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Quantum Limits on Parameter Estimation
(2012-07-10)
We present a new proof of the quantum Cramer-Rao bound for precision parameter estimation and extend it to a more general class of measurement procedures. We analyze a generalized framework for parameter estimation that ...
Coupling Nitrogen-Vacancy Centers in Diamond in Superconducting Flux Qubits
(The American Physical Society, 2010)
We propose a method to achieve coherent coupling between nitrogen-vacancy (NV) centers in diamond and superconducting (SC) flux qubits. The resulting coupling can be used to create a coherent interaction between the spin ...
Magnetic Field Imaging with Nitrogen-Vacancy Ensembles
(Institute of Physics, 2011)
We demonstrate a method of imaging spatially varying magnetic fields using a thin layer of nitrogen-vacancy (NV) centers at the surface of a diamond chip. Fluorescence emitted by the two-dimensional NV ensemble is detected ...
Nuclear Spin Cooling Using Overhauser-Field Selective Coherent Population Trapping
(American Physical Society, 2010)
We show that a quantum interference effect in optical absorption from two electronic spin states of a solid-state emitter can be used to prepare the surrounding environment of nuclear spins in well-defined states, thereby ...
Characterization of Topological States on a Lattice with Chern Number
(Institute of Physics, 2008)
We study Chern numbers to characterize the ground state of strongly interacting systems on a lattice. This method allows us to perform a numerical characterization of bosonic fractional quantum Hall (FQH) states on a lattice ...
Enhanced Antiferromagnetic Exchange between Magnetic Impurities in a Superconducting Host
(American Physical Society (APS), 2014)
It is generally believed that superconductivity only weakly affects the indirect exchange between
magnetic impurities. If the distance r between impurities is smaller than than the superconducting
coherence length \((r ...
Hybrid Quantum Devices and Quantum Engineering
(IOP Science, 2009)
We discuss prospects of building hybrid quantum devices involving elements of atomic and
molecular physics, quantum optics and solid-state elements with the attempt to combine
advantages of the respective systems in ...
Quantum Repeater with Encoding
(American Physical Society, 2009)
We propose an approach to implement quantum repeaters for long-distance quantum communication. Our protocol generates a backbone of encoded Bell pairs and uses the procedure of classical error correction during simultaneous ...
Fast Entanglement Distribution with Atomic Ensembles and Fluorescent Detection
(American Physical Society, 2010)
Quantum repeaters based on atomic ensemble quantum memories are promising candidates for achieving scalable distribution of entanglement over long distances. Recently, important experimental progress has been made toward ...
Coherent Quantum Optical Control with Subwavelength Resolution
(American Physical Society, 2008)
We suggest a new method for quantum optical control with nanoscale resolution. Our method allows for coherent far-field manipulation of individual quantum systems with spatial selectivity that is not limited by the wavelength ...