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Theory of Quantum Bose Liquids Beyond Bogoliubov Approximation
0 - Default Title
Description
Topics include the distinction between quantum gases and liquids, the role of the chemical potential in ultracold systems, and the historical and theoretical development of interacting Bose gases since the early work of Bogoliubov. The limitations of Bogoliubov theory-particularly its applicability to weakly interacting systems and neglect of finite-temperature effects-are discussed, along with recent advances such as the Lee-Huang-Yang (LHY) correction and the emergence of quantum droplets in two-component Bose mixtures.
The book introduces field-theoretical methods for many-body systems, covering spontaneous symmetry breaking, Green functions, Matsubara formalism, and path integrals. A central focus is the application of Optimized Perturbation Theory (OPT), also known as the variational Gaussian approximation or linear delta expansion, to atomic BECs and quantum magnets (triplons). Theoretical developments are complemented by a brief overview of experimental methods.
Product details
Binding:
Paperback
Number of Pages:
292
Release Date:
2026-01-03
Publication Date:
2026-01-03
Publisher:
Springer
Languages:
Original:
English
ISBN10:
3032050952
ISBN13:
9783032050953
GPSR Manufacturer Reference:
Weight:
446 g
Height:
155 cm
Width:
235 cm
Thickness:
16 cm
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