Giulia Rubino

Giulia Rubino
University of Bristol | UB · School of Physics

PhD

About

19
Publications
2,506
Reads
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653
Citations
Additional affiliations
March 2015 - present
University of Vienna
Position
  • PhD Student
Education
September 2009 - January 2015
Sapienza University of Rome
Field of study
  • Physics

Publications

Publications (19)
Preprint
Work is a process-based quantity, and its measurement typically requires interaction with a measuring device multiple times. While classical systems allow for non-invasive and accurate measurements, quantum systems present unique challenges due to the influence of the measuring device on the final value of work. As recent studies have shown, among...
Article
Full-text available
The study of thermodynamic fluctuations allows one to relate the free energy difference between two equilibrium states with the work done on a system through processes far from equilibrium. This finding plays a crucial role in the quantum regime, where the definition of work becomes nontrivial. Based on these relations, here we develop a simple int...
Article
Full-text available
The study of causal relations has recently been applied to the quantum realm, leading to the discovery that not all physical processes have a definite causal structure. While indefinite causal processes have previously been experimentally shown, these proofs relied on the quantum description of the experiments. Yet, the same experimental data could...
Article
Full-text available
Microscopic physical laws are time-symmetric, hence, a priori there exists no preferential temporal direction. However, the second law of thermodynamics allows one to associate the “forward” temporal direction to a positive variation of the total entropy produced in a thermodynamic process, and a negative variation with its “time-reversal” counterp...
Preprint
Full-text available
The study of thermodynamic fluctuations allows one to relate the free energy difference between two equilibrium states with the work done on a system through processes far from equilibrium. This finding plays a crucial role in the quantum regime, where the definition of work becomes non-trivial. Based on these relations, here we develop a simple in...
Article
Full-text available
In quantum communication networks, wires represent well-defined trajectories along which quantum systems are transmitted. In spite of this, trajectories can be used as a quantum control to govern the order of different noisy communication channels, and such a control has been shown to enable the transmission of information even when quantum communi...
Preprint
Full-text available
A priori, there exists no preferential temporal direction as microscopic physical laws are time-symmetric. Still, the second law of thermodynamics allows one to associate the `forward' temporal direction to a positive entropy variation in a thermodynamic process, and a negative variation with its `time-reversal' counterpart. This definition of a te...
Preprint
Full-text available
Traditional quantum communication assumes that particles are transmitted from a sender to a receiver in well-defined trajectories. In spite of this, trajectories can be used as a quantum control to govern the order of different noisy communication channels, and such a control has been shown to enable the transmission of information even when standa...
Article
In a recent series of works [Ebler et al., Phys. Rev. Lett. 120, 120502 (2018); arXiv:1809.06655v2; arXiv:1810.10457v2], it has been shown that the quantum superposition of causal order—the quantum switch—offers an enhancement of classical and quantum channel capacity through noisy channels, a phenomenon that was coined “causal activation.” In this...
Conference Paper
Various physical systems have been entangled, never the temporal order between events. Here we do just that, and then use the entanglement to create and characterize a process with genuinely indefinite temporal order.
Preprint
In a recent series of works [1-3], it has been proposed that the quantum superposition of causal order-the quantum switch-may offer an enhancement of classical and quantum channel capacity through noisy channels, a phenomena that was coined 'causal activation'. In this note, we attempt to clarify the nature of the purported advantage, by comparing...
Preprint
Full-text available
In a recent series of works [Phys. Rev. Lett. 120, 120502 (2018), arXiv:1809.06655, arXiv:1810.10457], it has been proposed that the quantum superposition of causal order -- the quantum switch -- may offer an enhancement of classical and quantum channel capacity through noisy channels, a phenomena that was coined `causal activation'. In this note,...
Conference Paper
Bell’s inequality has been violated using different physical systems, but never for the temporal order between events. Here we present such a Bell inequality and experimentally violate it by entangling the temporal order between events.
Article
Full-text available
The study of causal relations, a cornerstone of physics, has recently been applied to the quantum realm, leading to the discovery that not all quantum processes have a definite causal structure. Here, we present the first theory-independent experimental demonstration of entangled temporal orders, resulting in a process with an indefinite causal str...
Conference Paper
It has been predicted that quantum processes without a defined causal order exist. Here we present an overview of our experimental research program creating and characterizing such processes, discussing also their potential applications.
Article
Full-text available
Investigating the role of causal order in quantum mechanics has recently revealed that the causal distribution of events may not be a-priori well-defined in quantum theory. While this has triggered a growing interest on the theoretical side, creating processes without a causal order is an experimental task. Here we report the first decisive demonst...
Preprint
Investigating the role of causal order in quantum mechanics has recently revealed that the causal distribution of events may not be a-priori well-defined in quantum theory. While this has triggered a growing interest on the theoretical side, creating processes without a causal order is an experimental task. Here we report the first decisive demonst...

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