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Showing 2022 · quant-phShow all

14 papers · 2 filters

quant-ph2022★ 4 cited

The identification of mean quantum potential with Fisher information leads to a strong uncertainty relation

Yakov Bloch, Eliahu Cohen

The Cramer-Rao bound, satisfied by classical Fisher information, a key quantity in information theory, has been shown in different contexts to give rise to the Heisenberg uncertain…

quant-ph2022★ 6 cited

Navigating the noise-depth tradeoff in adiabatic quantum circuits

Daniel Azses, Maxime Dupont, Bram Evert +2

Adiabatic quantum algorithms solve computational problems by slowly evolving a trivial state to the desired solution. On an ideal quantum computer, the solution quality improves mo…

quant-ph2022★ 16 cited

Coherence and realism in the Aharonov-Bohm effect

Ismael L. Paiva, Pedro R. Dieguez, Renato M. Angelo +1

The Aharonov-Bohm effect is a fundamental topological phenomenon with a wide range of applications. It consists of a charge encircling a region with a magnetic flux in a superposit…

quant-ph2022★ 3 cited

Qubit-oscillator relationships in the open quantum Rabi model: the role of dissipation

G. Di Bello, L. M. Cangemi, V. Cataudella +3

Using a dissipative quantum Rabi model, we study the dynamics of a slow qubit coupled to a fast quantum harmonic oscillator interacting with a bosonic bath from weak to strong and…

quant-ph2022★ 34 cited

Projective measurements can probe non-classical work extraction and time-correlations

Santiago Hernández-Gómez, Stefano Gherardini, Alessio Belenchia +3

We demonstrate an experimental technique to characterize genuinely nonclassical multi-time correlations using projective measurements with no ancillae. We implement the scheme in a…

quant-ph2022★ 19 cited

Approximate encoding of quantum states using shallow circuits

Matan Ben Dov, David Shnaiderov, Adi Makmal +1

A common requirement of quantum simulations and algorithms is the preparation of complex states through sequences of 2-qubit gates. For a generic quantum state, the number of gates…

quant-ph2022★ 6 cited

Simulating long-range coherence of atoms and photons in quantum computers

Emanuele G. Dalla Torre, Matthew J. Reagor

Lasers and Bose-Einstein condensates (BECs) exhibit macroscopic quantum coherence in seemingly unrelated ways. Lasers possess a well-defined global phase and are characterized by l…

quant-ph2022★ 70 cited

Kirkwood-Dirac quasiprobability approach to the statistics of incompatible observables

Matteo Lostaglio, Alessio Belenchia, Amikam Levy +3

Recent work has revealed the central role played by the Kirkwood-Dirac quasiprobability (KDQ) as a tool to properly account for non-classical features in the context of condensed m…

quant-ph2022★ 5 cited

Entanglement transition through Hilbert-space localization

Quancheng Liu, Klaus Ziegler

We study Hilbert-space localization of the many-body dynamics due to ergodicity breaking and analyze this effect in terms of the entanglement entropy and the entanglement spectrum.…

quant-ph2022★ 4 cited

Protection of quantum information in a chain of Josephson junctions

Paul Brookes, Tikai Chang, Marzena Szymanska +3

Symmetry considerations are key towards our understanding of the fundamental laws of Nature. The presence of a symmetry implies that a physical system is invariant under specific t…

quant-ph2022★ 30 cited

Signatures of Dissipation Driven Quantum Phase Transition in Rabi Model

G. De Filippis, A. de Candia, G. Di Bello +6

By using worldline Monte Carlo technique, matrix product state and a variational approach à la Feynman, we investigate the equilibrium properties and relaxation features of the dis…

quant-ph2022★ 24 cited

Non-inertial quantum clock frames lead to non-Hermitian dynamics

Ismael L. Paiva, Amit Te'eni, Bar Y. Peled +2

The operational approach to time is a cornerstone of relativistic theories, as evidenced by the notion of proper time. In standard quantum mechanics, however, time is an external p…

quant-ph2022★ 5 cited

No-go theorems for deterministic purification and probabilistic enhancement of coherence

Qiming Ding, Quancheng Liu

The manipulation of quantum coherence is one of the principal issues in the resource theory of coherence, with two critical topics being the purification and enhancement of coheren…

quant-ph2022★ 4 cited

Induced on-demand revival in coined quantum walks on infinite -dimensional lattices

Mahesh N. Jayakody, Ismael L. Paiva, Asiri Nanayakkara +1

The study of recurrences and revivals in quantum systems has attracted a great deal of interest because of its importance in the control of quantum systems and its potential use in…