Relativistic Quantum Communication: Energy cost and channel capacities
- URL: http://arxiv.org/abs/2109.13896v1
- Date: Tue, 28 Sep 2021 17:47:53 GMT
- Title: Relativistic Quantum Communication: Energy cost and channel capacities
- Authors: Ian Bernardes Barcellos and Andre G. S. Landulfo
- Abstract summary: We consider the communication of classical and quantum information between two arbitrary observers in flat spacetimes.
By means of localized two-level quantum systems, sender and receiver can use a quantum scalar field as a communication channel.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: We consider the communication of classical and quantum information between
two arbitrary observers in asymptotically flat spacetimes (possibly containing
black holes) and investigate what is the energy cost for such information
transmission. By means of localized two-level quantum systems, sender and
receiver can use a quantum scalar field as a communication channel. As we have
already shown in a previous paper, such a channel has non-vanishing classical
capacity as well as entanglement-assisted classical and quantum capacities.
Here we will show that the change in the expectation value of the energy of the
system during the communication process can be separated in: (i) a contribution
coming from the particle creation due to the change of the spacetime, (ii) a
contribution associated with the energy needed to switch-on/off each qubit, and
{\bf (iii)} a term which comes from the communication process itself. For the
quantum channel considered here, we show that the extra energy cost needed for
communication vanishes. As a result, if one has already created a system of
qubits for some specific task (e.g., quantum computation) one can also reliably
convey information between its parts with no extra energy cost. We conclude the
paper by illustrating the form of the channel capacities and energy
contributions in two paradigmatic cases in Minkowski spacetime: (1) sender and
receiver in inertial motion and (2) sender in inertial motion while the
receiver is uniformly accelerated.
Related papers
- Second Law of Entanglement Manipulation with Entanglement Battery [41.94295877935867]
A central question since the beginning of quantum information science is how two distant parties can convert one entangled state into another.
It has been conjectured that entangled state transformations could be executed reversibly in an regime, mirroring the nature of Carnot cycles in classical thermodynamics.
We investigate the concept of an entanglement battery, an auxiliary quantum system that facilitates quantum state transformations without a net loss of entanglement.
arXiv Detail & Related papers (2024-05-17T07:55:04Z) - Quantum networks using counterfactual quantum communication [0.0]
We propose a new counterfactual quantum communication protocol for transmitting an entangled state from a pair of electrons to two independent photons.
We show that the protocol finds uses in building quantum repeaters leading to a counterfactual quantum network.
arXiv Detail & Related papers (2024-01-30T19:27:09Z) - A relativistic quantum broadcast channel [0.0]
We investigate the transmission of classical and quantum information between three observers in a general globally hyperbolic spacetime.
We build a model for a quantum broadcast channel in which one observer wishes to transmit (classical and quantum) information to two other observers.
arXiv Detail & Related papers (2023-09-25T21:20:08Z) - Noise is resource-contextual in quantum communication [1.8749305679160366]
Estimating the information transmission capability of a quantum channel remains one of the fundamental problems in quantum information processing.
One of the most significant manifestations of this is the superadditivity of the channel capacity.
Our constructions demonstrate that noise is context dependent in quantum communication.
arXiv Detail & Related papers (2023-05-01T06:24:03Z) - Correlation measures of a quantum state and information characteristics
of a quantum channel [0.0]
We discuss the interconnections between basic correlation measures of a bipartite quantum state and basic information characteristics of a quantum channel.
We describe properties of the (unoptimized and optimized) quantum discord in infinite bipartite systems.
arXiv Detail & Related papers (2023-04-11T17:58:13Z) - Entanglement Distribution and Quantum Teleportation in Higher Dimension
over the Superposition of Causal Orders of Quantum Channels [13.359442837017202]
We develop and formulate the theoretical framework for transmission of classical information through entanglement distribution of qudits over two quantum channels.
Results show that entanglement distribution of a qudit provides a considerable gain in fidelity even with increase in noise.
arXiv Detail & Related papers (2023-03-19T15:06:24Z) - Entanglement catalysis for quantum states and noisy channels [41.94295877935867]
We investigate properties of entanglement and its role for quantum communication.
For transformations between bipartite pure states, we prove the existence of a universal catalyst.
We further develop methods to estimate the number of singlets which can be established via a noisy quantum channel.
arXiv Detail & Related papers (2022-02-10T18:36:25Z) - From geometry to coherent dissipative dynamics in quantum mechanics [68.8204255655161]
We work out the case of finite-level systems, for which it is shown by means of the corresponding contact master equation.
We describe quantum decays in a 2-level system as coherent and continuous processes.
arXiv Detail & Related papers (2021-07-29T18:27:38Z) - Creating and destroying coherence with quantum channels [62.997667081978825]
We study optimal ways to create a large amount of quantum coherence via quantum channels.
correlations in multipartite systems do not enhance the ability of a quantum channel to create coherence.
We show that a channel can destroy more coherence when acting on a subsystem of a bipartite state.
arXiv Detail & Related papers (2021-05-25T16:44:13Z) - Information Scrambling in Computationally Complex Quantum Circuits [56.22772134614514]
We experimentally investigate the dynamics of quantum scrambling on a 53-qubit quantum processor.
We show that while operator spreading is captured by an efficient classical model, operator entanglement requires exponentially scaled computational resources to simulate.
arXiv Detail & Related papers (2021-01-21T22:18:49Z) - Permutation Enhances Classical Communication Assisted by Entangled
States [67.12391801199688]
We show that the capacity satisfies the strong converse property and thus the formula serves as a sharp dividing line between achievable and unachievable rates of communication.
As examples, we derive analytically the classical capacity of various quantum channels of interests.
arXiv Detail & Related papers (2020-01-07T01:49:31Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.