Quantum Mechanical Position Operator and Localization in Extended Systems
نویسندگان
چکیده
منابع مشابه
The quantum-mechanical position operator and the polarization problem
The position operator (defined within Schrödinger representation as usual) becomes meaningless when the usual Born-von Kármán periodic boundary conditions are adopted: this fact is at the root of the polarization problem. I show how to define the position expectation value by means of rather peculiar many–body (multiplicative) operator acting on the wavefunction of the extended system. This def...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 1999
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.82.2560