Patents by Inventor Ronald L. Walsworth

Ronald L. Walsworth has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20200278414
    Abstract: A synchronized readout (SR) technique for spectrally selective detection of oscillating magnetic fields with sub-millihertz resolution, using coherent manipulation of solid state spins.
    Type: Application
    Filed: May 24, 2017
    Publication date: September 3, 2020
    Applicants: President and Fellows of Harvard College, President and Fellows of Harvard College
    Inventors: Ronald L. WALSWORTH, David GLENN, Dominik BUCHER
  • Patent number: 10101423
    Abstract: Methods and systems for Nuclear Magnetic Resonance (NMR) spectra of samples having unresolved peaks are described. The methods and systems allow for the creation nuclear spin singlet states in nearly-equivalent spin pairs, for example, using continuous spin-locking with a nutation frequency matched to the coupling strength between spins. The invention relates generally to the field Nuclear Magnetic Resonance (NMR). Nuclear magnetic resonance (NMR) spectroscopy can be used as a tool for determining the chemical structure and/or geometry of a molecule in a sample. In many samples, however, resonance frequencies of different nuclei fully or partially overlap, which makes chemical identification of molecule(s) in a sample difficult or impossible.
    Type: Grant
    Filed: March 3, 2014
    Date of Patent: October 16, 2018
    Assignee: President and Fellows of Harvard College
    Inventors: Stephen J. Devience, Ronald L. Walsworth, Matthew S. Rosen
  • Publication number: 20180113185
    Abstract: A system and method performing a medical imaging process includes arranging a subject to receive solution comprising nanodiamonds, performing an MRI imaging process to acquire data from the subject, and reconstructing the data to generate a report indicating a spatial distribution of nanodiamonds in the subject.
    Type: Application
    Filed: April 1, 2016
    Publication date: April 26, 2018
    Inventors: Matthew S. Rosen, Mathieu Sarracanie, Huiliang Zhang, David Riley, Ronald L. Walsworth, David Waddington
  • Patent number: 9939510
    Abstract: A solid state electronic spin system contains electronic spins disposed within a solid state lattice and coupled to an electronic spin bath and a nuclear spin bath, where the electronic spin bath composed of electronic spin impurities and the nuclear spin bath composed of nuclear spin impurities. The concentration of nuclear spin impurities in the nuclear spin bath is controlled to a value chosen so as to allow the nuclear spin impurities to effect a suppression of spin fluctuations and spin decoherence caused by the electronic spin bath. Sensing devices such as magnetic field detectors can exploit such a spin bath suppression effect, by applying optical radiation to the electronic spins for initialization and readout, and applying RF pulses to dynamically decouple the electronic spins from the electronic spin bath and the nuclear spin bath.
    Type: Grant
    Filed: October 22, 2017
    Date of Patent: April 10, 2018
    Assignee: PRESIDENT AND FELLOWS OF HARVARD COLLEGE
    Inventors: Ronald L. Walsworth, Nir Bar-Gill, Chinmay Belthangady, Linh My Pham
  • Publication number: 20180074149
    Abstract: A solid state electronic spin system contains electronic spins disposed within a solid state lattice and coupled to an electronic spin bath and a nuclear spin bath, where the electronic spin bath composed of electronic spin impurities and the nuclear spin bath composed of nuclear spin impurities. The concentration of nuclear spin impurities in the nuclear spin bath is controlled to a value chosen so as to allow the nuclear spin impurities to effect a suppression of spin fluctuations and spin decoherence caused by the electronic spin bath. Sensing devices such as magnetic field detectors can exploit such a spin bath suppression effect, by applying optical radiation to the electronic spins for initialization and readout, and applying RF pulses to dynamically decouple the electronic spins from the electronic spin bath and the nuclear spin bath.
    Type: Application
    Filed: October 22, 2017
    Publication date: March 15, 2018
    Applicant: PRESIDENT AND FELLOWS OF HARVARD COLLEGE
    Inventors: RONALD L. WALSWORTH, NIR BAR-GILL, CHINMAY BELTHANGADY, LINH MY PHAM
  • Patent number: 9891297
    Abstract: Systems and methods for magnetic sensing and imaging include a sensor having a network of isolated electron-spin quantum bits (qubits) disposed on the surface of the sensor; and a solid state electronic spin system disposed below the surface of the sensor, wherein the solid state electronic spin system has a spin-state dependent fluorescence; a source of light; a source of first external perturbation, wherein the source of first external perturbation generates a magnetic field; a source of second external perturbation; wherein, the source of light and the first and second external perturbations are configured to coherently and independently manipulate the spin states of at least one qubit and at least one solid state electronic spin system; and a detector to optically measure the solid-state electronic spins spin-state dependent fluorescence.
    Type: Grant
    Filed: March 13, 2015
    Date of Patent: February 13, 2018
    Assignee: President and Fellows of Harvard College
    Inventors: Alexander Sushkov, Igor Lovchinsky, Nicholas Chisholm, Ronald L. Walsworth, Hongkun Park, Mikhail D. Lukin
  • Patent number: 9829557
    Abstract: A solid state electronic spin system contains electronic spins disposed within a solid state lattice and coupled to an electronic spin bath and a nuclear spin bath, where the electronic spin bath composed of electronic spin impurities and the nuclear spin bath composed of nuclear spin impurities. The concentration of nuclear spin impurities in the nuclear spin bath is controlled to a value chosen so as to allow the nuclear spin impurities to effect a suppression of spin fluctuations and spin decoherence caused by the electronic spin bath. Sensing devices such as magnetic field detectors can exploit such a spin bath suppression effect, by applying optical radiation to the electronic spins for initialization and readout, and applying RF pulses to dynamically decouple the electronic spins from the electronic spin bath and the nuclear spin bath.
    Type: Grant
    Filed: June 28, 2017
    Date of Patent: November 28, 2017
    Assignee: PRESIDENT AND FELLOWS OF HARVARD COLLEGE
    Inventors: Ronald L. Walsworth, Nir Bar-Gill, Chinmay Belthangady, Linh My Pham
  • Patent number: 9804239
    Abstract: Methods and systems for Nuclear Magnetic Resonance (NMR) spectra of complex chemical mixtures are described. The methods and systems allow undesired NMR spectral background to be removed or suppressed and target spectral peaks to be uncovered, for example, when strong background signals overlap weaker peaks. In some embodiments, the methods and systems employ a quantum filter utilizing nuclear spin singlet states.
    Type: Grant
    Filed: February 28, 2013
    Date of Patent: October 31, 2017
    Assignee: President and Fellows of Harvard College
    Inventors: Ronald L. Walsworth, Stephen J. Devience, Matthew S. Rosen
  • Publication number: 20170299664
    Abstract: A solid state electronic spin system contains electronic spins disposed within a solid state lattice and coupled to an electronic spin bath and a nuclear spin bath, where the electronic spin bath composed of electronic spin impurities and the nuclear spin bath composed of nuclear spin impurities. The concentration of nuclear spin impurities in the nuclear spin bath is controlled to a value chosen so as to allow the nuclear spin impurities to effect a suppression of spin fluctuations and spin decoherence caused by the electronic spin bath. Sensing devices such as magnetic field detectors can exploit such a spin bath suppression effect, by applying optical radiation to the electronic spins for initialization and readout, and apply-ing RF pulses to dynamically decouple the electronic spins from the electronic spin bath and the nuclear spin bath.
    Type: Application
    Filed: June 28, 2017
    Publication date: October 19, 2017
    Applicant: PRESIDENT AND FELLOWS OF HARVARD COLLEGE
    Inventors: RONALD L. WALSWORTH, NIR BAR-GILL, CHINMAY BELTHANGADY, LINH MY PHAM
  • Patent number: 9720067
    Abstract: A solid state electronic spin system contains electronic spins disposed within a solid state lattice and coupled to an electronic spin bath and a nuclear spin bath, where the electronic spin bath composed of electronic spin impurities and the nuclear spin bath composed of nuclear spin impurities. The concentration of nuclear spin impurities in the nuclear spin bath is controlled to a value chosen so as to allow the nuclear spin impurities to effect a suppression of spin fluctuations and spin decoherence caused by the electronic spin bath. Sensing devices such as magnetic field detectors can exploit such a spin bath suppression effect, by applying optical radiation to the electronic spins for initialization and readout, and applying RF pulses to dynamically decouple the electronic spins from the electronic spin bath and the nuclear spin bath.
    Type: Grant
    Filed: November 30, 2012
    Date of Patent: August 1, 2017
    Assignee: PRESIDENT AND FELLOWS OF HARVARD COLLEGE
    Inventors: Ronald L. Walsworth, Nir Bar-Gill, Chinmay Belthangady, Linh My Pham
  • Publication number: 20160266220
    Abstract: Systems and methods for magnetic sensing and imaging include a sensor having a network of isolated electron-spin quantum bits (qubits) disposed on the surface of the sensor; and a solid state electronic spin system disposed below the surface of the sensor, wherein the solid state electronic spin system has a spin-state dependent fluorescence; a source of light; a source of first external perturbation, wherein the source of first external perturbation generates a magnetic field; a source of second external perturbation; wherein, the source of light and the first and second external perturbations are configured to coherently and independently manipulate the spin states of at least one qubit and at least one solid state electronic spin system; and a detector to optically measure the solid-state electronic spins spin-state dependent fluorescence.
    Type: Application
    Filed: March 13, 2015
    Publication date: September 15, 2016
    Inventors: Alexander SUSHKOV, Igor LOVCHINSKY, Nicholas CHISHOLM, Ronald L. WALSWORTH, Hongkun PARK, Mikhail D. LUKIN
  • Publication number: 20160041241
    Abstract: Methods and systems for Nuclear Magnetic Resonance (NMR) spectra of samples having unresolved peaks are described. The methods and systems allow for the creation nuclear spin singlet states in nearly-equivalent spin pairs, for example, using continuous spin-locking with a nutation frequency matched to the coupling strength between spins. The invention relates generally to the field Nuclear Magnetic Resonance (NMR). Nuclear magnetic resonance (NMR) spectroscopy can be used as a tool for determining the chemical structure and/or geometry of a molecule in a sample. In many samples, however, resonance frequencies of different nuclei fully or partially overlap, which makes chemical identification of molecule(s) in a sample difficult or impossible.
    Type: Application
    Filed: March 3, 2014
    Publication date: February 11, 2016
    Applicant: PRESIDENT AND FELLOWS OF HARVARD COLLEGE
    Inventors: Stephen J. DEVIENCE, Ronald L. WALSWORTH, Matthew S. ROSEN
  • Publication number: 20150042331
    Abstract: Methods and systems for Nuclear Magnetic Resonance (NMR) spectra of complex chemical mixtures are described. The methods and systems allow undesired NMR spectral background to be removed or suppressed and target spectral peaks to be uncovered, for example, when strong background signals overlap weaker peaks. In some embodiments, the methods and systems employ a quantum filter utilizing nuclear spin singlet states.
    Type: Application
    Filed: February 28, 2013
    Publication date: February 12, 2015
    Applicant: PRESIDENT AND FELLOWS OF HARVARD COLLEGE
    Inventors: Ronald L. Walsworth, Stephen J. Devience, Matthew S. Rosen
  • Patent number: 8947080
    Abstract: A magnetometer for sensing a magnetic field may include a solid state electronic spin system, and a detector. The solid state electronic spin system may contain one or more electronic spins that are disposed within a solid state lattice, for example NV centers in diamond. The electronic spins may be configured to receive optical excitation radiation and to align with the magnetic field in response thereto. The electronic spins may be further induced to precess about the magnetic field to be sensed, in response to an external control such as an RF field, the frequency of the spin precession being linearly related to the magnetic field by the Zeeman shift of the electronic spin energy levels. The detector may be configured to detect output optical radiation from the electronic spin, so as to determine the Zeeman shift and thus the magnetic field.
    Type: Grant
    Filed: December 3, 2008
    Date of Patent: February 3, 2015
    Assignee: President and Fellows of Harvard College
    Inventors: Mikhail Lukin, Ronald L. Walsworth
  • Publication number: 20140306707
    Abstract: A solid state electronic spin system contains electronic spins disposed within a solid state lattice and coupled to an electronic spin bath and a nuclear spin bath, where the electronic spin bath composed of electronic spin impurities and the nuclear spin bath composed of nuclear spin impurities. The concentration of nuclear spin impurities in the nuclear spin bath is controlled to a value chosen so as to allow the nuclear spin impurities to effect a suppression of spin fluctuations and spin decoherence caused by the electronic spin bath. Sensing devices such as magnetic field detectors can exploit such a spin bath suppression effect, by applying optical radiation to the electronic spins for initialization and readout, and applying RF pulses to dynamically decouple the electronic spins from the electronic spin bath and the nuclear spin bath.
    Type: Application
    Filed: November 30, 2012
    Publication date: October 16, 2014
    Applicant: PRESIDENT AND FELLOWS OF HARVARD COLLEGE
    Inventors: Ronald L. Walsworth, Nir Bar-Gill, Chinmay Belthangady, Linh My Pham
  • Patent number: 8547090
    Abstract: A method is disclosed for increasing the sensitivity of a solid state electronic spin based magnetometer that makes use of individual electronic spins or ensembles of electronic spins in a solid-state lattice, for example NV centers in a diamond lattice. The electronic spins may be configured to undergo a Zeeman shift in energy level when photons of light are applied to the electronic spins followed by pulses of an RF field that is substantially transverse to the magnetic field being detected. The method may include coherently controlling the electronic spins by applying to the electronic spins a sequence of RF pulses that dynamically decouple the electronic spins from mutual spin-spin interactions and from interactions with the lattice. The sequence of RF pulses may be a Hahn spin-echo sequence, a Can Purcell Meiboom Gill sequence, or a MREV8 pulse sequence, by way of example.
    Type: Grant
    Filed: December 3, 2008
    Date of Patent: October 1, 2013
    Assignee: President and Fellows of Harvard College
    Inventors: Mikhail D. Lukin, Ronald L. Walsworth, Amir Yacoby, Paola Cappellaro, Jacob M. Taylor, Liang Jiang, Lilian Childress
  • Publication number: 20100315079
    Abstract: A method is disclosed for increasing the sensitivity of a solid state electronic spin based magnetometer that makes use of individual electronic spins or ensembles of electronic spins in a solid-state lattice, for example NV centers in a diamond lattice. The electronic spins may be configured to undergo a Zeeman shift in energy level when photons of light are applied to the electronic spins followed by pulses of an RF field that is substantially transverse to the magnetic field being detected. The method may include coherently controlling the electronic spins by applying to the electronic spins a sequence of RF pulses that dynamically decouple the electronic spins from mutual spin-spin interactions and from interactions with the lattice. The sequence of RF pulses may be a Hahn spin-echo sequence, a Can Purcell Meiboom Gill sequence, or a MREV8 pulse sequence, by way of example.
    Type: Application
    Filed: December 3, 2008
    Publication date: December 16, 2010
    Applicant: PRESIDENT AND FELLOWS OF HARVARD COLLEGE
    Inventors: Mikhail Lukin, Ronald L. Walsworth, Amir Yacoby, Paola Capellaro, Jake Taylor, Liang Jiang, Lillian Childress
  • Publication number: 20100308813
    Abstract: A magnetometer for sensing a magnetic field may include a solid state electronic spin system, and a detector. The solid state electronic spin system may contain one or more electronic spins that are disposed within a solid state lattice, for example NV centers in diamond. The electronic spins may be configured to receive optical excitation radiation and to align with the magnetic field in response thereto. The electronic spins may be further induced to precess about the magnetic field to be sensed, in response to an external control such as an RF field, the frequency of the spin precession being linearly related to the magnetic field by the Zeeman shift of the electronic spin energy levels. The detector may be configured to detect output optical radiation from the electronic spin, so as to determine the Zeeman shift and thus the magnetic field.
    Type: Application
    Filed: December 3, 2008
    Publication date: December 9, 2010
    Applicant: PRESIDENT AND FELLOWS OF HARVARD COLLEGE
    Inventors: Mikhail Lukin, Ronald L. Walsworth
  • Publication number: 20080284429
    Abstract: The present invention generally relates to compositions, systems and methods for inducing nuclear hyperpolarization in imaging agents after they have been introduced into a subject.
    Type: Application
    Filed: December 11, 2006
    Publication date: November 20, 2008
    Applicant: The President and Fellows of Harvard College
    Inventors: Charles M. Marcus, Jacob W. Aptekar, Alexander C. Johnson, Ronald L. Walsworth