Electron-assisted magnetization tunneling in single spin systems

The process of amplification of a single spin state using nuclear magnetic resonance (NMR) techniques in a rotating frame is considered. Our main aim is to investigate the efficiency of various schemes for quantum detection. Results of numerical simulation of the time dependence of individual and total nuclear polarizations for 1D, 2D, and 3D configurations of the spin systems are presented.

Download Full-text

Excitations for lattice ferromagnetic classical spin systems at high temperature: Noneven single-spin distributions

Physical Review E ◽

10.1103/physreve.61.6156 ◽

2000 ◽

Vol 61 (6) ◽

pp. 6156-6164 ◽

Cited By ~ 3

Author(s):

Ricardo S. Schor ◽

Michael O’Carroll

Keyword(s):

High Temperature ◽

Spin Systems ◽

Classical Spin ◽

Single Spin ◽

Spin Distributions

Download Full-text

GENUINE CORRELATIONS IN FINITE-SIZE SPIN SYSTEMS

International Journal of Modern Physics B ◽

10.1142/s0217979213450343 ◽

2012 ◽

Vol 27 (01n03) ◽

pp. 1345034 ◽

Cited By ~ 3

Author(s):

GIAN LUCA GIORGI ◽

THOMAS BUSCH

Keyword(s):

Magnetic Field ◽

Ground State ◽

Low Temperatures ◽

Finite Size ◽

Spin Systems ◽

Spin States ◽

Single Spin ◽

Thermodynamical Limit ◽

Applied External Magnetic Field ◽

Parity Change

Genuine multipartite correlations in finite-size XY chains are studied as a function of the applied external magnetic field. We find that, for low temperatures, multipartite correlations are sensitive to the parity change in the Hamiltonian ground state, given that they exhibit a minimum every time that the ground state becomes degenerate. This implies that they can be used to detect the factorizing point, that is, the value of the external field such that, in the thermodynamical limit, the ground state becomes the tensor product of single-spin states.

Download Full-text

Local reachability of stochastic quantum dynamics with application to feedback control of single-spin systems

Proceedings of the 44th IEEE Conference on Decision and Control ◽

10.1109/cdc.2005.1583491 ◽

2006 ◽

Cited By ~ 3

Author(s):

N. Yamamoto ◽

H. Machida ◽

K. Tsumura ◽

S. Hara

Keyword(s):

Feedback Control ◽

Quantum Dynamics ◽

Spin Systems ◽

Single Spin

Download Full-text

Optimizing the spin sensitivity of grain boundary junction nanoSQUIDs—towards detection of small spin systems with single-spin resolution

Superconductor Science and Technology ◽

10.1088/0953-2048/27/12/125007 ◽

2014 ◽

Vol 27 (12) ◽

pp. 125007 ◽

Cited By ~ 20

Author(s):

R Wölbing ◽

T Schwarz ◽

B Müller ◽

J Nagel ◽

M Kemmler ◽

...

Keyword(s):

Grain Boundary ◽

Spin Systems ◽

Single Spin

Download Full-text

Observation of parity-time symmetry breaking in a single-spin system

Science ◽

10.1126/science.aaw8205 ◽

2019 ◽

Vol 364 (6443) ◽

pp. 878-880 ◽

Cited By ~ 58

Author(s):

Yang Wu ◽

Wenquan Liu ◽

Jianpei Geng ◽

Xingrui Song ◽

Xiangyu Ye ◽

...

Keyword(s):

Quantum Systems ◽

Spin Systems ◽

Nitrogen Vacancy ◽

Single Quantum ◽

Single Spin ◽

Classical Systems ◽

Time Symmetry ◽

Nitrogen Vacancy Center ◽

Quantum Sensing ◽

Vacancy Center

Steering the evolution of single spin systems is crucial for quantum computing and quantum sensing. The dynamics of quantum systems has been theoretically investigated with parity-time–symmetric Hamiltonians exhibiting exotic properties. Although parity-time symmetry has been explored in classical systems, its observation in a single quantum system remains elusive. We developed a method to dilate a general parity-time–symmetric Hamiltonian into a Hermitian one. The quantum state evolutions ranging from regions of unbroken to broken PT symmetry have been observed with a single nitrogen-vacancy center in diamond. Owing to the universality of the dilation method, our result provides a route for further exploiting and understanding the exotic properties of parity-time symmetric Hamiltonian in quantum systems.

Download Full-text