Search Results - "Álvarez, Gonzalo A"

Measuring the spectrum of colored noise by dynamical decoupling by Álvarez, Gonzalo A, Suter, Dieter

“…Decoherence is one of the most important obstacles that must be overcome in quantum information processing. It depends on the qubit-environment coupling…”
Get full text

Localization-delocalization transition in the dynamics of dipolar-coupled nuclear spins by Álvarez, Gonzalo A., Suter, Dieter, Kaiser, Robin

“…Nonequilibrium dynamics of many-body systems are important in many scientific fields. Here, we report the experimental observation of a phase transition of the…”
Get full text

Robust dynamical decoupling for quantum computing and quantum memory by Souza, Alexandre M, Alvarez, Gonzalo A, Suter, Dieter

“…Dynamical decoupling (DD) is a popular technique for protecting qubits from the environment. However, unless special care is taken, experimental errors in the…”
Get full text

Robust dynamical decoupling by Souza, Alexandre M., Álvarez, Gonzalo A., Suter, Dieter

“…Quantum computers, which process information encoded in quantum mechanical systems, hold the potential to solve some of the hardest computational problems. A…”
Get full text

Optimized dynamical control of state transfer through noisy spin chains by Zwick, Analia, Álvarez, Gonzalo A, Bensky, Guy, Kurizki, Gershon

“…We propose a method of optimally controlling the tradeoff of speed and fidelity of state transfer through a noisy quantum channel (spin-chain). This process is…”
Get full text

NMR quantum simulation of localization effects induced by decoherence by Alvarez, Gonzalo A, Suter, Dieter

“…The loss of coherence in quantum mechanical superposition states limits the time for which quantum information remains useful. Similarly, it limits the…”
Get full text

Internal gradient distributions: A susceptibility-derived tensor delivering morphologies by magnetic resonance by Álvarez, Gonzalo A., Shemesh, Noam, Frydman, Lucio

“…Nuclear magnetic resonance is a powerful tool for probing the structures of chemical and biological systems. Combined with field gradients it leads to NMR…”
Get full text

Quantum sensing tools to characterize physical, chemical and biological processes with magnetic resonance by Zwick, Analia, Álvarez, Gonzalo A.

“…Nuclear Magnetic Resonance (NMR) plays a central role in developing quantum information sciences and technologies. Key features such as its non-invasive nature…”
Get full text

Robustness of spin-coupling distributions for perfect quantum state transfer by Zwick, Analia, Álvarez, Gonzalo A., Stolze, Joachim, Osenda, Omar

“…The transmission of quantum information between different parts of a quantum computer is of fundamental importance. Spin chains have been proposed as quantum…”
Get full text

Path Integral Framework for Characterizing and Controlling Decoherence Induced by Nonstationary Environments on a Quantum Probe by Kuffer, Martin, Zwick, Analia, Álvarez, Gonzalo A.

“…Reliable processing of quantum information is a milestone to achieve for the deployment of quantum technologies. Uncontrolled, out-of-equilibrium sources of…”
Get full text

Cumulant expansion framework for internal gradient distributions tensors by Pedraza Pérez, Leonardo A., Álvarez, Gonzalo A.

“…Magnetic resonance imaging is a powerful, non invasive tool for medical diagnosis. The low sensitivity for detecting the nuclear spin signals, typically limits…”
Get full text

Shift-driven modulations of spin-echo signals by Smith, Pieter E. S, Bensky, Guy, Álvarez, Gonzalo A, Kurizki, Gershon, Frydman, Lucio

“…Since the pioneering works of Carr-Purcell and Meiboom-Gill [Carr HY, Purcell EM (1954) Phys Rev 94:630; Meiboom S, Gill D (1985) Rev Sci Instrum 29:688],…”
Get full text

Quantum parallelism as a tool for ensemble spin dynamics calculations by Alvarez, Gonzalo A, Danieli, Ernesto P, Levstein, Patricia R, Pastawski, Horacio M

“…Efficient simulations of quantum evolutions of spin-1/2 systems are relevant for ensemble quantum computation as well as in typical NMR experiments. We propose…”
Get full text

Controlling spin-spin network dynamics by repeated projective measurements by Bretschneider, Christian O, Alvarez, Gonzalo A, Kurizki, Gershon, Frydman, Lucio

“…We show that coupled-spin network manipulations can be made highly effective by repeated projections of the evolving quantum states onto diagonal…”
Get full text

Size Distribution Imaging by Non-Uniform Oscillating-Gradient Spin Echo (NOGSE) MRI by Shemesh, Noam, Álvarez, Gonzalo A, Frydman, Lucio

“…Objects making up complex porous systems in Nature usually span a range of sizes. These size distributions play fundamental roles in defining the…”
Get full text

Performance comparison of dynamical decoupling sequences for a qubit in a rapidly fluctuating spin bath by Álvarez, Gonzalo A., Ajoy, Ashok, Peng, Xinhua, Suter, Dieter

“…Avoiding the loss of coherence of quantum mechanical states is an important prerequisite for quantum information processing. Dynamical decoupling (DD) is one…”
Get full text

Measuring small compartment dimensions by probing diffusion dynamics via Non-uniform Oscillating-Gradient Spin-Echo (NOGSE) NMR by Shemesh, Noam, Álvarez, Gonzalo A., Frydman, Lucio

“…•NOGSE, a novel diffusion MR approach for measuring pore sizes, is presented and analyzed.•NOGSE is based on a constant time and a constant number of…”
Get full text

Zeno and anti-zeno polarization control of spin ensembles by induced dephasing by Alvarez, Gonzalo A, Rao, D D Bhaktavatsala, Frydman, Lucio, Kurizki, Gershon

“…We experimentally and theoretically demonstrate the purity (polarization) control of qubits entangled with multiple spins, using induced dephasing in nuclear…”
Get full text

Coherent dynamical recoupling of diffusion-driven decoherence in magnetic resonance by Álvarez, Gonzalo A, Shemesh, Noam, Frydman, Lucio

“…During recent years, dynamical decoupling (DD) has gained relevance as a tool for manipulating and interrogating quantum systems. This is particularly relevant…”
Get full text

Erratum for the Appendix of “Measuring small compartment dimensions by probing diffusion dynamics via Non-uniform Oscillating-Gradient Spin-Echo (NOGSE) NMR” [J. Magn. Reson. 237 (2013) 49–62] by Shemesh, Noam, Álvarez, Gonzalo A., Frydman, Lucio

Get full text