320 research outputs found
Magnetic Resonance Force Microscopy Measurement of Entangled Spin States
We simulate magnetic resonance force microscopy measurements of an entangled
spin state. One of the entangled spins drives the resonant cantilever
vibrations, while the other remote spin does not interact directly with the
quasiclassical cantilever. The Schr\"odinger cat state of the cantilever
reveals two possible outcomes of the measurement for both entangled spins.Comment: 3 pages RevTe
Spin Relaxation Caused by Thermal Excitations of High Frequency Modes of Cantilever Vibrations
We consider the process of spin relaxation in the oscillating
cantilever-driven adiabatic reversals technique in magnetic resonance force
microscopy. We simulated the spin relaxation caused by thermal excitations of
the high frequency cantilever modes in the region of the Rabi frequency of the
spin sub-system. The minimum relaxation time obtained in our simulations is
greater but of the same order of magnitude as one measured in recent
experiments. We demonstrated that using a cantilever with nonuniform
cross-sectional area may significantly increase spin relaxation time.Comment: 12 pages RevTe
Quantitative Determination of the Adiabatic Condition Using Force-Detected Nuclear Magnetic Resonance
The adiabatic condition governing cyclic adiabatic inversion of proton spins
in a micron-sized ammonium chloride crystal was studied using room temperature
nuclear magnetic resonance force microscopy. A systematic degradation of
signal-to-noise was observed as the adiabatic condition became violated. A
theory of adiabatic following applicable to cyclic adiabatic inversion is
reviewed and implemented to quantitatively determine an adiabaticity threshold
from our experimental results.Comment: 5 pages, 3 fig
A Modified Approach to Single-Spin Detection Using Magnetic Resonance Force Microscopy
The magnetic moment of a single spin interacting with a cantilever in
magnetic resonance force microscopy (MRFM) experiences quantum jumps in
orientation rather than smooth oscillations. These jumps cannot be detected by
a conventional MRFM based on observation of driven resonant oscillations of a
cantilever. In this paper, we propose a method which will allow detection of
the magnetic signal from a single spin using a modification of a conventional
MRFM. We estimate the opportunity to detect the magnetic signal from a single
proton.Comment: 4 pages LaTex, 4 figures in GIF forma
Stationary cantilever vibrations in the oscillating cantilever-driven adiabatic reversals -- magnetic resonance force microscopy technique
We consider theoretically the novel technique in magnetic resonance force
microscopy which is called ``oscillating cantilever-driven adiabatic
reversals''. We present analytical and numerical analysis for the stationary
cantilever vibrations in this technique. For reasonable values of parameters we
estimate the resonant frequency shift as 6Hz per the Bohr magneton. We analyze
also the regime of small oscillations of the paramagnetic moment near the
transversal plane and the frequency shift of the damped cantilever vibrations.Comment: 12 pages RevTex
A Magnetic Resonance Force Microscopy Quantum Computer with Tellurium Donors in Silicon
We propose a magnetic resonance force microscopy (MRFM)-based nuclear spin
quantum computer using tellurium impurities in silicon. This approach to
quantum computing combines the well-developed silicon technology with expected
advances in MRFM.Comment: 9 pages, 1 figur
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