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Suppressing excitations in the nonlinear Landau-Zener model
Many complex quantum systems can be described by effectively nonlinear dynamics. While such dynamics have many appealing …
Sebastian Deffner
,
Steve Campbell
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Effect of Self-Interaction on Feynman's Interpretation of the Lamb Shift
We derive Bethe’s formula for the Lamb shift by extending Feynman’s suggestion that the shift could be interpreted as the …
Peter W. Milonni
,
Paul R. Berman
,
Kanu Sinha
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Uncertain Quantum Critical Metrology: From Single to Multi Parameter Sensing
Critical quantum metrology relies on the extreme sensitivity of a system’s eigenstates near the critical point of a quantum phase …
George Mihailescu
,
Steve Campbell
,
Karol Gietka
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Quantum speed limit for Kirkwood-Dirac quasiprobabilities
What is the minimal time until a quantum system can exhibit genuine quantum features? To answer this question we derive quantum speed …
Sagar Silva Pratapsi
,
Sebastian Deffner
,
Stefano Gherardini
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Spontaneous emission in the presence of quantum mirrors
Arrays of atoms coupled to waveguides can behave as mirrors. We consider an array of $\Lambda$-type three-level atoms wherein preparing …
Kanu Sinha
,
Jennifer Parra-Contreras
,
Annyun Das
,
Pablo Solano
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Emergence of $X$ states in a quantum impurity model
In the present work, we demonstrate the emergence of $X$ states in the long-time response of a locally perturbed many-body quantum …
Moallison F. Cavalcante
,
Marcus V. S. Bonança
,
Eduardo Miranda
,
Sebastian Deffner
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Stability of emergent time periodicity in a few-body interacting system
We examine the onset and resilience of emergent time periodicity in a few-body all-to-all interacting Lipkin-Meshkov-Glick model, where …
Steve Campbell
,
Jens Eisert
,
Giacomo Guarnieri
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Towards enhanced precision in thermometry with nonlinear qubits
Quantum thermometry refers to the study of measuring ultra-low temperatures in quantum systems. The precision of such a quantum …
Sebastian Deffner
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Thermally driven quantum refrigerator autonomously resets superconducting qubit
Although classical thermal machines power industries and modern living, quantum thermal engines have yet to prove their utility. Here, …
Mohammed Ali Aamir
,
Paul Jamet Suria
,
José Antonio Marín Guzmán
,
Claudia Castillo-Moreno
,
Jeffrey M. Epstein
,
Nicole Yunger Halpern
,
Simone Gasparinetti
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Thermodynamic perspective on quantum fluctuations
What is the major difference between large and small systems? At small length-scales the dynamics is dominated by fluctuations, whereas …
Akira Sone
,
Kanu Sinha
,
Sebastian Deffner
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