![The Time Machine Factory [unspeakable, speakable] on Time Travel - TMF2024](/event/751/logo-2372865151.png){kind=logo}
Conveners
Session V. Teleportation, entanglement and decoherence
- Lorenzo Maccone
Session V. Teleportation, entanglement and decoherence: Morning session
- Marco Genovese (INRIM)
Session V. Teleportation, entanglement and decoherence: Afternoon session
- Marco Genovese (INRIM)
-
Prof. Vlakto Vedral (University of Oxford)23/09/2024, 13:45talk
In my talk I will review the idea of pseudo-density matrices (PDMs), which are states of physical systems "stretching across" time. They arise by treating different instances of time as different Hilbert spaces connected by the usual tensor product structure that is normally used for spatial modes (i.e., different instances of time become different modes in this formulation). I will then talk...
Go to contribution page -
Chiara Marletto (University of Oxford)23/09/2024, 14:20talk
I will present a general theorem stating that if one can extract diffrent amounts of work deterministically from from a system prepared in any one of a set of states, then those states must be perfectly distinguishable from one another. This result is formulated independently of scale and of particular dynamical laws; it also provides a novel connection between thermodynamics and information...
Go to contribution page -
Randy Dumont (McMaster University)25/09/2024, 09:00talk
Numerical solutions of the Dirac equation show that, post-selected for tunneling, relativistic electrons can exhibit transit time distributions with a peak corresponding to superluminal effective velocity. However, a non-negligible effect is seen only when tunneling probability is very small. If one attempts to send a signal using many electrons to compensate for the low tunneling...
Go to contribution page -
Dr Alberto Porzio (Università di Cassino e del Lazio Meridionale, SPIN CNR, INFN)25/09/2024, 09:25talk
Recently, we have experimentally proved that the noise limit for GINGERINO, a running large frame ring laser gyroscope installed inside the Gran Sasso National Laboratory, contradicts the shot-noise limit so far predicted for this class of instruments. Starting from a review on the measurement principles of a Sagnac RLG, we present this result and discuss a possible novel theoretical approach...
Go to contribution page -
Prof. Elihau Cohen (Faculty of Engineering and the Institute of Nanotechnology and Advanced Materials, Bar Ilan University, Ramat Gan 5290002, Israel )25/09/2024, 10:00talk
In this talk I will use the Page-Wootters "timeless" framework for analyzing dynamics from the perspective of inertial and non-inertial quantum clocks. I will derive a new time-energy uncertainty relation indicating that the duration of an energy measurement carried out by an external system cannot be performed arbitrarily fast from the perspective of the internal clock [1]. In addition, when...
Go to contribution page -
Giuseppe Di Pietra (University of Oxford)25/09/2024, 11:05talk
A general entanglement-based witness of non-classicality has recently been proposed, which can be applied to testing quantum effects in gravity. This witness is based on generating entanglement between two quantum probes via a mediator. We provide a "temporal" variant of this witness, using a single quantum probe to assess the non-classicality of the mediator. Within the formalism of quantum...
Go to contribution page -
Hou Yau (San Francisco State University)25/09/2024, 11:30talk
We demonstrate that a matter field with proper time oscillations has the properties of a quantum field. The particles observed are oscillators propagating back and forth in time. We also find that the internal time of the field is self-adjoint. The proper time oscillation of an observed particle satisfies an uncertainty relation analogous to that between spatial position and momentum. To test...
Go to contribution page -
Dr Michael Suleymanov25/09/2024, 11:55talk
The perspective-dependence of position and momentum uncertainties and their
Go to contribution page
correlations are studied in the framework of nonrelativistic spatiotemporal quantum
frames of reference [M. Suleymanov, I.L. Paiva, E. Cohen, Nonrelativistic
spatiotemporal quantum reference frames, Phys. Rev. A 109, 032205 (2024)]. One
of the results [M. Suleymanov, A. Carmi, E. Cohen, Uncertainties and... -
Jonte Hance (Newcastle University)25/09/2024, 12:30talk
We quantify the difference between classical and quantum counterfactual effects, where an output distribution is somehow changed by the removal of signal (``blocking'') at some point. We show that there is a counterfactual gain in quantum counterfactual communication, which quantifies the effect it has above and beyond any classical counterfactual effect, and that this counterfactual gain...
Go to contribution page -
Ettore Bernardi (INRIM)25/09/2024, 14:10talk
In contemporary physics, there is a quest to unite quantum theory and general relativity. Recently, there has been discussion about using the observation of gravity-induced entanglement to demonstrate the quantum nature of gravity. While some experimental proposals have been in this direction, the extreme technological requirements make their implementation quite challenging. We present a...
Go to contribution page -
Salvatore Virzi (INRIM)talk
Recently, a novel quantum mechanical tool dubbed pseudo-density operator (PDO) has been introduced [1], allowing to treat spatial and temporal quantum correlations on an equal footing and resulting particularly suited for modelling, e.g., exotic spacetime scenarios.
Go to contribution page
Here we illustrate some results obtained by applying PDOs to two different frameworks. The first one involves quantum particles...