from
Sat Aug 12 2023 04:47:17 (14 hours)
# 1.
Horvat, Sebastian and Toader, Iulian Danut (2023) An Alleged Tension between Quantum Logic and Applied Classical Mathematics. [Preprint]
Send To > Keep unreadDelete
from
Sat Aug 12 2023 04:46:52 (14 hours)
# 2.
Horvat, Sebastian and Toader, Iulian Danut (2023) Quantum logic and meaning. [Preprint]
Send To > Keep unreadDelete
from
by
Zhiyuan Wang, Kaden R. A. Hazzard
Fri Aug 11 2023 12:20:04 (1 day)
# 3.
It is commonly believed that there are only two types of particle exchange statistics in quantum mechanics, fermions and bosons, with the exception of anyons in two dimension. In principle, a second exception known as parastatistics, which extends outside of two dimensions, has been considered but was believed to be physically equivalent to fermions and bosons. In this paper we show that nontrivial parastatistics inequivalent to either fermions or bosons can exist in physical systems. These new types of identical particles obey generalized exclusion principles, leading to exotic free-particle thermodynamics distinct from any system of free fermions and bosons. We formulate our theory by developing a second quantization of paraparticles, which naturally includes exactly solvable non-interacting theories, and incorporates physical constraints such as locality. We then construct a family of one-dimensional quantum spin models where free parastatistical particles emerge as quasiparticle excitations. This demonstrates the possibility of a new type of quasiparticle in condensed matter systems, and, more speculatively, the potential for previously unconsidered types of elementary particles.
Send To > Keep unreadDelete
from
by
Ricardo R. Ancheyta
Fri Aug 11 2023 12:19:58 (1 day)
# 4.
The nonadiabatic dynamic of the electromagnetic field triggers photons generation from the quantum vacuum. Shortcuts to adiabaticity, instead, are protocols that mimic the field’s adiabatic dynamic in a finite time. Here, we show how the counterdiabatic term of the transitionless tracking algorithm cancels out, exactly, the term responsible for the photon production in the dynamical Casimir effect. This result suggests that the energy of producing photons out of the vacuum is related to the energetic cost of the shortcut. Furthermore, if the system operates under a quantum thermodynamic cycle, we confirm the equivalence between the adiabatic and nonadiabatic work outputs. Finally, our study reveals that identifying these unreported observations can only be possible using the so-called effective Hamiltonian approach.
Send To > Keep unreadDelete
from
by
Don Weingarten
Fri Aug 11 2023 12:19:52 (1 day)
# 5.
Beginning with the Everett-DeWitt many-worlds interpretation of quantum mechanics, there have been a series of proposals for how the state vector of a quantum system might split at any instant into orthogonal branches, each of which exhibits approximately classical behavior. In an earlier version of the present work, we proposed a decomposition of a state vector into branches by finding the minimum of a measure of the mean squared quantum complexity of the branches in the branch decomposition. Here we define a formulation of quantum complexity for quantum electrodynamics on a lattice in Minkowski space. With respect to a particular Lorentz frame, for a system beginning in a state of low complexity, branching occurs repeatedly over time with each branch splitting successively into further sub-branches among which the branch followed by the real world is chosen according to the Born rule. Alternatively, in an explicitly Lorentz covariant formulation, the real world is a single random draw from the set of branches at asymptotically late time, which can then be restored to finite time in a particular Lorentz frame by sequentially retracing the set of branching events implied by the late time choice. The earlier version here is simplified by replacing a definition of complexity based on the physical vacuum with a definition based on the bare vacuum. As a consequence of this replacement, the physical vacuum itself is predicted to branch yielding branches with energy densities slightly larger than that of the unbranched vacuum. If the vacuum energy renormalization constant is chosen as usual to give 0 energy density to the unbranched vacuum, vacuum branches will appear to have a combination of dark energy and dark matter densities but no additional particle content.
Send To > Keep unreadDelete
from
Fri Aug 11 2023 01:46:49 (1 day)
# 6.
Wuthrich, Christian (2023) The philosophy of causal set theory. [Preprint]
Send To > Keep unreadDelete
from
Fri Aug 11 2023 01:46:11 (1 day)
# 7.
Lam, Vincent and Wuthrich, Christian (2023) Laws beyond spacetime. [Preprint]
Send To > Keep unreadDelete
from
by
André Luís Peixoto Considera and Simon Thalabard
Thu Aug 10 2023 18:00:00 (2 days)
# 8.
Author(s): André Luís Peixoto Considera and Simon Thalabard
Spontaneous stochasticity is a modern paradigm for turbulent transport at infinite Reynolds numbers. It suggests that tracer particles advected by rough turbulent flows and subject to additional thermal noise, remain nondeterministic in the limit where the random input, namely, the thermal noise, va…
[Phys. Rev. Lett. 131, 064001] Published Thu Aug 10, 2023
Send To > Keep unreadDelete
from
by
Lorenzo Catani, Matthew Leifer, Giovanni Scala, David Schmid, and Robert W. Spekkens
Thu Aug 10 2023 18:00:00 (2 days)
# 9.
Author(s): Lorenzo Catani, Matthew Leifer, Giovanni Scala, David Schmid, and Robert W. Spekkens
The authors show that a certain wave-particle duality relation is a type of uncertainty relation whose functional form is known to be able to witness the impossibility of a noncontextual model. In this way, they show that the quantum trade-off between path distinguishability and fringe visibility can witness contextuality and they discuss the requirements on an interferometric experiment necessary for achieving a noise-robust test.
[Phys. Rev. A 108, 022207] Published Thu Aug 10, 2023
Send To > Keep unreadDelete
from
by
Katherine Wright
Thu Aug 10 2023 18:00:00 (2 days)
# 10.
Author(s): Katherine Wright
The Muon g-2 Collaboration has doubled the precision of their 2021 measurement of the muon’s magnetic moment, strengthening a tension with predictions based on the standard model.
[Physics 16, 139] Published Thu Aug 10, 2023
Send To > Keep unreadDelete
from
by
A. Metelmann
Thu Aug 10 2023 08:00:00 (2 days)
# 11.
Nature Physics, Published online: 10 August 2023; doi:10.1038/s41567-023-02138-9
A milestone for the coherence time of a macroscopic mechanical oscillator may be a crucial advance for enabling the development of quantum technologies based on optomechanical architectures and for fundamental tests of quantum mechanics.
Send To > Keep unreadDelete
from
Thu Aug 10 2023 02:04:48 (2 days)
# 12.
Weinstein, Galina (2023) Revisiting Nancy Cartwright’s Notion of Reliability: Addressing Quantum Devices’ Noise. [Preprint]
Send To > Keep unreadDelete
from
Thu Aug 10 2023 02:03:43 (2 days)
# 13.
Ben-Yami, Hanoch (2023) The Structure of Space and Time, and the Indeterminacy of Classical Physics. UNSPECIFIED.
Send To > Keep unreadDelete
from
Thu Aug 10 2023 01:51:37 (2 days)
# 14.
Manchak, JB and Barrett, Thomas William (2023) A Hierarchy of Spacetime Symmetries: Holes to Heraclitus. [Preprint]
Send To > Keep unreadDelete
from
by
Seiji Miyashita and Bernard Barbara
Wed Aug 09 2023 18:00:00 (3 days)
# 15.
Author(s): Seiji Miyashita and Bernard Barbara
Irradiating a uniaxial magnetic system with a specific sequence of microwave pulses can induce in the system quantum oscillations that cause the material’s spins to flip back and forth.
[Phys. Rev. Lett. 131, 066701] Published Wed Aug 09, 2023
Send To > Keep unreadDelete
from
by
Artemy Kolchinsky
Mon Aug 07 2023 18:00:00 (5 days)
# 16.
Author(s): Artemy Kolchinsky
Calculations of the minimum energy a cell requires to transmit a signal between two internal components could help scientists understand how energy and information combine to produce living systems.
[Physics 16, 133] Published Mon Aug 07, 2023
