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Dive into the research topics where Dmitry Budker is active.

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Featured researches published by Dmitry Budker.


Physical Review Letters | 2015

Search for Ultralight Scalar Dark Matter with Atomic Spectroscopy.

Van Tilburg K; N. Leefer; Lykourgos Bougas; Dmitry Budker

We report new limits on ultralight scalar dark matter (DM) with dilatonlike couplings to photons that can induce oscillations in the fine-structure constant α. Atomic dysprosium exhibits an electronic structure with two nearly degenerate levels whose energy splitting is sensitive to changes in α. Spectroscopy data for two isotopes of dysprosium over a two-year span are analyzed for coherent oscillations with angular frequencies below 1  rad s-1. No signal consistent with a DM coupling is identified, leading to new constraints on dilatonlike photon couplings over a wide mass range. Under the assumption that the scalar field comprises all of the DM, our limits on the coupling exceed those from equivalence-principle tests by up to 4 orders of magnitude for masses below 3×10(-18)  eV. Excess oscillatory power, inconsistent with fine-structure variation, is detected in a control channel, and is likely due to a systematic effect. Our atomic spectroscopy limits on DM are the first of their kind, and leave substantial room for improvement with state-of-the-art atomic clocks.


Nature Physics | 2008

High-sensitivity diamond magnetometer with nanoscale resolution

Jacob M. Taylor; Paola Cappellaro; L. Childress; Liang Jiang; Dmitry Budker; P. R. Hemmer; Amir Yacoby; Ronald L. Walsworth; Mikhail D. Lukin

Impurity centres in diamond have recently attracted attention in the context of quantum information processing. Now their use as magnetic-field sensors is explored, promising a fresh approach to single-spin detection and magnetic-field imaging at the nanoscale.


Nature Physics | 2007

Optical magnetometry - eScholarship

Dmitry Budker; Michael Romalis

Some of the most sensitive methods of measuring magnetic fields use interactions of resonant light with atomic vapour. Recent developments in this vibrant field have led to improvements in sensitivity and other characteristics of atomic magnetometers, benefiting their traditional applications for measurements of geomagnetic anomalies and magnetic fields in space, and opening many new areas previously accessible only to magnetometers based on superconducting quantum interference devices. We review basic principles of modern optical magnetometers, discuss fundamental limitations on their performance, and describe recently explored applications for dynamical measurements of biomagnetic fields, detecting signals in NMR and MRI, inertial rotation sensing, magnetic microscopy with cold atoms, and tests of fundamental symmetries of nature.


Reviews of Modern Physics | 2002

Resonant nonlinear magneto-optical effects in atoms

Dmitry Budker; W. Gawlik; D. F. Kimball; S. M. Rochester; Valeriy V. Yashchuk; Antoine Weis

In this article, we review the history, current status, physical mechanisms, experimental methods, and applications of nonlinear magneto-optical effects in atomic vapors. We begin by describing the pioneering work of Macaluso and Corbino over a century ago on linear magneto-optical effects (in which the properties of the medium do not depend on the light power) in the vicinity of atomic resonances, and contrast these effects with various nonlinear magneto-optical phenomena that have been studied both theoretically and experimentally since the late 1960s. In recent years, the field of nonlinear magneto-optics has experienced a revival of interest that has led to a number of developments, including the observation of ultra-narrow (1-Hz) magneto-optical resonances, applications in sensitive magnetometry, nonlinear magneto-optical tomography, and the possibility of a search for parity- and time-reversal-invariance violation in atoms.


Physical Review B | 2009

Diamonds with a high density of nitrogen-vacancy centers for magnetometry applications

Victor M. Acosta; E. Bauch; Micah P. Ledbetter; Charles Santori; Kai Mei C Fu; Paul E. Barclay; R. G. Beausoleil; H. Linget; Jean-François Roch; François Treussart; S. Chemerisov; Wojciech Gawlik; Dmitry Budker

V. M. Acosta, E. Bauch, 2 M. P. Ledbetter, C. Santori, K.-M. C. Fu, P. E. Barclay, R. G. Beausoleil, H. Linget, J. F. Roch, F. Treussart, S. Chemerisov, W. Gawlik, and D. Budker 8, 9 1 Department of Physics, University of California, Berkeley, CA 94720-7300 2 Technische Universität Berlin, Hardenbergstraÿe 28, 10623 Berlin, Germany 3 Hewlett-Packard Laboratories, 1501 Page Mill Rd., Palo Alto, CA 94304 4 Ecole Normale Supérieure de Cachan, 61 Avenue du Président Wilson, 94235 Cachan CEDEX, France 5 Laboratoire de Photonique Quantique et Moléculaire (CNRS UMR 8537), Ecole Normale Supérieure de Cachan, 61 Avenue du Président Wilson, 94235 Cachan CEDEX, France 6 Argonne National Laboratory, Argonne, IL, 60439, U.S.A. 7 Center for Magneto-Optical Research, Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Kraków, Poland Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley CA 94720, USA [email protected] (Dated: July 31, 2009)


Nature Communications | 2013

Solid-state electronic spin coherence time approaching one second

Nir Bar-Gill; Linh Pham; Andrejs Jarmola; Dmitry Budker; Ronald L. Walsworth

Solid-state spin systems such as nitrogen-vacancy colour centres in diamond are promising for applications of quantum information, sensing and metrology. However, a key challenge for such solid-state systems is to realize a spin coherence time that is much longer than the time for quantum spin manipulation protocols. Here we demonstrate an improvement of more than two orders of magnitude in the spin coherence time (T₂) of nitrogen-vacancy centres compared with previous measurements: T₂≈0.6 s at 77 K. We employed dynamical decoupling pulse sequences to suppress nitrogen-vacancy spin decoherence, and found that T₂ is limited to approximately half of the longitudinal spin relaxation time over a wide range of temperatures, which we attribute to phonon-induced decoherence. Our results apply to ensembles of nitrogen-vacancy spins, and thus could advance quantum sensing, enable squeezing and many-body entanglement, and open a path to simulating driven, interaction-dominated quantum many-body Hamiltonians.


Physical Review Letters | 2010

Temperature dependence of the nitrogen-vacancy magnetic resonance in diamond.

V. M. Acosta; Erik Bauch; M. P. Ledbetter; A. Waxman; Louis-S. Bouchard; Dmitry Budker

The temperature dependence of the magnetic-resonance spectra of nitrogen-vacancy (NV-) ensembles in the range of 280-330 K was studied. Four samples prepared under different conditions were analyzed with NV- concentrations ranging from 10 ppb to 15 ppm. For all samples, the axial zero-field splitting (ZFS) parameter D was found to vary significantly with temperature, T, as dD/dT=-74.2(7) kHz/K. The transverse ZFS parameter E was nonzero (between 4 and 11 MHz) in all samples, and exhibited a temperature dependence of dE/(EdT)=-1.4(3)x10{-4} K-1. The results might be accounted for by considering local thermal expansion. The temperature dependence of the ZFS parameters presents a significant challenge for diamond magnetometers and may ultimately limit their bandwidth and sensitivity.


Proceedings of the National Academy of Sciences of the United States of America | 2006

Magnetic resonance imaging with an optical atomic magnetometer.

Shoujun Xu; Valeriy V. Yashchuk; Marcus H. Donaldson; S. M. Rochester; Dmitry Budker; Alexander Pines

We report an approach for the detection of magnetic resonance imaging without superconducting magnets and cryogenics: optical atomic magnetometry. This technique possesses a high sensitivity independent of the strength of the static magnetic field, extending the applicability of magnetic resonance imaging to low magnetic fields and eliminating imaging artifacts associated with high fields. By coupling with a remote-detection scheme, thereby improving the filling factor of the sample, we obtained time-resolved flow images of water with a temporal resolution of 0.1 s and spatial resolutions of 1.6 mm perpendicular to the flow and 4.5 mm along the flow. Potentially inexpensive, compact, and mobile, our technique provides a viable alternative for MRI detection with substantially enhanced sensitivity and time resolution for various situations where traditional MRI is not optimal.


Physical Review Letters | 2012

Temperature and magnetic field dependent longitudinal spin relaxation in nitrogen-vacancy ensembles in diamond

A. Jarmola; Victor M. Acosta; Kasper Jensen; S. Chemerisov; Dmitry Budker

We present an experimental study of the longitudinal electron-spin relaxation time (T1) of negatively charged nitrogen-vacancy (NV) ensembles in diamond. T1 was studied as a function of temperature from 5 to 475 K and magnetic field from 0 to 630 G for several samples with various NV and nitrogen concentrations. Our studies reveal three processes responsible for T1 relaxation. Above room temperature, a two-phonon Raman process dominates; below room temperature, we observe an Orbach-type process with an activation energy of 73(4) meV, which closely matches the local vibrational modes of the NV center. At yet lower temperatures, sample dependent cross-relaxation processes dominate, resulting in temperature independent values of T1 from milliseconds to minutes. The value of T1 in this limit depends sensitively on the magnetic field and can be tuned by more than 1 order of magnitude.


Physical Review A | 2008

Spin-Exchange-Relaxation-Free Magnetometry with Cs Vapor

Micah P. Ledbetter; I. M. Savukov; Victor M. Acosta; Dmitry Budker; Michael Romalis

We describe a Cs atomic magnetometer operating in the spin-exchange-relaxation-free (SERF) regime. With a vapor cell temperature of

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Valeriy V. Yashchuk

Lawrence Berkeley National Laboratory

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Alexander Pines

Lawrence Berkeley National Laboratory

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A. Jarmola

University of California

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D. F. Kimball

University of California

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N. Leefer

University of California

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