Compact operator for which a finite trace can be defined
In mathematics, specifically functional analysis, a trace-class operator is a linear operator for which a trace may be defined, such that the trace is a finite number independent of the choice of basis used to compute the trace. This trace of trace-class operators generalizes the trace of matrices studied in linear algebra. All trace-class operators are compact operators.
In quantum mechanics, mixed states are described by density matrices, which are certain trace class operators.
Trace-class operators are essentially the same as nuclear operators, though many authors reserve the term "trace-class operator" for the special case of nuclear operators on Hilbert spaces and use the term "nuclear operator" in more general topological vector spaces (such as Banach spaces).
Note that the trace operator studied in partial differential equations is an unrelated concept.
to compute the trace. This trace of trace-class operators generalizes the trace of matrices studied in linear algebra. All trace-class operators are compact...
Look up Trace, trace, traces, or tracing in Wiktionary, the free dictionary. Trace may refer to: Trace (Son Volt album), 1995 Trace (Died Pretty album)...
analysis, the partial trace is a generalization of the trace. Whereas the trace is a scalar valued function on operators, the partial trace is an operator-valued...
operators on an infinite dimensional Hilbert space we require that they be traceclass and self-adjoint, in which case similar definitions apply, but we discuss...
density operator S, which is a non-negative, self-adjoint, trace-class operator of trace 1 on the Hilbert space H describing the quantum system. This...
spaces such operators are usually called traceclass operators and one can define such things as the trace. In Banach spaces this is no longer possible...
micronutrients. The two types of trace element in biochemistry are classed as essential or non-essential. An essential trace element is a dietary element...
Trace Lysette (born 2 October 1981) is an American actress whose most notable roles include Shea in the television series Transparent (2014–2019) and...
Schatten–von-Neumann norm) arises as a generalization of p-integrability similar to the traceclass norm and the Hilbert–Schmidt norm. Let H 1 {\displaystyle H_{1}} , H...
operators on a Hilbert space which differ from the identity operator by a trace-class operator. The function is named after the mathematician Erik Ivar Fredholm...
operator. In particular, it is a compact operator of traceclass, that is, it has finite trace. Even more generally, for a probability measure P on a...
larger than the space of traceclass operators. Dixmier traces are examples of singular traces. Some applications of Dixmier traces to noncommutative geometry...
generated by the Hermitian trace-class operators, with the trace norm. A mixed state ρ is separable if it can be approximated, in the trace norm, by states of...
In computing, a stack trace (also called stack backtrace or stack traceback) is a report of the active stack frames at a certain point in time during...
In mathematics, the Selberg trace formula, introduced by Selberg (1956), is an expression for the character of the unitary representation of a Lie group...
In mathematics, the trace operator extends the notion of the restriction of a function to the boundary of its domain to "generalized" functions in a Sobolev...
Hilbert spaces and traceclass operators, which are easier to understand. (On Hilbert spaces nuclear operators are often called traceclass operators.) We...
2nd Schatten class is in fact the Hilbert space of Hilbert–Schmidt operators. Moreover, the 1st Schatten class is the space of traceclass operators....
Tracor was a major North American defense electronics contractor which was acquired by Marconi Electronic Systems (MES), a subsidiary of General Electric...
Fredholm determinant defines the determinant for operators known as traceclass operators by an appropriate generalization of the formula det ( I + A...
theorem for traces explicitly identifies the commutant of a specific von Neumann algebra acting on a Hilbert space in the presence of a trace. The first...
example, the predual of the space of bounded operators is the space of traceclass operators, and the predual of the space L∞(R) of essentially bounded...