779 citations · 2.1k across the 38 of their papers we have counts for
38 papers
Quantum optimal control of steady orbits
Shebha Anandhi Jegadeesan, Yujie Zhao, Robert Hunter +6
Periodically driven dissipative systems can settle into steady orbits - fixed loops on their dynamical manifolds. In quantum mechanics, steady orbits occur in cooling engines (used…
Simulation of pulsed dynamic nuclear polarization in the steady state
Shebha Anandhi Jegadeesan, Yujie Zhao, Graham M. Smith +2
In pulsed dynamic nuclear polarization (DNP), enhancement of the polarization of bulk nuclei requires the repeated application of a microwave pulse sequence. So far, analysis of a…
Chemical hydrodynamics of nuclear spin states
Anupama Acharya, Madhukar Said, Sylwia J. Barker +3
Quantum mechanical equations of motion are strictly linear in state descriptors, such as wavefunctions and density matrices, but equations describing chemical kinetics and hydrodyn…
Instrumental distortions in quantum optimal control
Uluk Rasulov, Ilya Kuprov
Quantum optimal control methods, such as gradient ascent pulse engineering (GRAPE), are used for precise manipulation of quantum states. Many of those methods were pioneered in mag…
Optimizing beam-splitter pulses for atom interferometry: a geometric approach
Nikolaos Dedes, Jack Saywell, Max Carey +2
We present a methodology for the design of optimal Raman beam-splitter pulses suitable for cold atom inertial sensors. The methodology, based on time-dependent perturbation theory,…
Simulation and design of shaped pulses beyond the piecewise-constant approximation
Uluk Rasulov, Anupama Acharya, Marina Carravetta +2
Response functions of resonant circuits create ringing artefacts if their input changes rapidly. When physical limits of electromagnetic spectroscopies are explored, this creates t…
Toroidal optical transitions in hydrogen-like atoms
Ilya Kuprov, David Wilkowski, Nikolay Zheludev
It is commonly believed that electromagnetic spectra of atoms and molecules can be fully described by interactions of electric and magnetic multipoles. However, it has recently bec…
Heteronuclear transfers from labile protons in biomolecular NMR: Cross Polarization, revisited
Mihajlo Novakovic, Sundaresan Jayanthi, Adonis Lupulescu +5
INEPT- and HMQC-based pulse sequences are widely used to transfer polarization between heteronuclei, particularly in biomolecular spectroscopy: they are easy to setup and involve l…
J-driven Dynamic Nuclear Polarization for sensitizing high field solution state NMR
Maria Grazia Concilio, Ilya Kuprov, Lucio Frydman
Dynamic nuclear polarization is widely used to enhance the sensitivity of nuclear magnetic resonance. It is presently the method of choice for enhancing the sensitivity of high-fie…
Optimal control gradient precision trade-offs: application to fast generation of DeepControl libraries for MRI
Mads Sloth Vinding, David L. Goodwin, Ilya Kuprov +1
We have recently demonstrated supervised deep learning methods for rapid generation of radiofrequency pulses in magnetic resonance imaging (https://doi.org/10.1002/mrm.27740, https…
Neural networks in pulsed dipolar spectroscopy: a practical guide
Jake Keeley, Tajwar Choudhury, Laura Galazzo +12
This is a methodological guide to the use of deep neural networks in the processing of pulsed dipolar spectroscopy (PDS) data encountered in structural biology, organic photovoltai…
High-field solution state DNP using cross-correlations
Maria Grazia Concilio, Murari Soundararajan, Lucio Frydman +1
At the magnetic fields of common NMR instruments, electron Zeeman frequencies are too high for efficient electron-nuclear dipolar cross-relaxation to occur in solution. The rate of…
Bi-selective pulses for large-area atom interferometry
Jack Saywell, Max Carey, Ilya Kuprov +1
We present designs for the augmentation 'mirror' pulses of large-momentum-transfer atom interferometers that maintain their fidelity as the wavepacket momentum difference is increa…
Optimized Raman pulses for atom interferometry
Jack Saywell, Max Carey, Mohammad Belal +2
We present mirror and beamsplitter pulse designs that improve the fidelity of atom interferometry and increase its tolerance of systematic inhomogeneities. These designs are demons…
Neural network interpretation using descrambler groups
Jake L. Amey, Jake Keeley, Tajwar Choudhury +1
The lack of interpretability and trust is a much-criticised feature of deep neural networks. In fully connected nets, the signalling between inner layers is scrambled because backp…
Optimal control of mirror pulses for atom interferometry
Jack Saywell, Ilya Kuprov, David Goodwin +2
Atom matterwave interferometry requires mirror and beamsplitter pulses that are robust to inhomogeneities in field intensity, magnetic environment, atom velocity and Zeeman sub-sta…
Feedback control optimisation of ESR experiments
David L. Goodwin, William K. Myers, Christiane R. Timmel +1
Numerically optimised microwave pulses are used to increase excitation efficiency and modulation depth in electron spin resonance experiments performed on a spectrometer equipped w…
Pseudocontact shifts from mobile spin labels
E. Suturina, Ilya Kuprov
This paper presents a detailed analysis of the pseudocontact shift (PCS) field induced by a mobile spin label that is viewed as a probability density distribution with an associate…
Fokker-Planck formalism in magnetic resonance simulations
Ilya Kuprov
This paper presents an overview of the Fokker-Planck formalism for non-biological magnetic resonance simulations, describes its existing applications and proposes some novel ones.…
Modified Newton-Raphson GRAPE methods for optimal control of spin systems
D. L. Goodwin, Ilya Kuprov
Quadratic convergence throughout the active space is achieved for the gradient ascent pulse engineering (GRAPE) family of quantum optimal control algorithms. We demonstrate in this…
Toroidal optical activity
T. A. Raybould, V. A. Fedotov, N. Papasimakis +5
Optical activity is ubiquitous across natural and artificial media and is conventionally understood in terms of scattering from electric and magnetic moments. Here we demonstrate e…
Training Schrödinger's cat: quantum optimal control
Stefffen J. Glaser, Ugo Boscain, Tommaso Calarco +9
It is control that turns scientific knowledge into useful technology: in physics and engineering it provides a systematic way for driving a system from a given initial state into a…
Auxiliary matrix formalism for interaction representation transformations, optimal control and spin relaxation theories
D. L. Goodwin, Ilya Kuprov
Auxiliary matrix exponential method is used to derive simple and numerically efficient general expressions for the following, historically rather cumbersome and hard to compute, th…
A partial differential equation for pseudocontact shift
G. T. P. Charnock, Ilya Kuprov
It is demonstrated that pseudocontact shift (PCS), viewed as a scalar or a tensor field in three dimensions, obeys an elliptic partial differential equation with a source term that…