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  1. Article ; Online: Quantum computing: how conditions created by the COVID-19 shutdown are delivering 'the best data we have ever seen'.

    Monroe, Christopher

    Nature

    2020  Volume 583, Issue 7814, Page(s) 10

    MeSH term(s) Algorithms ; COVID-19 ; Calibration ; Cloud Computing ; Computing Methodologies ; Coronavirus Infections/epidemiology ; Electromagnetic Fields ; Humans ; Ions ; Lasers ; Maryland ; Pandemics ; Pneumonia, Viral/epidemiology ; Quantum Theory ; Social Isolation ; Universities ; Vibration
    Chemical Substances Ions
    Keywords covid19
    Language English
    Publishing date 2020-06-30
    Publishing country England
    Document type Journal Article
    ZDB-ID 120714-3
    ISSN 1476-4687 ; 0028-0836
    ISSN (online) 1476-4687
    ISSN 0028-0836
    DOI 10.1038/d41586-020-01937-x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Programmable Quantum Simulations of Bosonic Systems with Trapped Ions.

    Katz, Or / Monroe, Christopher

    Physical review letters

    2023  Volume 131, Issue 3, Page(s) 33604

    Abstract: Trapped atomic ion crystals are a leading platform for quantum simulations of spin systems, with programmable and long-range spin-spin interactions mediated by excitations of phonons in the crystal. We describe a complementary approach for quantum ... ...

    Abstract Trapped atomic ion crystals are a leading platform for quantum simulations of spin systems, with programmable and long-range spin-spin interactions mediated by excitations of phonons in the crystal. We describe a complementary approach for quantum simulations of bosonic systems using phonons in trapped-ion crystals, here mediated by excitations of the trapped-ion spins. The scheme enables a high degree of programability across a dense graph of bosonic couplings, utilizing long-lived collective phonon modes in a trapped-ion chain. As such, it is well suited for tackling hard problems such as boson sampling and simulations of long-range bosonic and spin-boson Hamiltonians.
    Language English
    Publishing date 2023-08-04
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.131.033604
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Quantum computing

    Monroe, Christopher

    Nature

    how conditions created by the COVID-19 shutdown are delivering ‘the best data we have ever seen’

    2020  Volume 583, Issue 7814, Page(s) 10–10

    Keywords Multidisciplinary ; covid19
    Language English
    Publisher Springer Science and Business Media LLC
    Publishing country us
    Document type Article ; Online
    ZDB-ID 120714-3
    ISSN 1476-4687 ; 0028-0836
    ISSN (online) 1476-4687
    ISSN 0028-0836
    DOI 10.1038/d41586-020-01937-x
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Article ; Online: A Dynamical Systems Approach to Characterizing Brain-Body Interactions during Movement: Challenges, Interpretations, and Recommendations.

    Monroe, Derek C / Berry, Nathaniel T / Fino, Peter C / Rhea, Christopher K

    Sensors (Basel, Switzerland)

    2023  Volume 23, Issue 14

    Abstract: Brain-body interactions (BBIs) have been the focus of intense scrutiny since the inception of the scientific method, playing a foundational role in the earliest debates over the philosophy of science. Contemporary investigations of BBIs to elucidate the ... ...

    Abstract Brain-body interactions (BBIs) have been the focus of intense scrutiny since the inception of the scientific method, playing a foundational role in the earliest debates over the philosophy of science. Contemporary investigations of BBIs to elucidate the neural principles of motor control have benefited from advances in neuroimaging, device engineering, and signal processing. However, these studies generally suffer from two major limitations. First, they rely on interpretations of 'brain' activity that are behavioral in nature, rather than neuroanatomical or biophysical. Second, they employ methodological approaches that are inconsistent with a dynamical systems approach to neuromotor control. These limitations represent a fundamental challenge to the use of BBIs for answering basic and applied research questions in neuroimaging and neurorehabilitation. Thus, this review is written as a tutorial to address both limitations for those interested in studying BBIs through a dynamical systems lens. First, we outline current best practices for acquiring, interpreting, and cleaning scalp-measured electroencephalography (EEG) acquired during whole-body movement. Second, we discuss historical and current theories for modeling EEG and kinematic data as dynamical systems. Third, we provide worked examples from both canonical model systems and from empirical EEG and kinematic data collected from two subjects during an overground walking task.
    MeSH term(s) Humans ; Brain ; Electroencephalography/methods ; Brain Mapping/methods ; Walking ; Systems Analysis
    Language English
    Publishing date 2023-07-11
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2052857-7
    ISSN 1424-8220 ; 1424-8220
    ISSN (online) 1424-8220
    ISSN 1424-8220
    DOI 10.3390/s23146296
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  5. Article ; Online: N-Body Interactions between Trapped Ion Qubits via Spin-Dependent Squeezing.

    Katz, Or / Cetina, Marko / Monroe, Christopher

    Physical review letters

    2022  Volume 129, Issue 6, Page(s) 63603

    Abstract: We describe a simple protocol for the single-step generation of N-body entangling interactions between trapped atomic ion qubits. We show that qubit state-dependent squeezing operations and displacement forces on the collective atomic motion can generate ...

    Abstract We describe a simple protocol for the single-step generation of N-body entangling interactions between trapped atomic ion qubits. We show that qubit state-dependent squeezing operations and displacement forces on the collective atomic motion can generate full N-body interactions. Similar to the Mølmer-Sørensen two-body Ising interaction at the core of most trapped ion quantum computers and simulators, the proposed operation is relatively insensitive to the state of motion. We show how this N-body gate operation allows for the single-step implementation of a family of N-bit gate operations such as the powerful N-Toffoli gate, which flips a single qubit if and only if all other N-1 qubits are in a particular state.
    Language English
    Publishing date 2022-08-26
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.129.063603
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Ion trap with in-vacuum high numerical aperture imaging for a dual-species modular quantum computer.

    Carter, Allison L / O'Reilly, Jameson / Toh, George / Saha, Sagnik / Shalaev, Mikhail / Goetting, Isabella / Monroe, Christopher

    The Review of scientific instruments

    2024  Volume 95, Issue 3

    Abstract: Photonic interconnects between quantum systems will play a central role in both scalable quantum computing and quantum networking. Entanglement of remote qubits via photons has been demonstrated in many platforms; however, improving the rate of ... ...

    Abstract Photonic interconnects between quantum systems will play a central role in both scalable quantum computing and quantum networking. Entanglement of remote qubits via photons has been demonstrated in many platforms; however, improving the rate of entanglement generation will be instrumental for integrating photonic links into modular quantum computers. We present an ion trap system that has the highest reported free-space photon collection efficiency for quantum networking. We use a pair of in-vacuum aspheric lenses, each with a numerical aperture of 0.8, to couple 10(1)% of the 493 nm photons emitted from a 138Ba+ ion into single-mode fibers. We also demonstrate that proximal effects of the lenses on the ion position and motion can be mitigated.
    Language English
    Publishing date 2024-03-13
    Publishing country United States
    Document type Journal Article
    ZDB-ID 209865-9
    ISSN 1089-7623 ; 0034-6748
    ISSN (online) 1089-7623
    ISSN 0034-6748
    DOI 10.1063/5.0180732
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Successful Treatment of Central Pain and Spasticity in Patient With Multiple Sclerosis With Dorsal Column, Paresthesia-Free Spinal Cord Stimulator: A Case Report.

    Lam, Christopher M / Monroe, Brian R

    A&A practice

    2019  Volume 12, Issue 9, Page(s) 308–312

    Abstract: Non-paresthesia-free spinal cord stimulation (PF-SCS) has been successfully used in treating central pain syndromes in multiple sclerosis (MS) patients. However, the efficacy of PF-SCS in MS is unknown. Here, we present the case of an MS patient (13-year ...

    Abstract Non-paresthesia-free spinal cord stimulation (PF-SCS) has been successfully used in treating central pain syndromes in multiple sclerosis (MS) patients. However, the efficacy of PF-SCS in MS is unknown. Here, we present the case of an MS patient (13-year history) with late-stage disease. Her concomitant central pain and spasticity failed multiple attempts of medical management despite escalating multimodal pharmacological regimens. A trial and subsequent permanent placement of dorsal column spinal cord stimulator with paresthesia-free programming was successful in managing her central pain, illustrating a potential role of PF-SCS in treating patients with MS.
    MeSH term(s) Female ; Humans ; Middle Aged ; Multiple Sclerosis/complications ; Muscle Spasticity ; Neuralgia/etiology ; Neuralgia/therapy ; Pain Measurement ; Paralysis/therapy ; Spinal Cord Stimulation/instrumentation ; Treatment Outcome
    Language English
    Publishing date 2019-04-30
    Publishing country United States
    Document type Case Reports ; Journal Article
    ISSN 2575-3126
    ISSN (online) 2575-3126
    DOI 10.1213/XAA.0000000000000918
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Satellite ligand effects on magnetic exchange in dimers. A structural, magnetic and theoretical investigation of Cu

    Coetzee, Stefan / Turnbull, Mark M / Landee, Christopher P / Monroe, Jeffrey C / Deumal, Mercè / Novoa, Juan J / Rademeyer, Melanie

    Physical chemistry chemical physics : PCCP

    2023  Volume 25, Issue 13, Page(s) 9176–9187

    Abstract: Halide-bridged polymers have gained significant interest due to their diverse properties and potential applications. Stacked ... ...

    Abstract Halide-bridged polymers have gained significant interest due to their diverse properties and potential applications. Stacked Cu
    Language English
    Publishing date 2023-03-29
    Publishing country England
    Document type Journal Article
    ZDB-ID 1476244-4
    ISSN 1463-9084 ; 1463-9076
    ISSN (online) 1463-9084
    ISSN 1463-9076
    DOI 10.1039/d2cp05629a
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  9. Article ; Online: Continuous symmetry breaking in a trapped-ion spin chain.

    Feng, Lei / Katz, Or / Haack, Casey / Maghrebi, Mohammad / Gorshkov, Alexey V / Gong, Zhexuan / Cetina, Marko / Monroe, Christopher

    Nature

    2023  Volume 623, Issue 7988, Page(s) 713–717

    Abstract: One-dimensional systems exhibiting a continuous symmetry can host quantum phases of matter with true long-range order only in the presence of sufficiently long-range ... ...

    Abstract One-dimensional systems exhibiting a continuous symmetry can host quantum phases of matter with true long-range order only in the presence of sufficiently long-range interactions
    Language English
    Publishing date 2023-11-15
    Publishing country England
    Document type Journal Article
    ZDB-ID 120714-3
    ISSN 1476-4687 ; 0028-0836
    ISSN (online) 1476-4687
    ISSN 0028-0836
    DOI 10.1038/s41586-023-06656-7
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