Spectroscopy of spontaneous spin noise as a probe of spin dynamics and magnetic resonance

  title={Spectroscopy of spontaneous spin noise as a probe of spin dynamics and magnetic resonance},
  author={Scott A. Crooker and Dwight G. Rickel and Alexander V. Balatsky and D. L. Smith},
Not all noise in experimental measurements is unwelcome. Certain fundamental noise sources contain valuable information about the system itself—a notable example being the inherent voltage fluctuations (Johnson noise) that exist across any resistor, which allow the temperature to be determined. In magnetic systems, fundamental noise can exist in the form of random spin fluctuations. For example, statistical fluctuations of N paramagnetic spins should generate measurable noise of order N spins… 
Measuring random spin fluctuations for perturbation-free probes of spin dynamics and magnetic resonance (Invited Paper)
Random spin fluctuations in an equilibrium ensemble of paramagnetic spins are shown to contain valuable information about the system itself. We use off-resonant Faraday rotation to passively and
Spin-noise spectroscopy of a noise-squeezed atomic state
Spin noise spectroscopy is emerging as a powerful technique for studying the dynamics of various spin systems also beyond their thermal equilibrium and linear response. Here, we study spin
Noise Detected NMR Spectroscopy
Spin noise phenomenon was predicted way back in 1946. However, experimental investigations regarding spin noise became possibleonly recently with major technological improvements in NMR
Stimulated spin noise in an activated crystal
In the spin noise spectroscopy, the magnetic susceptibility spectrum is known to be provided by the spin-system untouched by any external perturbation, or, better to say, disturbed only by its
Nonequilibrium spin noise spectroscopy on single quantum dots
All optical spin noise spectroscopy is typically used to extract the virtually undisturbed spin dynamics from measurements of spin fluctuations in thermal equilibrium. In this thesis, the method is
Spin noise spectroscopy: hole spin dynamics in semiconductor quantum dots
Spin noise spectroscopy can be an extraordinary efficient, all-optical and low-perturbing tool to study the equilibrium spin dynamics in semiconductors. However, great care is necessary for studying
Spin noise fluctuations from paramagnetic molecular adsorbates on surfaces
The measurement of spin noise in nuclei was demonstrated on bulk samples more than two decades ago. An ensemble of spins can produce a coherent signal at the Larmor frequency of a static magnetic
Single-shot measurement of transient nuclear magnetization with spin-noise spectroscopy in n-GaAs microcavities
We exploit spin noise spectroscopy (SNS) to directly observe build-up of dynamic nuclear polarization and relaxation of a perturbed nuclear spin-system to its equilibrium state in a single-shot
Spin-alignment noise in atomic vapor
In the conventional spin noise spectroscopy, the probe laser light monitors fluctuations of the spin orientation of a paramagnet revealed as fluctuations of its gyrotropy, i.e., circular


Detection and manipulation of statistical polarization in small spin ensembles.
A novel detection technique was employed that captures the statistical polarization and cycles it between states that are either locked or antilocked to the effective field in the rotating frame, and should be extendable to single electron spin detection.
Spontaneous noise spectroscopy of an atomic magnetic resonance
  • Mitsui
  • Physics
    Physical review letters
  • 2000
A new type of noise spectroscopy is demonstrated, which requires neither amplitude nor frequency noise of the light source and is attributed to the stochastic properties of the photon scattering which randomly interrupts the Larmor precession of the atomic magnetic moment.
Quantum Noise of an Atomic Spin Polarization Measurement
We explore the fundamental noise of the atomic spin measurement performed via polarization analysis of the probe light. The noise is shown to consist of the quantum noise of the probe and the quantum
Measurement and analysis of noise sources in giant magnetoresistive sensors up to 6 GHz
Describes the electrical and magnetic noise sources prevalent in giant magnetoresistive (GMR) sensors. At lower frequencies (<1 MHz), 1/f noise is generally dominant. Electrical (Nyquist-Johnson) and
White-noise magnetization fluctuations in magnetoresistive heads
Thermal magnetization fluctuations in magnetoresistive (MR) heads for magnetic hard-disk storage are a fundamental limit on their signal-to-noise ratio. The resultant noise is essentially frequency
Noise Spectroscopy of K Atoms with a Diode Laser
There has been much interest in the influence of the laser noise on the atomic system. So far theoretical works have been performed on calculation of the mean values and the variance of the
Quantum projection noise: Population fluctuations in two-level systems.
In the experiments described here, a single ion or a few identical ions were prepared in well-defined superpositions of two internal energy eigenstates, and the populations of the energy levels were measured.
Noise spectroscopy and interlayer phase coherence in bilayer quantum Hall systems.
It is argued here that interlayer current and charge-imbalance noise studies in bilayer quantum Hall systems will be able to address some of the key experimental questions.
Noise processes in nanomechanical resonators
Nanomechanical resonators can be fabricated to achieve high natural resonance frequencies, approaching 1 GHz, with quality factors in excess of 10^(4). These resonators are candidates for use as
The status of Johnson noise thermometry
Since Johnson's experimental observations of thermal noise in 1927, and Nyquist's explanation of the phenomenon shortly afterwards in 1928, thermal noise has attracted interest as a means of