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Entropy from Entanglement in Quantum State Reduction
Lisa Lenstra, Jasper van Wezel
The Von Neumann entropy of reduced states is a measure of bipartite entanglement. Despite its name, the entanglement entropy cannot by itself be used as a resource for creating the…
Continuous spontaneous localization as the white-noise limit of spontaneous unitarity violation
Aritro Mukherjee, Jasper van Wezel
Objective collapse theories propose modifications to Schrödinger's equation that solve the quantum measurement problem by interpolating between microscopic quantum dynamics and pro…
Colored noise driven unitarity violation causing dynamical quantum state reduction
Aritro Mukherjee, Jasper van Wezel
Unitarity violations were recently proposed as a cause of objective quantum state reduction. This complements proposals based on stochastic modifications of Schrodinger's equation,…
Environment-assisted invariance does not necessitate Born's rule for quantum measurement
Lotte Mertens, Jasper van Wezel
The argument of environment-assisted invariance (known as envariance) implying Born's rule is widely used in models for quantum measurement to reason that they must yield the corre…
Quantum state reduction of general initial states through spontaneous unitarity violation
Aritro Mukherjee, Srinivas Gotur, Jelle Aalberts +3
The inability of Schrodinger's unitary time evolution to describe measurement of a quantum state remains a central foundational problem. It was recently suggested that the unitarit…
An objective collapse model without state dependent stochasticity
Lotte Mertens, Matthijs Wesseling, Jasper van Wezel
The impossibility of describing measurement in quantum mechanics while using a quantum mechanical model for the measurement machine, remains one of its central problems. Objective…
Variational quantum eigensolver for the Heisenberg antiferromagnet on the kagome lattice
Joris Kattemölle, Jasper van Wezel
Establishing the nature of the ground state of the Heisenberg antiferromagnet (HAFM) on the kagome lattice is well known to be a prohibitively difficult problem for classical compu…
An instability of unitary quantum dynamics
Jasper van Wezel
Instabilities of equilibrium quantum mechanics are common and well-understood. They are manifested for example in phase transitions, where a quantum system becomes so sensitive to…
Broken Time Translation Symmetry as a model for Quantum State Reduction
Jasper van Wezel
The symmetries that govern the laws of nature can be spontaneously broken, enabling the occurrence of ordered states. Crystals arise from the breaking of translation symmetry, magn…
Observing the Spontaneous Breakdown of Unitarity
Jasper van Wezel
During the past decade, the experimental development of being able to create ever larger and heavier quantum superpositions has brought the discussion of the connection between mic…
Schrodinger-Newton equation as a possible generator of quantum state reduction
Jasper van Wezel, Jeroen van den Brink
It has been suggested by Diosi and Penrose that the occurrence of quantum state reduction in macroscopic objects is related to a manifestation of gravitational effects in quantum m…