singlet

(redirected from Singlet state)
Also found in: Dictionary, Thesaurus, Medical.

singlet

1. Physics a multiplet that has only one member
2. Chem a chemical bond consisting of one electron

singlet

[′siŋ·glət]
(quantum mechanics)
An energy level that is not split by a relatively weak interaction, and thus is not a multiplet or a member of a multiplet.
(spectroscopy)
A spectral line that cannot be resolved into components at even the highest resolution.
References in periodicals archive ?
Almost infinite set of claims for health benefits Carotenoids * Lycopene * Singlet state "SI" is the oxidized form * [beta]-Carotene * Ouenches free radicals by accepting energy * [alpha]-Carotene from singlet oxygen, not necessarily * [beta]-Cryptoxanthin transferring electrons, and radiating the * Lutein excess energy off as heat.
But now recall the superposition principle, and consider the singlet state, which can be represented as
But we have what is known as a quantum correlation of the two systems; in the singlet state each possible spin-up state of electron 1 is said to be correlated with the corresponding spin-down state of electron 2, and conversely.
The process is related to excitation of benzophenone (BP) by far UV radiation (250 nm) to a singlet state [S.
In that case, the perfect anticorrelations predicted by QM for the spin singlet state would quite possibly fail.
In theorem 1, we consider two well-separated spin-1 particles in the spin singlet state
On the other hand, the Kondo effect favors the formation of singlet states between localized moments and conduction electrons generating a non-magnetic ground state.
Potential energy surfaces were calculated for the singlet states derived from the [[pi].
Highly conjugated molecules such a parphyrins have low-lying excited singlet states that can be excited by light in the 600 to 800 nm region, corresponding to the wavelengths that transmit quite deeply into human tissues.