Quantum Feedback Thermal Machines

September 12, 2022 by | Uncategorized

Wednesday, 14 September 2022 @ 10 AM in 149 Keck Center, or join us on Zoom. Abstract: We will discuss the thermodynamic aspects of a single qubit-based and coupled qubit-based devices, powered by weak quantum measurements, and feedback controlled by a quantum Maxwell’s demon. Single qubit-based device: We will discuss both discrete and time-continuous operation of


Generalized super-phenomena for arbitrary quantum observables

September 2, 2022 by | Uncategorized

Wednesday, 7 September 2022 @ 10 AM in 149 Keck Center, or join us on Zoom. Abstract:I will show how to generalize superoscillations to arbitrary observables in quantum mechanics.  Super phenomena of total angular momentum and energy will be described. Using the example of a sequence of harmonic oscillators, I will demonstrate that high energy


Quantum information about unknown parameters can be compressed unboundedly without loss

July 14, 2022 by | Uncategorized

Wednesday, 27 July 2022 @ 12 PM in 149 Keck Center, or join us on Zoom. Abstract: Several tasks in quantum-information processing involve quantum learning. For example, quantum sensing, quantum machine learning and quantum-computer calibration involve learning and estimating unknown parameters from measurements of many copies of a quantum state that depends on those parameters.


Quantum processes with quantum causal structure

June 16, 2022 by | Uncategorized

Thursday, 30 June 2022 @ 12 PM in 149 Keck Center, or join us on Zoom. Abstract: Quantum Theory requires a background causal structure for its formulation, with temporal and spatial correlations treated in a very asymmetric way. However, spacetime might lose its classical properties  when Quantum Theory combines with General Relativity. This motivates a


Superoscillations - Theoretical Aspects and Applications Symposium 2

May 27, 2022 by | Uncategorized

Symposium Information Superoscillations were identified independently by Sir Michael Berry and Yakir Aharonov in very different contexts, but in the last several years the communities of mathematicians and physicists have taken increased interest in this phenomenon, both because of its interesting mathematical characteristics, and because of its many potential applications. This symposium is intended not


Post-selection and Quantum Energetics

May 17, 2022 by | Uncategorized

Tuesday, 24 May 2022 @ 2 PM in 149 Keck Center, or join us on Zoom. Abstract: We investigate the anomalous energy change of the measurement apparatus when a qubit is measured in bases that do not commute with energy. We model two possible measurement implementations: one is a quantum clock model with a completely


Quantum Theory faces Cosmology, and vice-versa

May 9, 2022 by | Uncategorized

Thursday, 12 May 2022 @ 4 PM. Join us on Zoom. Abstract: In its usual formulation, Quantum Theory presents apparently unavoidable difficulties when applied to Cosmology. Hence, either it is assumed that the Quantum Theory is not wide enough to apply to the physics of the Universe, nowadays successfully tested by numerous sophisticated observations, or


Bounding quantum advantages in Postselected Metrology

April 28, 2022 by | Uncategorized

Friday, 6 May 2022 @ 9 AM. Join us on Zoom. Abstract: Weak value amplification and other postselection-based metrological protocols can enhance precision while estimating small parameters, outperforming postselection-free protocols. In general, these enhancements are largely constrained because the protocols yielding higher precision are rarely obtained due to a lower probability of successful postselection. It

Log In
Open Main Menu