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Entanglement and the thermodynamic arrow of time.
TLDR
It is proved that the occurrence of a transformation between two thermodynamic states constitutes a new type of entanglement witness, one not defined as a separating plane in state space between separable and entangled states, but as a physical process dependent on the local initial properties of the states.
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Description of quantum coherence in thermodynamic processes requires constraints beyond free energy
TLDR
It is shown that free energy relations cannot properly describe quantum coherence in thermodynamic processes, and it is found that coherence transformations are always irreversible.
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Distinct quantum states can be compatible with a single state of reality.
TLDR
This work considers models for quantum systems with measurement outcomes determined by an underlying physical state of the system but where several quantum states are consistent with a single underlying state-i.e., probability distributions for distinct quantum states overlap.
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Quantum coherence, time-translation symmetry and thermodynamics
Quantum mechanics and thermodynamics are fundamental fields of physics. Scientists show how the processing of quantum coherence is constrained by the laws of thermodynamics.
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Quantum steering ellipsoids.
TLDR
It is shown that entanglement can be analyzed in terms of three geometric features of the ellipsoid and proved that a state is separable if and only if it obeys a "nested tetrahedron" condition.
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No return to classical reality
TLDR
This article reviews results on the fundamental phenomena of quantum theory that cannot be understood in classical terms and describes some aspects of quantum physics that can never admit a classical understanding – the intrinsically quantum mechanical aspects of nature.
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The quantum state can be interpreted statistically
The extraction of work from quantum coherence
TLDR
It is shown that for any thermal machine with finite resources not all the coherence of a state can be extracted as work, however, even bounded thermal machines can be reused infinitely many times in the process of work extraction from coherence.
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Photonic implementation for the topological cluster-state quantum computer
An implementation of the topological cluster-state quantum computer is suggested, in which the basic elements are linear optics, measurements, and a two-dimensional array of quantum dots. This…
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Provable quantum advantage in randomness processing.
TLDR
This work addresses a computational scenario of randomness processing in which quantum theory provably yields, not only resource reduction over classical stochastic physics, but a strictly larger class of problems which can be solved.
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