650 citations · 7.9k across the 124 of their papers we have counts for
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Probing quantum chaos in multipartite systems
Zan Cao, Zhenyu Xu, Adolfo del Campo
Understanding the emergence of quantum chaos in multipartite systems is challenging in the presence of interactions. We show that the contribution of the subsystems to the global b…
Variational principle for optimal quantum controls in quantum metrology
Jing Yang, Shengshi Pang, Zekai Chen +2
We develop a variational principle to determine the quantum controls and initial state which optimizes the quantum Fisher information, the quantity characterizing the precision in…
Benchmarking quantum annealing dynamics: the spin-vector Langevin model
David Subires, Fernando J. Gómez-Ruiz, Antonia Ruiz-García +2
The classical spin-vector Monte Carlo (SVMC) model is a reference benchmark for the performance of a quantum annealer. Yet, as a Monte Carlo method, SVMC is unsuited for an accurat…
Unifying Quantum and Classical Speed Limits on Observables
Luis Pedro García-Pintos, Schuyler Nicholson, Jason R. Green +2
The presence of noise or the interaction with an environment can radically change the dynamics of observables of an otherwise isolated quantum system. We derive a bound on the spee…
Spectral Filtering Induced by Non-Hermitian Evolution with Balanced Gain and Loss: Enhancing Quantum Chaos
Julien Cornelius, Zhenyu Xu, Avadh Saxena +2
The dynamical signatures of quantum chaos in an isolated system are captured by the spectral form factor, which exhibits as a function of time a dip, a ramp, and a plateau, with th…
Parent Hamiltonians of Jastrow Wavefunctions
Mathieu Beau, Adolfo del Campo
We find the complete family of many-body quantum Hamiltonians with ground-state of Jastrow form involving the pairwise product of a pair function in an arbitrary spatial dimension.…
Digitized-counterdiabatic quantum approximate optimization algorithm
P. Chandarana, N. N. Hegade, K. Paul +4
The quantum approximate optimization algorithm (QAOA) has proved to be an effective classical-quantum algorithm serving multiple purposes, from solving combinatorial optimization p…
Dark solitons in a trapped gas of long-range interacting bosons
M. Beau, A. del Campo, D. J. Frantzeskakis +2
We consider the interplay of repulsive short-range and same-sign long-range interactions in the dynamics of dark solitons, as prototypical coherent nonlinear excitations in a trapp…
Distribution of Kinks in an Ising Ferromagnet After Annealing and the Generalized Kibble-Zurek Mechanism
Jack J. Mayo, Zhijie Fan, Gia-Wei Chern +1
We consider the annealing dynamics of a one-dimensional Ising ferromagnet induced by a temperature quench in finite time. In the limit of slow cooling, the asymptotic two-point cor…
Super-Heisenberg scaling in Hamiltonian parameter estimation in the long-range Kitaev chain
Jing Yang, Shengshi Pang, Adolfo del Campo +1
In quantum metrology, nonlinear many-body interactions can enhance the precision of Hamiltonian parameter estimation to surpass the Heisenberg scaling. Here, we consider the estima…