Spin Orbit Coupled Fermi Gas - DEPOSITLOTUS.NETLIFY.APP

Dynamical phases in quenched spin–orbit-coupled.
Long-Lived Spin-Orbit-Coupled Degenerate Dipolar Fermi Gas.
Pairing superfluidity in spin-orbit coupled ultracold Fermi gases.
Collective dipole oscillations of a spin-orbit coupled Fermi gas.
Fulde-Ferrell pairing instability of a Rashba spin-orbit-coupled Fermi gas.
PDF Dark Solitons with Majorana Fermions in Spin-Orbit-Coupled Fermi Gases.
Spin-Injection Spectroscopy of a Spin-Orbit Coupled Fermi Gas.
The Pairing of Spin-orbit Coupled Fermi Gas in Optical Lattice.
Two-dimensional composite solitons in a spin-orbit.
Observation of Floquet bands in driven spin-orbit-coupled Fermi gases.
Dynamical phases in quenched spin–orbit-coupled degenerate Fermi gas.
Spin-Injection Spectroscopyof a Spin-Orbit Coupled Fermi Gas.
[PDF] Spin dynamics in a spin-orbit-coupled Fermi gas.

Dynamical phases in quenched spin–orbit-coupled.

We review some recent progresses on the study of ultracold Fermi gases with synthetic spin-orbit coupling. In particular, we focus on the pairing superfluidity in these systems at zero temperature. Recent studies have shown that different forms of spin-orbit coupling in various spatial dimensions can lead to a wealth of novel pairing superfluidity. Here we directly measure Floquet band dispersions in a periodically driven spin-orbit-coupled ultracold Fermi gas using spin-injection radio-frequency spectroscopy. We observe that the Dirac point originating from two-dimensional spin-orbit coupling can be manipulated to emerge at the lowest or highest two dressed bands by fast modulating Raman.

Long-Lived Spin-Orbit-Coupled Degenerate Dipolar Fermi Gas.

. Only one of these types, which occurs for finite spin-orbit coupling and a Zeeman field, survives to the topological phase transition, and is therefore capable of sustaining Majorana zero modes.... Two types of dark solitons in a spin-orbit-coupled Fermi gas Antonio Muñoz Mateo and Xiaoquan Yu Phys. Rev. A 105, L021301 - Published 18. Aug 01, 2016 · The realization of all-optical SOC for ytterbium fermions should offer a new route to a long-lived spin-orbit coupled Fermi gas and greatly expand our capability in studying novel spin-orbit physics with alkaline-earth-like atoms.

Pairing superfluidity in spin-orbit coupled ultracold Fermi gases.

FIG. 1. (a) Energy-level diagram of Fermi gases 40K. Three hyperﬁne spin states are coupled with the electronic excited states through three Raman lasers. The atoms are initially prepared in the free reservoir spin state |9/2,5/2. (b) Conﬁguration of three Raman lasers in the xy plane. The detunings of the Raman lasers 2 and 3 are. 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 via spin-injection spectroscopy, which characterizes.

Collective dipole oscillations of a spin-orbit coupled Fermi gas.

Rashba spin-orbit coupling, strong interactions, and the BCS-BEC crossover in the ground state of the two-dimensional Fermi gas Phys. Rev. Lett. , 117 ( 2016 ) , Article 040401 , 10.1103/PhysRevLett.117.040401. [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.

Fulde-Ferrell pairing instability of a Rashba spin-orbit-coupled Fermi gas.

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 two spin components of the Fermi gas are non-interacting by themselves, but the impurity has a tunable, spin-selective interaction with one of the spin species. Such a configuration is experimentally achievable by tuning close to a Feshbach resonance between the impurity atom and the relevant spin state of the Fermi gas. Reflections of the fermions from the trap boundaries provide a physical mechanism for effective momentum relaxation and nontrivial spin dynamics due to the emergent spin-orbit coupling. We explicitly consider evolution of an initially spin-polarized Fermi gas in a two-dimensional harmonic trap and derive nonequilibrium behavior of the spin.

PDF Dark Solitons with Majorana Fermions in Spin-Orbit-Coupled Fermi Gases.

Recent experimental breakthrough in realizing spin-orbit (SO) coupling for cold atoms has spurred considerable interest in the physics of 2D SO coupled Fermi superfluids, especially topological Majorana fermions (MFs) which were predicted to exist at zero temperature. However, it is well known that long-range superfluid order is destroyed in 2D by the phase fluctuation at finite temperature. 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. 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 dispersion is mapped out by using momentum-resolved.

Spin-Injection Spectroscopy of a Spin-Orbit Coupled Fermi Gas.

Enter the email address you signed up with and we'll email you a reset link. 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. 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 dispersion is mapped out by using momentum-resolved radio-frequency spectroscopy. From momentum.

The Pairing of Spin-orbit Coupled Fermi Gas in Optical Lattice.

Abstract: We investigate Rashba spin-orbit coupled Fermi gases in square optical lattice by using the determinant quantum Monte Carlo (DQMC) simulations which is free of the sign-problem. We show that the Berezinskii-Kosterlitz-Thoules phase transition temperature is firstly enhanced and then suppressed by spin-orbit coupling in the strong attraction region.

Two-dimensional composite solitons in a spin-orbit.

We theoretically investigate the Higgs oscillation in a one-dimensional Raman-type spin-orbit-coupled Fermi superfluid with the time-dependent Bogoliubov-de Gennes equations. By linearly ramping or abruptly changing the effective Zeeman field in both the Bardeen-Cooper-Schrieffer state and the topological superfluid state, we find the amplitude of the order parameter exhibits an oscillating. 1D spin-orbit-coupled Fermi gas were recently predicted [30,31]. However, the crucial issue raised in practical manipulations, i.e., the fate of these solitons at a finite velocity of motion, was not addressed. For concreteness, in the main text we focus on 1D spin-orbit-coupled Fermi superfluids. The results of 2D Fermi. 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.

Observation of Floquet bands in driven spin-orbit-coupled Fermi gases.

We firstly solve a two-body problem for spin-orbit coupled Fermi gas confined in quasi-low dimensional trapping potential. By analyzing the two-body bound state, we find that the population of the excited states in the tightly-confined direction would be significant when the two-body binding energy becomes comparable to or exceeds the energy. 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.

Dynamical phases in quenched spin–orbit-coupled degenerate Fermi gas.

The U.S. Department of Energy's Office of Scientific and Technical Information. Anderson Localization in Degenerate Spin-Orbit Coupled Fermi Gas with Disorder Sci Rep. 2016 Mar 3;6:22623. doi: 10.1038/srep22623.... In the large disorder limits, the increase of the strength of spin- orbit coupling will increase the mean superconducting order parameter. This phenomenon shows that the system is more insensitive to disorder.

Spin-Injection Spectroscopyof a Spin-Orbit Coupled Fermi Gas.

We briefly review recent progress on ultracold atomic Fermi gases with different types of synthetic spin–orbit coupling, including the one–dimensional (1D) equal weight Rashba–Dresselhaus and two-dimensional (2D) Rasbha spin–orbit couplings. Theoretically, we show how the single-body, two-body and many-body properties of Fermi gases are. Nov 04, 2011 · In this Letter we study both ground state properties and the superfluid transition temperature of a spin-1/2 Fermi gas across a Feshbach resonance with a synthetic spin-orbit coupling, using the mean-field theory and the exact solution of two-body problem. We show that a strong spin-orbit coupling c. 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.

[PDF] Spin dynamics in a spin-orbit-coupled Fermi gas.

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 coupling analytically, and derive expressions for the dynamics of an arbitrary initial spin state. A relatively long-lived spin-orbit-coupled Fermi gas, readily being realized with a narrow optical transition, allows to explore a single-minimum dispersion where three minima of spin-1 system merge into and to monitor collective dipole modes of fermions in the strong coupling regime. The measured oscillation frequency of the dipole mode is.