake-Up at CERN
In high-energy collisions between argon and scandium atomic nuclei, scientists from the international NA61/SHINE experiment have uncovered a striking anomaly. It points to a possible breakdown of one of the most fundamental principles in particle…
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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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Development of a portable high-Tc spherical neutron polarimetry device at the Oak Ridge National Laboratory
To date, existing SNP devices are designed for monochromatic neutron beams and are ill-suited for the broad neutron spectrum characteristic of a pulsed beam. A research team at ILL has proposed a design that utilizes double precession regions in…
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Cost of locally approximating high-dimensional ground states of contextual quantum models
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:
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