Kinetic theory for classical and quantum many-body chaos
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
- Leiden Univ. (Netherlands)
For perturbative scalar field theories, the late-time-limit of the out-of-time-ordered correlation function that measures (quantum) chaos is shown to be equal to a Boltzmann-type kinetic equation that measures the total gross (instead of net) particle exchange between phase-space cells, weighted by a function of energy. This derivation gives a concrete form to numerous attempts to derive chaotic many-body dynamics from ad hoc kinetic equations. A period of exponential growth in the total gross exchange determines the Lyapunov exponent of the chaotic system. Physically, the exponential growth is a front propagating into an unstable state in phase space. As in conventional Boltzmann transport, which follows from the dynamics of the net particle number density exchange, the kernel of this kinetic integral equation for chaos is also set by the 2-to-2 scattering rate. This provides a mathematically precise statement of the known fact that in dilute weakly coupled gases, transport and scrambling (or ergodicity) are controlled by the same physics.
- Research Organization:
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- Grant/Contract Number:
- SC0011090
- OSTI ID:
- 1637335
- Alternate ID(s):
- OSTI ID: 1489861; OSTI ID: 1611575
- Journal Information:
- Physical Review. E, Vol. 99, Issue 1; ISSN 2470-0045
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Reentrant superconductivity in a quantum dot coupled to a Sachdev-Ye-Kitaev metal
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journal | December 2019 |
Recent Developments in the Holographic Description of Quantum Chaos
|
journal | March 2019 |
Scrambling and Lyapunov Exponent in Unitary Networks with Tunable Interactions | text | January 2020 |
Scrambling with conservation law | text | January 2021 |
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