Measurements of Quantum Hamiltonians with Locally-Biased Classical Shadows
Sign Up to like & getrecommendations! Published in 2022 at "Communications in Mathematical Physics"
DOI: 10.1007/s00220-022-04343-8
Abstract: Obtaining precise estimates of quantum observables is a crucial step of variational quantum algorithms. We consider the problem of estimating expectation values of quantum Hamiltonians, obtained on states prepared on a quantum computer. We propose… read more here.
Keywords: quantum hamiltonians; measurements quantum; biased classical; hamiltonians locally ... See more keywords
Enhancing Revivals via Projective Measurements in a Quantum Scarred System.
Sign Up to like & getrecommendations! Published in 2025 at "Physical review letters"
DOI: 10.1103/jf2f-wqkx
Abstract: Quantum many-body scarred systems exhibit atypical dynamical behavior, evading thermalization and featuring periodic state revivals. In this Letter, we investigate the impact of projective measurements on the dynamics in the scar subspace for the paradigmatic… read more here.
Keywords: system; measurements quantum; projective measurements; enhancing revivals ... See more keywords
Sequential Measurements for Quantum-Enhanced Magnetometry in Spin Chain Probes.
Sign Up to like & getrecommendations! Published in 2022 at "Physical review letters"
DOI: 10.1103/physrevlett.129.120503
Abstract: Quantum sensors outperform their classical counterparts in their estimation precision, given the same amount of resources. So far, quantum-enhanced sensitivity has been achieved by exploiting the superposition principle. This enhancement has been obtained for particular… read more here.
Keywords: many body; quantum; sequential measurements; enhanced magnetometry ... See more keywords
Repeated Temperature Measurements in Quantum Thermodynamics
Sign Up to like & getrecommendations! Published in 2025 at "Lobachevskii Journal of Mathematics"
DOI: 10.1134/s1995080225608082
Abstract: In this work, we model the temperature measurement as transformation of the arbitrary state into Gibbs state. We start with general formalism of ansatz-posteriors, which includes many usual models of posterior states due to measurement… read more here.
Keywords: temperature; temperature measurements; thermodynamics; measurements quantum ... See more keywords
On the measurements in Quantum Gravity
Sign Up to like & getrecommendations! Published in 2024 at "International Journal of Modern Physics D"
DOI: 10.1142/s0218271824410177
Abstract: In this essay, we argue that certain aspects of the measurement require revision in Quantum Gravity. Using entropic arguments, we propose that the number of measurement outcomes and the accuracy (or the range) of the… read more here.
Keywords: quantum gravity; gravity; measurements quantum;