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).
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Patent number: 11519989Abstract: Devices for determining a state of a magnetic field-generating article are provided. In various embodiments, a device comprises: a single crystal diamond having a plurality of NV centers, the single crystal diamond configured to be disposed adjacent to a magnetic field-generating article, and configured to generate a fluorescent signal in response to being illuminated by a light source; a coherent light source configured to generate a light beam directed at the single crystal diamond; a microwave (MW) radiation source configured to irradiate the single crystal diamond with a MW signal; a magnetic field source configured to apply a bias magnetic field to the single crystal diamond; a photosensor configured to collect the fluorescent signal generated by the single crystal diamond; and a computing node operatively coupled to each of the coherent light source, the MW radiation source, the magnetic field source, and the photosensor.Type: GrantFiled: January 31, 2021Date of Patent: December 6, 2022Assignees: The MITRE Corporation, President and Fellows of Harvard CollegeInventors: Matthew James Turner, Edlyn Victoria Levine, Pauli Kehayias, Daniel T. Walters, Ronald L. Walsworth, Marko Loncar, Nicholas Ryan Langellier
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Patent number: 11156674Abstract: A method and system of measuring a direct current magnetic field using a plurality of spin centers are disclosed. A spin bath associated with the spin centers may be driven with a first source of electromagnetic radiation to reduce dephasing of the spin centers. The spin centers may be measured using double quantum (DQ) magnetometry in order to reduce the effects of crystal strain on spin dephasing times. An electromagnetic response of at least one of the plurality of spin centers may be observed using an electromagnetic radiation collection device. Accordingly, up to an eight times improvement in DC field sensitivity may be accomplished for a spin center ensemble.Type: GrantFiled: June 6, 2018Date of Patent: October 26, 2021Assignee: President and Fellows of Harvard CollegeInventors: Connor A. Hart, Erik Bauch, Ronald L. Walsworth, Matthew James Turner, Jennifer May Schloss, John Francis Barry
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Publication number: 20210239779Abstract: Devices for determining a state of a magnetic field-generating article are provided. In various embodiments, a device comprises: a single crystal diamond having a plurality of NV centers, the single crystal diamond configured to be disposed adjacent to a magnetic field-generating article, and configured to generate a fluorescent signal in response to being illuminated by a light source; a coherent light source configured to generate a light beam directed at the single crystal diamond; a microwave (MW) radiation source configured to irradiate the single crystal diamond with a MW signal; a magnetic field source configured to apply a bias magnetic field to the single crystal diamond; a photosensor configured to collect the fluorescent signal generated by the single crystal diamond; and a computing node operatively coupled to each of the coherent light source, the MW radiation source, the magnetic field source, and the photosensor.Type: ApplicationFiled: January 31, 2021Publication date: August 5, 2021Inventors: Matthew James TURNER, Edlyn Victoria LEVINE, Pauli KEHAYIAS, Daniel T. WALTERS, Ronald L. WALSWORTH, Marko LONCAR, Nicholas Ryan LANGELLIER
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Publication number: 20210080517Abstract: A method and system of improving T2* times for magnetic sensing using spin center ensembles is disclosed. The spin bath associated with the spin centers may be driven with a first source of electromagnetic radiation to reduce dephasing of the spin centers. The spin centers may be measured using double quantum (DQ) magnetometry in order to reduce the effects of crystal strain on T2*. Accordingly, up to an 8× improvement in DC field sensitivity may be accomplished for a spin center ensemble.Type: ApplicationFiled: June 6, 2018Publication date: March 18, 2021Inventors: Connor A. HART, Erik BAUCH, Ronald L. WALSWORTH, Matthew James TURNER, Jennifer May SCHLOSS, John Francis BARRY
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Patent number: 10901062Abstract: 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: GrantFiled: May 24, 2017Date of Patent: January 26, 2021Assignee: President and Fellows of Harvard CollegeInventors: Ronald L. Walsworth, David Glenn, Dominik Bucher
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Publication number: 20200278414Abstract: 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: ApplicationFiled: May 24, 2017Publication date: September 3, 2020Applicants: President and Fellows of Harvard College, President and Fellows of Harvard CollegeInventors: Ronald L. WALSWORTH, David GLENN, Dominik BUCHER
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Patent number: 10101423Abstract: 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: GrantFiled: March 3, 2014Date of Patent: October 16, 2018Assignee: President and Fellows of Harvard CollegeInventors: Stephen J. Devience, Ronald L. Walsworth, Matthew S. Rosen
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Publication number: 20180113185Abstract: 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: ApplicationFiled: April 1, 2016Publication date: April 26, 2018Inventors: Matthew S. Rosen, Mathieu Sarracanie, Huiliang Zhang, David Riley, Ronald L. Walsworth, David Waddington
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Patent number: 9939510Abstract: 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: GrantFiled: October 22, 2017Date of Patent: April 10, 2018Assignee: PRESIDENT AND FELLOWS OF HARVARD COLLEGEInventors: Ronald L. Walsworth, Nir Bar-Gill, Chinmay Belthangady, Linh My Pham
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Publication number: 20180074149Abstract: 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: ApplicationFiled: October 22, 2017Publication date: March 15, 2018Applicant: PRESIDENT AND FELLOWS OF HARVARD COLLEGEInventors: RONALD L. WALSWORTH, NIR BAR-GILL, CHINMAY BELTHANGADY, LINH MY PHAM
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Magnetic sensing and imaging using interactions between surface electron spins and solid state spins
Patent number: 9891297Abstract: 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: GrantFiled: March 13, 2015Date of Patent: February 13, 2018Assignee: President and Fellows of Harvard CollegeInventors: Alexander Sushkov, Igor Lovchinsky, Nicholas Chisholm, Ronald L. Walsworth, Hongkun Park, Mikhail D. Lukin -
Patent number: 9829557Abstract: 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: GrantFiled: June 28, 2017Date of Patent: November 28, 2017Assignee: PRESIDENT AND FELLOWS OF HARVARD COLLEGEInventors: Ronald L. Walsworth, Nir Bar-Gill, Chinmay Belthangady, Linh My Pham
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Patent number: 9804239Abstract: 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: GrantFiled: February 28, 2013Date of Patent: October 31, 2017Assignee: President and Fellows of Harvard CollegeInventors: Ronald L. Walsworth, Stephen J. Devience, Matthew S. Rosen
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Publication number: 20170299664Abstract: 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: ApplicationFiled: June 28, 2017Publication date: October 19, 2017Applicant: PRESIDENT AND FELLOWS OF HARVARD COLLEGEInventors: RONALD L. WALSWORTH, NIR BAR-GILL, CHINMAY BELTHANGADY, LINH MY PHAM
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Patent number: 9720067Abstract: 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: GrantFiled: November 30, 2012Date of Patent: August 1, 2017Assignee: PRESIDENT AND FELLOWS OF HARVARD COLLEGEInventors: Ronald L. Walsworth, Nir Bar-Gill, Chinmay Belthangady, Linh My Pham
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MAGNETIC SENSING AND IMAGING USING INTERACTIONS BETWEEN SURFACE ELECTRON SPINS AND SOLID STATE SPINS
Publication number: 20160266220Abstract: 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: ApplicationFiled: March 13, 2015Publication date: September 15, 2016Inventors: Alexander SUSHKOV, Igor LOVCHINSKY, Nicholas CHISHOLM, Ronald L. WALSWORTH, Hongkun PARK, Mikhail D. LUKIN -
Publication number: 20160041241Abstract: 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: ApplicationFiled: March 3, 2014Publication date: February 11, 2016Applicant: PRESIDENT AND FELLOWS OF HARVARD COLLEGEInventors: Stephen J. DEVIENCE, Ronald L. WALSWORTH, Matthew S. ROSEN
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Publication number: 20150042331Abstract: 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: ApplicationFiled: February 28, 2013Publication date: February 12, 2015Applicant: PRESIDENT AND FELLOWS OF HARVARD COLLEGEInventors: Ronald L. Walsworth, Stephen J. Devience, Matthew S. Rosen
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Patent number: 8947080Abstract: 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: GrantFiled: December 3, 2008Date of Patent: February 3, 2015Assignee: President and Fellows of Harvard CollegeInventors: Mikhail Lukin, Ronald L. Walsworth
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Publication number: 20140306707Abstract: 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: ApplicationFiled: November 30, 2012Publication date: October 16, 2014Applicant: PRESIDENT AND FELLOWS OF HARVARD COLLEGEInventors: Ronald L. Walsworth, Nir Bar-Gill, Chinmay Belthangady, Linh My Pham