Since unitarity is fundamental to field theory, this result had a certain importance. ❋ Unknown (1988)
Until now, unitarity triangle measurements have been maddeningly consistent with the amount of CP violation predicted by the standard model alone. ❋ Unknown (2008)
Any such theory that retains unitarity would require, for example, that each of the patches into which a de Sitter region evolves be different in some way from the original patch, such that they individually have fewer degrees of freedom. ❋ Sean (2008)
Since there are more such regions, it would appear that the total number of degrees of freedom has increased, in violation of unitarity. ❋ Sean (2008)
When the system S+O is considered from the point of view of O², the measurement can be seen as an interaction whose dynamics is fully unitary, whereas by the point of view of O the measurement breaks the unitarity of the evolution of S. ❋ Laudisa, Federico (2008)
So, why should a quantum theory of gravity retain unitarity? ❋ Sean (2008)
What will be tested are general properties of unitarity, analyticity, and lorentz invariance-properties that are not unique to string theory. ❋ Unknown (2007)
And then the problem is that either the entropy is decreasing during that collapse, for no good reason and in contradiction with everything we think we know about gravitational dynamics, or it is increasing during the collapse, yet supposedly gives rise to an extraordinarily low-entropy condition on the other side, for no good reason and in contradiction with everything we think we know about unitarity and thermodynamics. ❋ Sean (2007)
There are many known examples: Lagrangian theory, thermal properties, foundations of quantum formalism, unitarity, all the crackpotism about Landscape and CC, epiroktic scenarios, etc. ❋ Sean (2006)
The unitarity theorem would break down, thus signaling Quantum Mechanics needs to be overhauled! ❋ JoAnne (2006)
To prevent this breakdown of unitarity, either the Higgs boson or the Kaluza-Klein gauge bosons (that come from other theories) need to be discovered. ❋ JoAnne (2006)
From the WW scattering cross section, we know that the unitarity of the optical theory breaks down at 1.7 TeV. ❋ JoAnne (2006)
I can shed some light on the issue of unitarity at finite cutoff. ❋ Cjohnson (2006)
So, when computing physical quantities, the unphysical fields serve only to regularize the physical theory, and do not spoil unitarity. ❋ Cjohnson (2006)
Just in the last 45 minutes at the lab today, I explained unitarity violation in high energy WW scattering to two very inquisitive students and immediately afterwards was invited to CERN by one of the lecturers for the start of the LHC run. ❋ JoAnne (2006)
So today they started with (technical stuff coming up) examining the properties of a particular conformal minimal model - the Lee-Yang model - and I tested their conformal field theory knowledge by getting them to extract the scaling operator dimensions from the Kac table, and deducing various properties of the model from that …. critical exponents, non-unitarity, etc. ❋ Cjohnson (2005)
[…] So today they started with (technical stuff coming up) examining the properties of a particular conformal minimal model - the Lee-Yang model - and I tested their conformal field theory knowledge by getting them to extract the scaling operator dimensions from the Kac table, and deducing various properties of the model from that …. critical exponents, non-unitarity, etc. ❋ Cjohnson (2005)
Such a mixed state in the far future violates unitarity - pure states cannot evolve into mixed states unitarily - and it destroys the initial information about the collapsed objects which is why we call it “information loss puzzle”. ❋ Mark (2005)
In any case, unitarity has nothing to do with teleology, and less than nothing to do with intelligent design. ❋ Unknown (2005)
Previously, a Berkeley experiment had searched in vain for this decay and had claimed an upper limit in violation of unitarity. ❋ Unknown (1988)
Praise Unitar! He/she [doth] will [have mercy] upon the [aging] hippies of the world. ❋ Ericurus (2006)
