STEADY-STATE SPIN DENSITIES AND CURRENTS

نویسندگان

چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Quantum Computing with Steady State Spin Currents

Sutton, Brian M. M.S.E.C.E., Purdue University, December 2013. Quantum Computing with Steady State Spin Currents. Major Professor: Supriyo Datta. Many approaches to quantum computing use spatially confined qubits in the presence of dynamic fields to perform computation. These approaches are contrasted with proposals using mobile qubits in the presence of static fields. In this thesis, steady st...

متن کامل

Spin susceptibilities, spin densities, and their connection to spin currents

We calculate the frequency-dependent spin susceptibilities for a two-dimensional electron gas with both Rashba and Dresselhaus spin-orbit interactions. The resonances of the susceptibilities depend on the relative values of the Rashba and Dresselhaus spin-orbit constants, which could be manipulated by gate voltages. We derive exact continuity equations, with source terms, for the spin density a...

متن کامل

Steady-state currents in sharp stochastic ratchets.

We develop and analyze a model for particle transport in a stochastic ratchet with a periodic piecewise linear potential, with diffusion coefficient D, where the force is discontinuous in position and fluctuating in time via additive telegraph noise with correlation time tau. We find asymptotic formulas for the steady-state particle current J for large and small D and tau. For example, for smal...

متن کامل

Spin Locked Steady-State Free Precession Imaging

Introduction: T1ρ MRI is typically performed by magnetization preparation followed by a readout sequence during which the T1ρ-weighted signal is frequency and phase encoded (1). This paradigm is inherently time inefficient and, instead, it might be desirable to continuously acquire the T1ρ-weighted signal in the steady-state. Unfortunately, it isn’t clear how to establish a steady-state T1ρ con...

متن کامل

Imaging periodic currents using alternating balanced steady-state free precession.

Existing functional brain MR imaging methods detect neuronal activity only indirectly via a surrogate signal such as deoxyhemoglobin concentration in the vascular bed of cerebral parenchyma. It has been recently proposed that neuronal currents may be measurable directly using MRI (ncMRI). However, limited success has been reported in neuronal current detection studies that used standard gradien...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: International Journal of Modern Physics B

سال: 2008

ISSN: 0217-9792,1793-6578

DOI: 10.1142/s021797920804911x