Quantum Information in Quantum Gravity
A special issue of Entropy (ISSN 1099-4300). This special issue belongs to the section "Quantum Information".
Deadline for manuscript submissions: closed (31 May 2022) | Viewed by 13113
Special Issue Editors
Interests: quantum foundations; relativistic quantum information; black hole thermodynamics
Special Issue Information
Dear Colleagues,
Quantum theory and general relativity are the fundamental theories of modern physics, and are both highly successful in their domains. However, they are ultimately incompatible: their mathematical and conceptual structures are very different. A unifying theory of quantum gravity is necessary. However, despite many decades of effort, no consistent and predictive theory of quantum gravity exists.
In recent years, a seemingly unrelated development has begun to make an impact on quantum gravity research: the development of quantum information theory. Quantum information focusses on features of quantum theory that have no analogue in classical physics, like superposition and entanglement. While quantum information theory is mostly discussed in terms of non-relativistic quantum mechanics, there is a strong effort in placing quantum information within the more fundamental framework of relativistic physics, including general relativity and gravitational effects.
The effect of quantum information on quantum gravity is stronger in the field of black hole physics, where the issue of information loss has been viewed either as a blessing or as a paradox ever since Hawking’s discovery that black holes radiate. It is also important in (quantum) cosmology, especially in relation to the emergence of a classical world (or realized universe) from a quantum description. Additionally, it is directly relevant to the very structure of quantum gravity programs, as researchers try to incorporate physical assumptions that are fundamentally informational (like the holographic principle).
Furthermore, there are new proposals for testing the relation of quantum theory and gravity, not in the very high energies traditionally ascribed to quantum gravity but by exploring the interplay of gravity with quantum entanglement and superposition at large distances. Relevant experiments promise to be within reach in the near future. They include tests of gravity-induced modifications of quantum mechanics; probing gravitational fields generated by quantum sources; understanding the effect of gravity on entanglement; and, in some proposals, even testing whether gravity is fundamentally quantum or not.
Dr. Charis Anastopoulos
Dr. Ntina Savvidou
Guest Editors
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Keywords
- quantum gravity
- entanglement
- superpositions
- decoherence
- quantum cosmology
- quantum information
- black holes
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