- Dynamical phases in quenched spin–orbit-coupled degenerate.
- Phase separation in a polarized Fermi gas with spin-orbit coupling.
- Contact Theory for Spin-Orbit-Coupled Fermi Gases - PubMed.
- FERMI GASES WITH SYNTHETIC SPIN-ORBIT COUPLING | Annual Review of Cold.
- Collective dipole oscillations of a spin-orbit coupled Fermi gas.
- Accurate projective two-band description of topological superfluidity in.
- Rashba spin-orbit-coupled atomic Fermi gases.
- Pdf spin orbit coupled fermi gas.
- JQI Physicists Demonstrate Coveted 'Spin-Orbit Coupling' for the First.
- Collective modes of spin-orbit-coupled Fermi gases in the repulsive.
- Impurity in a Fermi gas under non-Hermitian spin-orbit coupling.
- Spin-injection spectroscopy of a spin-orbit coupled Fermi gas.
- Accurate computations of Rashba spin-orbit coupling in... - arXiv Vanity.
Dynamical phases in quenched spin–orbit-coupled degenerate.
The collective dipole mode is induced and measured in a spin-orbit (SO) coupled degenerate Fermi gas of 173Yb atoms. Using a differential optical Stark shift, we split the degeneracy of three. May 10, 2013 · Here we create and detect spin-orbit coupling in an atomic Fermi gas, a highly controllable form of quantum degenerate matter. We reveal the spin-orbit gap via spin-injection spectroscopy, which. We consider finite-momentum pairing of a superfluid ultracold Fermi gas subject to spin-orbit coupling and an effective Zeeman field. Based on our two-body and mean-field many-body calculations, we show that the Fulde-Ferrell-type superfluid dominates in both zero- and finite-temperature phase diagrams. We examine the origin and properties of.
Phase separation in a polarized Fermi gas with spin-orbit coupling.
The above two obstacles can be overcome using spin-orbit (SO) coupled degenerate Fermi gases with an in-plane Zeeman field. SO coupling is essential for many important phenomena in condensed matter physics22,23. In solid materials, SO coupling is induced by inversion symmetry breaking of the bulk structure24. While in cold. The topology of Fulde–Ferrell (FF) superfluids with nonzero momentum pairings have never been explored until recent findings that FF superfluids in a spin–orbit (SO) coupled Fermi gas can accommodate Majorana fermions in real space in low dimensions and Weyl fermions in momentum space in three dimension.
Contact Theory for Spin-Orbit-Coupled Fermi Gases - PubMed.
Spin–orbit coupling in two dimensions is essential for observing topological phases in ultracold atoms. Such a coupling was produced in a gas of potassium atoms and a robust Dirac point was.
FERMI GASES WITH SYNTHETIC SPIN-ORBIT COUPLING | Annual Review of Cold.
OSTI.GOV Journal Article: Rashba spin-orbit-coupled atomic Fermi gases. TLDR. It is shown that investigating SO coupling in cold atom systems can enrich the understanding of basic phenomena such as superfluidity, provide a good platform for simulating condensed matter states such as topological superfluids and result in novel quantum systems such as SO coupled unitary Fermi gas and high spin quantum gases. 367. PDF.
Collective dipole oscillations of a spin-orbit coupled Fermi gas.
The case of Rashba spin-orbit coupling [16,20,31-35], while more recent theoretical work has considered the equal mixture of Rashba and Dresselhaus spin-orbit coupling considered here [36,37]. We generate spin-orbit coupling in a Fermi gas by dressing the jf¼9=2;m F ¼ 7=2ij"i and jf¼9=2; m F ¼ 9=2ij#i hyperfine spin states of 40K's. Spin dynamics in a spin-orbit coupled Fermi gas. Authors: Stefan S. Natu, S. Das Sarma. Download PDF. Abstract: We study the dynamics of a non-degenerate, harmonically trapped Fermi gas following a sudden ramp of the spin-orbit coupling strength. In the non-interacting limit, we solve the Boltzmann equation in the presence of spin orbit.
Accurate projective two-band description of topological superfluidity in.
We develop the contact theory for spin-orbit-coupled Fermi gases. By using a perturbation method, we derive analytically the universal two-body behavior at short distance, which does not depend on the short-range details of interatomic potentials. We find that two new scattering parameters need to be introduced because of spin-orbit coupling. We describe the treatment of Rashba spin-orbit coupling (SOC) in interacting many-fermion systems within the auxiliary-field quantum Monte Carlo framework, and present a set of illustrative results. These include numerically exact calculations on the ground-state properties of the spin-balanced, attractive two-dimensional Fermi gas, as well as a study of a tight-binding Hamiltonian with. Raman fields have previously been used to generate spin-orbit coupling and gauge fields in pioneering work on Bose-Einstein condensates [10–12] and, recently, spin-orbit coupling in Fermi gases [13]. Here, we directly measure the spinful band structure of Eq. (1), as well as the rich band structure of a spin-orbit coupled lattice. For.
Rashba spin-orbit-coupled atomic Fermi gases.
The two-dimensional spin-imbalanced Fermi gas subject to s-wave pairing and spin-orbit coupling is considered a promising platform for realizing a topological chiral-p-wave superfluid.In the BCS limit of s-wave pairing, i.e., when Cooper pairs are only weakly bound, the system enters the topological phase via a second-order transition driven by. Using the diagrammatic approach, here we study how spin-orbit coupling (SOC) affects the fermion-dimer and dimer-dimer scattering lengths in the Born approximation, and we benchmark their accuracy with the higher-order approximations. We consider both isotropic and Rashba couplings in three dimensions and show that the Born approximation gives accurate results in the $1/(m\ensuremath{\alpha}{a.
Pdf spin orbit coupled fermi gas.
Spin-injection spectroscopy of a spin-orbit coupled Fermi gas. Phys. Rev. Lett., 109 (2012), Article 095302. CrossRef View Record in Scopus Google Scholar.... Matter-wave bright solitons in spin-orbit coupled Bose-Einstein condensates. Phys. Rev. Lett., 110 (2013), Article 264101. CrossRef View Record in Scopus Google Scholar. A spin-orbit-coupled Fermi gas could interact with itself because the lasers effectively split each atom into two distinct components, each with its own spin state, and two such atoms with. Next we study the time evolution of the magnetization in a Rashba spin-orbit-coupled Fermi gas, starting from a fully-polarized initial state. We model the dynamics using a Boltzmann equation, which we solve in the Hartree-Fock approximation. The resulting non-linear system of equations gives rise to three distinct dynamical regimes controlled.
JQI Physicists Demonstrate Coveted 'Spin-Orbit Coupling' for the First.
Phase separation in a polarized Fermi gas with spin-orbit. Within this work we only study Rashba spin-orbit coupling, and the spin-orbit field is defined as A = A x, 0, 0 where determines the spin-orbit field strength and is the field alignment. Theoretical Chemistry literature database. In this Letter, we report the first experimental realization and investigation of a spin-orbit coupled Fermi gas. Both spin dephasing in spin dynamics and momentum distribution asymmetry of the equilibrium state are observed as hallmarks of spin-orbit coupling in a Fermi gas. The single particle dis. In contrast with ordinary Fermi liquid, spin-orbit-coupled Fermi gas has strongly correlated spin and density excitations. Within the scheme of random-phase approximation, we classify collective modes based on the symmetry group and determine their properties via the poles of corresponding correlation functions. Besides, the particle-hole.
Collective modes of spin-orbit-coupled Fermi gases in the repulsive.
Collective dipole oscillations of a spin-orbit coupled Fermi gas. Scientific Reports 8 18005 (2018) arXiv:1811.09846 (2018) Igor Kuzmenko, Tetyana Kuzmenko, Yshai Avishai, Gyu-Boong Jo... Spin-orbit-coupled two-electron Fermi gases of ytterbium atoms. Phys. Rev. A Rapid Comm. 94, 061604(R) (2016) arXiv1608.00478. Rapid communications. Here we report the first experimental study of a spin-orbit coupled Fermi gas. We observe spin dephasing in spin dynamics and momentum distribution asymmetry in the equilibrium state as hallmarks. The coupling of the spin of electrons to their motional state lies at the heart of topological phases of matter. We have created and detected spin-orbit coupling in an atomic Fermi gas via spin-injection spectroscopy, which characterizes the energy-momentum dispersion and spin composition of the quantum states. For energies within the spin-orbit gap, the system acts as a spin diode. To fully.
Impurity in a Fermi gas under non-Hermitian spin-orbit coupling.
Aug 31, 2012 · The coupling of the spin of electrons to their motional state lies at the heart of recently discovered topological phases of matter. Here we create and detect spin-orbit coupling in an atomic Fermi gas, a highly controllable form of quantum degenerate matter. We directly reveal the spin-orbit gap vi. Jul 17, 2013 · However, for three-dimensional (3D) Fermi gas, the FFLO phase is not favored [18–21] 4. Over the last few years, another milestone achievement in cold-atom research, the realization of artificial spin–orbit (SO) coupling, first in bosonic systems and later in fermioinic ones [23, 24] has occurred. By tailoring the laser fields that generate. Jul 07, 2022 · [1411.3043] Fermi Gases with Synthetic Spin-Orbit Coupling. Anderson Localization in Degenerate Spin-Orbit Coupled Fermi Gas with. PDF BCS-BEC crossover in spin-orbit-coupled two-dimensional Fermi gases. PDF Spin-Injection Spectroscopy of a Spin-Orbit. PDF Validity of a single-channel model for a spin-orbit-coupled. PDF Radio-frequency.
Spin-injection spectroscopy of a spin-orbit coupled Fermi gas.
Collective dipole oscillations of a spin-orbit coupled Fermi gas Shanchao Zhang, Chengdong He, Elnur Hajiyev, Zejian Ren, Bo Song and Gyu-Boong Jo 1 1Department of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR The collective dipole mode is induced and measured in a spin-orbit (SO) coupled.
Accurate computations of Rashba spin-orbit coupling in... - arXiv Vanity.
The recent experimental realization of spin-orbit coupled Fermi gases provides a unique opportu-nity to study the interplay between strong interaction and SOC in a tunable, disorder-free system. We present here precision ab initio numerical results on the two-dimensional, unpolarized, uniform Fermi gas with attractive interactions and Rashba SOC. The U.S. Department of Energy's Office of Scientific and Technical Information.
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