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Particle number operator

Known as: Number operator, Particle number operators 
In quantum mechanics, for systems where the total number of particles may not be preserved, the number operator is the observable that counts the… Expand
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Papers overview

Semantic Scholar uses AI to extract papers important to this topic.
Highly Cited
2009
Highly Cited
2009
We propose and investigate an optical scheme for probabilistic implementation of an arbitrary single-mode quantum operation that… Expand
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2005
2005
The problem of the choice of tensor product decomposition in a system of two fermions with the help of Bogoliubov transformations… Expand
Highly Cited
2003
Highly Cited
2003
The generation of an entangled coherent state is one of the most important ingredients of quantum information processing using… Expand
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2002
2002
In this paper, we recast the fermionic ghost sector of Witten's open bosonic string field theory in the language of… Expand
Highly Cited
1999
Highly Cited
1999
We derive a $U$-duality invariant formula for the degeneracies of BPS multiplets in a D1-D5 system for toroidal compactification… Expand
1995
1995
Abstract RIVER3 is an ANSI standard FORTRAN-77 numerical model that simulates the discharge and sediment load of rivers. From… Expand
Highly Cited
1989
Highly Cited
1989
A new realisation of the quantum group SUq(2) is constructed by means of a q-analogue to the Jordan-Schwinger mapping… Expand
1989
1989
The cutoff rate R/sub 0/ of an optical channel transmitting M-ary phase-shift-keyed coherent states is calculated for a receiver… Expand
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Highly Cited
1985
Highly Cited
1985
The authors calculate the spectrum of the S5 compactification of the chiral N=2, D=10 supergravity theory. The modes on S5 fall… Expand
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Review
1968
Review
1968
The quantum-mechanical description of phase and angle variables is reviewed, with emphasis on the proper mathematical description… Expand