Quantum Speed Limit of a Two-Level System Interacting with Multiple Bosonic Reservoirs
Sign Up to like & getrecommendations! Published in 2019 at "International Journal of Theoretical Physics"
DOI: 10.1007/s10773-019-04325-y
Abstract: A physical model for a two-level atom simultaneously coupled to multiple Bosonic reservoirs is investigated. The explicit expression of quantum speed limit is obtained. Analysis show that as long as the number of reservoirs satisfies… read more here.
Keywords: quantum speed; two level; system; multiple bosonic ... See more keywords
Quantum speed-up in global optimization of binary neural nets
Sign Up to like & getrecommendations! Published in 2020 at "New Journal of Physics"
DOI: 10.1088/1367-2630/abc9ef
Abstract: The performance of a neural network (NN) for a given task is largely determined by the initial calibration of the network parameters. Yet, it has been shown that the calibration, also referred to as training,… read more here.
Keywords: quantum speed; network; network parameters; global optimization ... See more keywords
Controlling the quantum speed limit time for unital maps via filtering operations
Sign Up to like & getrecommendations! Published in 2020 at "Laser Physics Letters"
DOI: 10.1088/1612-202x/abac15
Abstract: The minimum time a system needs to change from an initial state to a final orthogonal state is called quantum speed limit time. Quantum speed limit time can be used to quantify the speed of… read more here.
Keywords: quantum speed; time; limit time; speed limit ... See more keywords
Thermodynamics and the quantum speed limit in the non-Markovian regime
Sign Up to like & getrecommendations! Published in 2021 at "Physical Review A"
DOI: 10.1103/physreva.104.042202
Abstract: Quantum speed limit (QSL) for open quantum systems in the non-Markovian regime is analyzed. We provide a lower bound for the time required to transform an initial state to a final state in terms of… read more here.
Keywords: non markovian; thermodynamics; speed limit; markovian regime ... See more keywords
Quenching a quantum critical state by the order parameter: Dynamical quantum phase transitions and quantum speed limits
Sign Up to like & getrecommendations! Published in 2017 at "Physical Review B"
DOI: 10.1103/physrevb.95.060504
Abstract: Quantum critical states exhibit strong quantum fluctuations and are therefore highly susceptible to perturbations. In this work we study the dynamical stability against a sudden coupling to these strong fluctuations by quenching the order parameter… read more here.
Keywords: quantum speed; quantum; dynamical quantum; quantum critical ... See more keywords
Quantum Speed Limit is Not Quantum.
Sign Up to like & getrecommendations! Published in 2018 at "Physical review letters"
DOI: 10.1103/physrevlett.120.070402
Abstract: The quantum speed limit (QSL), or the energy-time uncertainty relation, describes the fundamental maximum rate for quantum time evolution and has been regarded as being unique in quantum mechanics. In this study, we obtain a… read more here.
Keywords: quantum speed; limit; mechanics; speed limit ... See more keywords
Distinct Bound of the Quantum Speed Limit via the Gauge Invariant Distance.
Sign Up to like & getrecommendations! Published in 2019 at "Physical review letters"
DOI: 10.1103/physrevlett.123.180403
Abstract: We derive a distinct bound of the quantum speed limit for a non-Hermitian quantum system by employing the gauge invariant and geometric natures of quantum mechanics. The bound is of geometric properties since it relates… read more here.
Keywords: quantum speed; distinct bound; bound quantum; gauge invariant ... See more keywords
Quantum Speed Limit Quantified by the Changing Rate of Phase.
Sign Up to like & getrecommendations! Published in 2021 at "Physical review letters"
DOI: 10.1103/physrevlett.127.100404
Abstract: The quantum speed limit is important in determining the minimum evolution time of a quantum system, and thus is essential for quantum community. In this Letter, we derive a novel unified quantum speed limit bound for… read more here.
Keywords: quantified changing; changing rate; speed limit; quantum ... See more keywords
Quantum Speed Limit for States with a Bounded Energy Spectrum.
Sign Up to like & getrecommendations! Published in 2022 at "Physical review letters"
DOI: 10.1103/physrevlett.129.140403
Abstract: Quantum speed limits set the maximal pace of state evolution. Two well-known limits exist for a unitary time-independent Hamiltonian: the Mandelstam-Tamm and Margolus-Levitin bounds. The former restricts the rate according to the state energy uncertainty,… read more here.
Keywords: states bounded; energy spectrum; quantum speed; bounded energy ... See more keywords
Quantum Speed-Up Induced by the Quantum Phase Transition in a Nonlinear Dicke Model with Two Impurity Qubits
Sign Up to like & getrecommendations! Published in 2022 at "Symmetry"
DOI: 10.3390/sym14122653
Abstract: In this paper, we investigate the effect of the Dicke quantum phase transition on the speed of evolution of the system dynamics. At the phase transition point, the symmetry associated with the system parity operator… read more here.
Keywords: system; speed; quantum speed; phase transition ... See more keywords