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Condensed Matter, Volume 8, Issue 1

March 2023 - 29 articles

Cover Story: Recent work on approximating ground states of Heisenberg spin clusters by projected Hartree–Fock theory (PHF) has extended to a cluster-based ansatz (cPHF): a cluster product optimized for symmetry restoration. Intracluster correlation is included at the mean-field level, while intercluster correlation is introduced through symmetry projection. Variants of cPHF are evaluated for ground states and singlet-triplet gaps of antiferromagnetic spin rings, where cPHF significantly improves over PHF. In contrast to spin rings, certain two- or three-dimensional spin arrangements permit cluster groupings compatible with the full spatial symmetry. Thus, cPHF yields approximate ground states with correct spin and point group quantum numbers for honeycomb lattice fragments and symmetric polyhedral. View this paper
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Articles (29)

  • Article
  • Open Access
5 Citations
7,503 Views
19 Pages

Investigating the Individual Performances of Coupled Superconducting Transmon Qubits

  • Halima Giovanna Ahmad,
  • Caleb Jordan,
  • Roald van den Boogaart,
  • Daan Waardenburg,
  • Christos Zachariadis,
  • Pasquale Mastrovito,
  • Asen Lyubenov Georgiev,
  • Domenico Montemurro,
  • Giovanni Piero Pepe and
  • Marten Arthers
  • + 5 authors

The strong requirement for high-performing quantum computing led to intensive research on novel quantum platforms in the last decades. The circuital nature of Josephson-based quantum superconducting systems powerfully supports massive circuital freed...

  • Article
  • Open Access
2 Citations
2,184 Views
15 Pages

We studied the spin-dependent behavior of the electronic properties of alternating periodic potentials applied to finite and infinite graphene superlattices coupled with tunable electrostatic and exchange fields. The band structures were evaluated us...

  • Article
  • Open Access
2 Citations
2,606 Views
13 Pages

Complex Functions, Multipoles and Light Polarization in a Ferrocell

  • Alberto Tufaile and
  • Adriana Pedrosa Biscaia Tufaile

Ferrofluid is a magnetic fluid that undergoes structural changes when subjected to a magnetic field, with the formation of arrays of nanoparticles aligned with the field. Using polarized light passing through the ferrofluid, we can observe the format...

  • Article
  • Open Access
3 Citations
2,015 Views
8 Pages

Effect of Transverse Confinement on a Quasi-One-Dimensional Dipolar Bose Gas

  • Stefania De Palo,
  • Edmond Orignac,
  • Roberta Citro and
  • Luca Salasnich

We study a gas of bosonic dipolar atoms in the presence of a transverse harmonic trapping potential by using an improved variational Bethe ansatz, which includes the transverse width of the atomic cloud as a variational parameter. Our calculations sh...

  • Article
  • Open Access
2,990 Views
9 Pages

Exploring the Ultrafast Charge-Transfer and Redox Dynamics in Layered Transition Metal Oxides

  • Guannan Qian,
  • Xiaobiao Huang,
  • Jun-Sik Lee,
  • Piero Pianetta and
  • Yijin Liu

The rapid development and broad deployment of rechargeable batteries have fundamentally transformed modern society by revolutionizing the sectors of consumer electronics, transportation, and grid energy storage. Redox reactions in active battery cath...

  • Article
  • Open Access
7 Citations
3,382 Views
9 Pages

Computer networks consist of millions of nodes that need constant protection because of their continued vulnerability to attacks. Classical security methods for protecting such networks will not be effective enough if quantum computers become widespr...

  • Article
  • Open Access
2,417 Views
10 Pages

The energy level schema of the ground term of the nickel ion in NiCr2O4 was calculated. The parameters of the interaction with the electric field were determined, and the distribution pattern of the electric dipole moments over different positions of...

  • Article
  • Open Access
2 Citations
4,702 Views
39 Pages

The aim of this paper is to present a model for the rheological behavior of simple liquids as a function of the amplitude of the imposed shear stress or strain. The elastic mode theory is first generalized to take into account the fact that, during a...

  • Article
  • Open Access
2 Citations
2,368 Views
12 Pages

A Method to Probe the Interfaces in La2−xSrxCuO4-LaSrAlO4-La2−xSrxCuO4 Trilayer Junctions

  • Xiaotao Xu,
  • Xi He,
  • Anthony T. Bollinger,
  • Myung-Geun Han,
  • Yimei Zhu,
  • Xiaoyan Shi and
  • Ivan Božović

C-axis trilayer cuprate Josephson junctions are essential for basic science and digital circuit applications of high-temperature superconductors. We present a method for probing the interface perfection in La2−xSrxCuO4 (LSCO)-LaSrAlO4 (LSAO)-La...

  • Article
  • Open Access
1 Citations
1,968 Views
7 Pages

This study is devoted to the investigation of the Josephson phase qubit spectrum considering the anharmonic current-phase relation of the junction. The change in energy difference in the spectrum of phase qubits based on single-band/multiband Josephs...

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Condens. Matter - ISSN 2410-3896