Related papers: Physical origins and limitations of canonical quantum measurement behavior

Physical origins and limitations of canonical quantum measurement behavior

URL: http://arxiv.org/abs/2505.00716v1
Date: Thu, 17 Apr 2025 13:46:05 GMT
Title: Physical origins and limitations of canonical quantum measurement behavior
Abstract summary: I review and augment my work on the physical origins and limitations of canonical quantum measurement behavior.<n>My analysis leads to an emergent, approximate Born rule supported by experiment, with possible breakdown at very small probability density.<n>I argue that a similar picture applies to other measurement scenarios, including Geiger counters, the Stern-Gerlach experiment and superconducting qubits.
Score: 0.0
License: http://creativecommons.org/licenses/by/4.0/
Abstract: I review and augment my work of the last few years on the physical origins and limitations of canonical quantum measurement behavior. Central to this work is a detailed analysis of the microstructure of real measurement devices. Particular attention is paid to the Mott problem, which addresses a simpler version of canonical quantum measurement behavior: It asks why an alpha particle emitted in a nuclear decay produces one and only one track in a cloud chamber. My analysis - entirely consistent with unitarity - leads to an emergent, approximate Born rule supported by experiment, with possible breakdown at very small probability density. I argue that a similar picture applies to other measurement scenarios, including Geiger counters, the Stern-Gerlach experiment and superconducting qubits.

Related papers

Experimental Blueprint for Distinguishing Decoherence from Objective Collapse [0.0]
We propose a levitated optomechanical platform capable of generating controllable Schrodinger-cat states in the center of mass motion of a nanosphere.<n>A comprehensive master equation incorporates gas collisions, black-body radiation, and photon-recoil noise, establishing a calibrated environmental baseline.<n>A Bayesian inference protocol is outlined to discriminate collapse induced excess decoherence from environmental noise.
arXiv Detail & Related papers (2025-12-02T14:47:41Z)
Capturing an Electron in the Virtual State [0.0]
We show that observation reshapes tunneling dynamics, resolving the paradox of detecting a particle in a classically forbidden region.<n>Our results demonstrate that the act of observation fundamentally reshapes tunneling dynamics, resolving the seeming paradox of detecting a particle in a classically forbidden region.
arXiv Detail & Related papers (2025-03-13T05:27:54Z)
A computational test of quantum contextuality, and even simpler proofs of quantumness [43.25018099464869]
We show that an arbitrary contextuality game can be compiled into an operational "test of contextuality" involving a single quantum device. Our work can be seen as using cryptography to enforce spatial separation within subsystems of a single quantum device.
arXiv Detail & Related papers (2024-05-10T19:30:23Z)
Enhanced Entanglement in the Measurement-Altered Quantum Ising Chain [43.80709028066351]
Local quantum measurements do not simply disentangle degrees of freedom, but may actually strengthen the entanglement in the system.<n>This paper explores how a finite density of local measurement modifies a given state's entanglement structure.
arXiv Detail & Related papers (2023-10-04T09:51:00Z)
Observation of partial and infinite-temperature thermalization induced by repeated measurements on a quantum hardware [62.997667081978825]
We observe partial and infinite-temperature thermalization on a quantum superconducting processor. We show that the convergence does not tend to a completely mixed (infinite-temperature) state, but to a block-diagonal state in the observable basis.
arXiv Detail & Related papers (2022-11-14T15:18:11Z)
Schr\"odinger cat states of a 16-microgram mechanical oscillator [54.35850218188371]
The superposition principle is one of the most fundamental principles of quantum mechanics. Here we demonstrate the preparation of a mechanical resonator with an effective mass of 16.2 micrograms in Schr"odinger cat states of motion. We show control over the size and phase of the superposition and investigate the decoherence dynamics of these states.
arXiv Detail & Related papers (2022-11-01T13:29:44Z)
Non-Abelian braiding of graph vertices in a superconducting processor [144.97755321680464]
Indistinguishability of particles is a fundamental principle of quantum mechanics. braiding of non-Abelian anyons causes rotations in a space of degenerate wavefunctions. We experimentally verify the fusion rules of the anyons and braid them to realize their statistics.
arXiv Detail & Related papers (2022-10-19T02:28:44Z)
Qubit Vitrification and Entanglement Criticality on a Quantum Simulator [0.0]
We show that measurements of the qubits in a quantum simulator can lead to criticality, separating two phases of entanglement. Our findings show that measurements alone can trigger entanglement criticality and suggest that coupling to a classical environment can drive critical phenomena in more general quantum states.
arXiv Detail & Related papers (2022-07-27T17:00:18Z)
Experimental observation of thermalization with noncommuting charges [53.122045119395594]
Noncommuting charges have emerged as a subfield at the intersection of quantum thermodynamics and quantum information. We simulate a Heisenberg evolution using laser-induced entangling interactions and collective spin rotations. We find that small subsystems equilibrate to near a recently predicted non-Abelian thermal state.
arXiv Detail & Related papers (2022-02-09T19:00:00Z)
Constraints on probing quantum coherence to infer gravitational entanglement [0.0]
Gravity mediated entanglement generation so far appears to be the key ingredient for a potential experiment. With measurements performed only on the atoms, a coherence revival test is proposed for verifying this entanglement generation. We explore formulations of such a protocol, and specifically find that in the envisioned regime of operation with high thermal excitation, semi-classical models, where there is no concept of entanglement, also give the same experimental signatures.
arXiv Detail & Related papers (2021-06-15T15:29:35Z)
Taking the temperature of a pure quantum state [55.41644538483948]
Temperature is a deceptively simple concept that still raises deep questions at the forefront of quantum physics research. We propose a scheme to measure the temperature of such pure states through quantum interference.
arXiv Detail & Related papers (2021-03-30T18:18:37Z)
Realization of a complete Stern-Gerlach interferometer: Towards a test of quantum gravity [0.0]
The Stern-Gerlach effect, discovered a century ago, has become a paradigm of quantum mechanics. No full-loop Stern-Gerlach interferometer has been realized with the scheme as envisioned decades ago. Here we provide a detailed account of the first full-loop Stern-Gerlach interferometer realization, based on highly accurate magnetic fields.
arXiv Detail & Related papers (2020-11-22T03:56:49Z)
Characterizing quantum correlations in spin chains [0.0]
We show that a single element of the density matrix carries the answer to how quantum is a chain of spins. This method can be used to tailor and witness highly non-classical effects in many-body systems. As a proof of principle, we investigate the extend of non-locality and entanglement in ground states and thermal states of experimentally accessible spin chains.
arXiv Detail & Related papers (2020-05-19T17:25:37Z)
Quantum Zeno effect appears in stages [64.41511459132334]
In the quantum Zeno effect, quantum measurements can block the coherent oscillation of a two level system by freezing its state to one of the measurement eigenstates. We show that the onset of the Zeno regime is marked by a $textitcascade of transitions$ in the system dynamics as the measurement strength is increased.
arXiv Detail & Related papers (2020-03-23T18:17:36Z)

This list is automatically generated from the titles and abstracts of the papers in this site.