Now showing items 1-20 of 182

• #### Adiabatic Preparation of Many-Body States in Optical Lattices ﻿

(American Physical Society, 2010)
We analyze a technique for the preparation of low-entropy many-body states of atoms in optical lattices based on adiabatic passage. In particular, we show that this method allows preparation of strongly correlated states ...
• #### Alkaline-Earth-Metal Atoms as Few-Qubit Quantum Registers ﻿

(American Physical Society, 2009)
We propose and analyze a novel approach to quantum information processing, in which multiple qubits can be encoded and manipulated using electronic and nuclear degrees of freedom associated with individual alkaline-earth ...
• #### All-Optical Initialization, Readout, and Coherent Preparation of Single Silicon-Vacancy Spins in Diamond ﻿

(American Physical Society (APS), 2014)
The silicon-vacancy (SiV−) color center in diamond has attracted attention because of its unique optical properties. It exhibits spectral stability and indistinguishability that facilitate efficient generation of photons ...
• #### All-Optical Sensing of a Single-Molecule Electron Spin ﻿

(American Chemical Society (ACS), 2014)
We demonstrate an all-optical method for magnetic sensing of individual molecules in ambient conditions at room temperature. Our approach is based on shallow nitrogen-vacancy (NV) centers near the surface of a diamond ...
• #### All-Optical Switch and Transistor Gated by One Stored Photon ﻿

(American Association for the Advancement of Science (AAAS), 2013)
The realization of an all-optical transistor, in which one “gate” photon controls a “source” light beam, is a long-standing goal in optics. By stopping a light pulse in an atomic ensemble contained inside an optical ...
• #### Atom-like crystal defects: From quantum computers to biological sensors ﻿

(AIP Publishing, 2014)
• #### Atomic-Scale Nuclear Spin Imaging Using Quantum-Assisted Sensors in Diamond ﻿

(American Physical Society (APS), 2015)
Nuclear spin imaging at the atomic level is essential for the understanding of fundamental biological phenomena and for applications such as drug discovery. The advent of novel nanoscale sensors promises to achieve the ...
• #### Attractive photons in a quantum nonlinear medium ﻿

(Springer Nature, 2013)
The fundamental properties of light derive from its constituent particles—massless quanta (photons) that do not interact with one another$^1$. However, it has long been known that the realization of coherent interactions ...
• #### Breakdown of the local density approximation in interacting systems of cold fermions in strongly anisotropic traps ﻿

(American Physical Society (APS), 2006)
We consider spin-polarized mixtures of cold fermionic atoms on the BEC side of the Feshbach resonance. We demonstrate that a strongly anisotropic confining potential can give rise to a double-peak structure in the axial ...
• #### 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 ...
• #### Coherence And Control Of Quantum Registers Based On Electronic Spin In A Nuclear Spin Bath ﻿

(American Physical Society, 2009)
We consider a protocol for the control of few-qubit registers comprising one electronic spin embedded in a nuclear spin bath. We show how to isolate a few proximal nuclear spins from the rest of the bath and use them as ...
• #### Coherence and Raman Sideband Cooling of a Single Atom in an Optical Tweezer ﻿

(American Physical Society, 2013)
We investigate quantum control of a single atom in a tightly focused optical tweezer trap. We show that inevitable spatially varying polarization gives rise to significant internal-state decoherence but that this effect ...
• #### Coherence of an Optically Illuminated Single Nuclear Spin Qubit ﻿

(American Physical Society, 2008)
We investigate the coherence properties of individual nuclear spin quantum bits in diamond [Dutt et al., Science, 316, 1312 (2007)] when a proximal electronic spin associated with a nitrogen-vacancy (NV) center is being ...
• #### Coherence of Nitrogen-Vacancy Electronic Spin Ensembles in Diamond ﻿

(American Physical Society, 2010)
We present an experimental and theoretical study of electronic spin decoherence in ensembles of nitrogen-vacancy (NV) color centers in bulk high-purity diamond at room temperature. Under appropriate conditions, we find ...
• #### Coherent control of diamond defects for quantum information science and quantum sensing ﻿

(2014-06-06)
Quantum mechanics, arguably one of the greatest achievements of modern physics, has not only fundamentally changed our understanding of nature but is also taking an ever increasing role in engineering. Today, the control ...
• #### Coherent Optical Transitions in Implanted Nitrogen Vacancy Centers ﻿

(American Chemical Society (ACS), 2014)
We report the observation of stable optical transitions in nitrogen-vacancy (NV) centers created by ion implantation. Using a combination of high temperature annealing and subsequent surface treatment, we reproducibly ...
• #### 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 ...
• #### Coherent Sensing of a Mechanical Resonator with a Single-Spin Qubit ﻿

(American Association for the Advancement of Science (AAAS), 2012)
Mechanical systems can be influenced by a wide variety of small forces, ranging from gravitational to optical, electrical, and magnetic. When mechanical resonators are scaled down to nanometer-scale dimensions, these forces ...
• #### Coherent, Mechanical Control of a Single Electronic Spin ﻿

(American Chemical Society (ACS), 2012)
We demonstrate coherent quantum control of a single spin driven by the motion of a mechanical resonator. The motion of a mechanical resonator is magnetically coupled to the electronic spin of a single nitrogen-vacancy ...
• #### Collectively Enhanced Interactions in Solid-State Spin Qubits ﻿

(American Physical Society (APS), 2013)
We propose and analyze a technique to collectively enhance interactions between solid-state quantum registers composed from random networks of spin qubits. In such systems, disordered dipolar interactions generically result ...