A5049596670- Diamond and Carbon-based Materials Research
- Advanced Frequency and Time Standards
- Atomic and Subatomic Physics Research
- Cold Atom Physics and Bose-Einstein Condensates
- High-pressure geophysics and materials
- Electronic and Structural Properties of Oxides
- Force Microscopy Techniques and Applications
- Mechanical and Optical Resonators
- Quantum Information and Cryptography
- Quantum and electron transport phenomena
- Advanced Surface Polishing Techniques
- Quantum Computing Algorithms and Architecture
- Quantum optics and atomic interactions
- Semiconductor materials and devices
- Advanced Fiber Laser Technologies
- Pulsars and Gravitational Waves Research
- Advanced Materials Characterization Techniques
- Astrophysics and Cosmic Phenomena
- Metal and Thin Film Mechanics
- Analytical Chemistry and Sensors
- Cardiovascular Syncope and Autonomic Disorders
- Dark Matter and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Semiconductor Quantum Structures and Devices
- Gamma-ray bursts and supernovae
University of California, Berkeley
2023-2025
University of Wisconsin–Madison
2019-2024
Lawrence Livermore National Laboratory
2022
Institute for Solid State Physics and Optics
2022
HUN-REN Wigner Research Centre for Physics
2022
Budapest University of Technology and Economics
2022
Pontificia Universidad Católica de Chile
2022
Princeton University
2021
University of California, Santa Barbara
2021
University of Chicago
2021
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 nanometer-scale dimensions, these forces harnessed enable coupling individual quantum systems. We demonstrate that the coherent evolution single electronic spin associated with nitrogen vacancy center in diamond coupled motion magnetized resonator. Coherent manipulation is used sense driven Brownian resonator under...
We propose a space-based gravitational wave detector consisting of two spatially separated, drag-free satellites sharing ultra-stable optical laser light over single baseline. Each satellite contains an lattice atomic clock, which serves as sensitive, narrowband the local frequency shared light. A synchronized two-clock comparison between will be sensitive to effective Doppler shifts induced by incident waves (GWs) at level competitive with other proposed GW detectors, while providing...
The gravitational-wave astronomical revolution began in 2015 with LIGO's observation of the coalescence two stellar-mass black holes. Over coming decades, ground-based detectors like laser interferometer observatory (LIGO), Virgo and KAGRA will extend their reach, discovering thousands binaries. In 2030s, space-based space antenna (LISA) enable observations massive holes galactic centres. Between observatories LISA lies unexplored dHz frequency band. Here, we show potential a decihertz (DO)...
Executing quantum algorithms on error-corrected logical qubits is a critical step for scalable computing, but the requisite numbers of and physical error rates are demanding current experimental hardware. Recently, development correcting codes tailored to particular noise models has helped relax these requirements. In this work, we propose qubit encoding gate protocol 171Yb neutral atom that converts dominant errors into erasures, is, in known locations. The key idea encode metastable...
We experimentally demonstrate the use of a single electronic spin to measure quantum dynamics distant individual nuclear spins from within surrounding bath. Our technique exploits coherent control electron spin, allowing us isolate and monitor weakly coupled spin. Specifically, we detect evolution 13C nitrogen vacancy centers in diamond lattice with hyperfine couplings down factor 8 below bare dephasing rate. Potential applications nanoscale magnetic resonance imaging information processing...
Thermally induced electrical currents, known as Johnson noise, cause fluctuating electric and magnetic fields in proximity to a conductor. These fluctuations are intrinsically related the conductivity of metal. We use single-spin qubits associated with nitrogen-vacancy centers diamond probe noise vicinity conductive silver films. Measurements polycrystalline films over range distances (20 200 nanometers) temperatures (10 300 kelvin) consistent classically expected behavior fluctuations....
The applications of spin-based quantum sensors to measurements probing fundamental physics are surveyed. Experimental methods and technologies developed for information science have rapidly advanced in recent years these tools enable increasingly precise control measurement spin dynamics. Theories beyond-the-standard-model predict, example, discrete-symmetry-violating electromagnetic moments correlated with particle spins, exotic spin-dependent forces, coupling spins ultralight bosonic...
Einstein's theory of general relativity predicts that a clock at higher gravitational potential will tick faster than an otherwise identical lower potential, effect known as the redshift. Here we perform laboratory-based, blinded test redshift using differential comparisons within evenly spaced array 5 atomic ensembles spanning height difference 1 cm. We measure fractional frequency gradient [ - 12.4 ± 0. 7(stat) 2. 5(sys)] × 10-19/cm, consistent with expected 10.9 10-19/cm. Our results can...
The last decade has seen unprecedented effort in dark matter model building at all mass scales coupled with the design of numerous new detection strategies. Transformative advances quantum technologies have led to a plethora high-precision sensors and strategies for ultralight ($<10\,$eV) bosonic that can be described by an oscillating classical, largely coherent field. This white paper focuses on searches wavelike scalar vector candidates.
Nitrogen vacancy (NV) centers in diamond are atom-scale defects with long spin coherence times that can be used to sense magnetic fields high sensitivity and spatial resolution. Typically, the field projection at a single point is measured by averaging many sequential measurements NV center, or distribution reconstructed taking average over an ensemble of centers. In single-NV center experiments, both techniques discard information. Here we propose implement new sensing modality, whereby two...
We present a concept for high-precision optical atomic clock (OAC) operating on an Earth-orbiting space station. This pathfinder science mission will compare the space-based OAC with one or more ultra-stable terrestrial OACs to search space-time-dependent signatures of dark scalar fields that manifest as anomalies in relative frequencies station-based and ground-based clocks. opens possibility probing models new physics are inaccessible purely experiments where field may potentially be...
Spin-lattice relaxation within the nitrogen-vacancy (NV) center's electronic ground-state spin triplet limits its coherence times, and thereby impacts performance in quantum applications. We report measurements of rates on NV |m_{s}=0⟩↔|m_{s}=±1⟩ |m_{s}=-1⟩↔|m_{s}=+1⟩ transitions as a function temperature from 9 to 474 K high-purity samples. show that dependencies are reproduced by an ab initio theory Raman scattering due second-order spin-phonon interactions, we discuss applicability other...
The dominant noise in an ``erasure qubit'' is erasure---a type of error whose occurrence and location can be detected. Erasure qubits have potential to reduce the overhead associated with fault tolerance. To date, research on erasure has primarily focused quantum computing networking applications. Here, we consider applicability sensing metrology. We show theoretically that, for same level noise, qubit acts as a more precise sensor or clock compared its nonerasure counterpart. experimentally...
The stability of an optical atomic clock is a critical figure merit for almost all applications. To this end, much research has focused on reducing instability by increasing the atom number, lengthening coherent interrogation times, and introducing entanglement to push beyond standard quantum limit. In work, we experimentally demonstrate alternative approach using phase estimation based individually controlled ensembles in strontium (Sr) lattice clock. We first joint Ramsey two spatially...
We study theoretically the measurement of a mechanical oscillator using single two-level system as detector. In recent experiment, we used electronic spin associated with nitrogen–vacancy center in diamond to probe thermal motion magnetized cantilever at room temperature (Kolkowitz et al 2012 Science 335 1603). Here, present detailed analysis sensitivity limits this technique, well possibility measure zero-point oscillator. Further, discuss issue backaction sequential measurements and find...
Since 2015 the gravitational-wave observations of LIGO and Virgo have transformed our understanding compact-object binaries. In years to come, ground-based observatories such as LIGO, Virgo, their successors will increase in sensitivity, discovering thousands stellar-mass 2030s, space-based LISA provide massive black holes Between $\sim 10$-$10^3~\mathrm{Hz}$ band $\sim10^{-4}$-$10^{-1}~\mathrm{Hz}$ lies uncharted decihertz band. We propose a Decihertz Observatory study this frequency range,...