136 citations · 675 across the 29 of their papers we have counts for
29 papers
Quantum sensing via magnetic-noise-protected states in an electronic spin dyad
Carlos A. Meriles, Pablo R. Zangara, Daniela Pagliero
Extending the coherence lifetime of a qubit is central to the implementation and deployment of quantum technologies, particularly in the solid-state where various noise sources int…
Dynamic-nuclear-polarization-weighted spectroscopy of multi-spin electronic-nuclear clusters
Roberta Pigliapochi, Daniela Pagliero, Lisandro Buljubasich +4
Nuclear spins and paramagnetic centers in a solid randomly group to form clusters featuring nearly-degenerate, hybrid states whose dynamics are central to processes involving nucle…
Toward deep-learning-assisted spectrally-resolved imaging of magnetic noise
Fernando Meneses, David F. Wise, Daniela Pagliero +3
Recent progress in the application of color centers to nanoscale spin sensing makes the combined use of noise spectroscopy and scanning probe imaging an attractive route for the ch…
Spin dynamics of a solid-state qubit in proximity to a superconductor
Richard Monge, Tom Delord, Nicholas Proscia +11
A broad effort is underway to understand and harness the interaction between superconductors and spin-active color centers with an eye on the realization of hybrid quantum devices…
Microwave-free dynamic nuclear polarization via sudden thermal jumps
Carlos A. Meriles, Pablo R. Zangara
Dynamic Nuclear Polarization (DNP) presently stands as the preferred strategy to enhance the sensitivity of nuclear magnetic resonance measurements, but its application relies on t…
Ergodicity breaking in an incommensurate system observed by OTOCs and Loschmidt Echoes: From quantum diffusion to sub-diffusion
Fabricio S. Lozano-Negro, Pablo R. Zangara, Horacio M. Pastawski
The metal-insulator transition (MIT), which includes Anderson localization and Mott insulators as extreme regimes, has received renewed interest as the many-body effects often cons…
One-directional polarization transport in electron/nuclear spin chains with loss and gain
Santiago Bussandri, Pablo R. Zangara, Rodolfo H. Acosta +1
Understanding the joint dynamics of electron and nuclear spins is central to core concepts in solid-state magnetic resonance - such as spin-lattice relaxation and dynamic nuclear p…
Nuclear spin temperature reversal via continuous radio-frequency driving
Pablo R. Zangara, Daniela Pagliero, Ashok Ajoy +3
Optical spin pumping of color centers in diamond is presently attracting broad interest as a platform for dynamic nuclear polarization at room temperature, but the mechanisms invol…
Magnetic-field-induced delocalization in hybrid electron-nuclear spin ensembles
Daniela Pagliero, Pablo R. Zangara, Jacob Henshaw +6
We use field-cycling-assisted dynamic nuclear polarization and continuous radio-frequency (RF) driving over a broad spectral range to demonstrate magnetic-field-dependent activatio…
Optically pumped spin polarization as a probe of many-body thermalization
Daniela Pagliero, Pablo R. Zangara, Jacob Henshaw +5
The interplay between disorder and transport is a problem central to the understanding of a broad range of physical processes, most notably the ability of a system to reach thermal…
Mechanical rotation via optical pumping of paramagnetic impurities
Pablo R. Zangara, Alexander Wood, Marcus W. Doherty +1
Hybrid quantum systems exhibiting coupled optical, spin, and mechanical degrees of freedom can serve as a platform for sensing, or as a bus to mediate interactions between qubits w…
13C dynamic nuclear polarization in diamond via a microwave-free 'integrated' cross effect
J. Henshaw, D. Pagliero, P. R. Zangara +6
Color-center-hosting semiconductors are emerging as promising source materials for low-field dynamic nuclear polarization (DNP) at or near room temperature, but hyperfine broadenin…
Two-electron-spin ratchets as a platform for microwave-free dynamic nuclear polarization of arbitrary material targets
Pablo R. Zangara, Jacob Henshaw, Daniela Pagliero +4
Optically-pumped color centers in semiconductor powders can potentially induce high levels of nuclear spin polarization in surrounding solids or fluids at or near ambient condition…
Dynamics of frequency-swept nuclear spin optical pumping in powdered diamond at low magnetic fields
Pablo R. Zangara, Siddharth Dhomkar, Ashok Ajoy +7
A broad effort is underway to improve the sensitivity of nuclear magnetic resonance through the use of dynamic nuclear polarization. Nitrogen-vacancy (NV) centers in diamond offer…
Charge dynamics in near-surface, variable-density ensembles of nitrogen-vacancy centers in diamond
Siddharth Dhomkar, Harishankar Jayakumar, Pablo R. Zangara +1
Although the spin properties of superficial shallow nitrogen-vacancy (NV) centers have been the subject of extensive scrutiny, considerably less attention has been devoted to study…
Orientation independent room-temperature optical 13C hyperpolarization in powdered diamond
A. Ajoy, K. Liu, R. Nazaryan +15
Dynamic nuclear polarization via contact with electronic spins has emerged as an attractive route to enhance the sensitivity of nuclear magnetic resonance (NMR) beyond the traditio…
On-Demand Generation of Neutral and Negatively-Charged Silicon-Vacancy Centers in Diamond
Siddharth Dhomkar, Pablo R. Zangara, Jacob Henshaw +1
Point defects in wide-bandgap semiconductors are emerging as versatile resources for nanoscale sensing and quantum information science but our understanding of the photo-ionization…
Multi-spin-assisted optical pumping of bulk 13C nuclear spin polarization in diamond
Daniela Pagliero, K. R. Koteswara Rao, Pablo R. Zangara +11
One of the most remarkable properties of the nitrogen-vacancy (NV) center in diamond is that optical illumination initializes its electronic spin almost completely, a feature that…
Loschmidt echo in many-spin systems: a quest for intrinsic decoherence and emergent irreversibility
Pablo R. Zangara, Horacio M. Pastawski
If a magnetic polarization excess is locally injected in a crystal of interacting spins, this "excitation" would spread as consequence of spin-spin interactions. Such an apparently…
Role of energy uncertainties in ergodicity breaking induced by competing interactions and disorder. A dynamical assessment through the Loschmidt echo
Pablo R. Zangara, Patricia R. Levstein, Horacio M. Pastawski
A local excitation in a quantum many-particle system evolves deterministically. A time-reversal procedure, involving the invertion of the signs of every energy and interaction, sho…
Loschmidt echo in many-spin systems: contrasting time-scales of local and global measurements
Pablo R. Zangara, Denise Bendersky, Patricia R. Levstein +1
A local excitation in a quantum many-spin system evolves deterministically. A time-reversal procedure, involving the inversion of the signs of every energy and interaction, should…
Proliferation of effective interactions: decoherence-induced equilibration in a closed many-body system
Pablo R. Zangara, Denise Bendersky, Horacio M. Pastawski
We address the question on how weak perturbations, that are quite ineffective in small many-body systems, can lead to decoherence and hence to irreversibility when they proliferate…
On the long-time asymptotics of quantum dynamical semigroups
Guido A. Raggio, Pablo R. Zangara
We consider semigroups of normal, unital, completely positive maps on a von Neumann algebra . The (predual) semigroup $ν_t (ρ):= ρ\circ α_…
Fragility of superposition states evaluated by the Loschmidt Echo
Denise Bendersky, Pablo R. Zangara, Horacio M. Pastawski
We consider the degradation of the dynamics of a Gaussian wave packet in a harmonic oscillator under the presence of an environment. This last is given by a single non-degenerate t…