Bayat, A;
Alkurtass, B;
Sodano, P;
Johannesson, H;
Bose, S;
(2018)
Measurement Quench in Many-Body Systems.
Physical Review Letters
, 121
, Article 030601. 10.1103/PhysRevLett.121.030601.
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Abstract
Measurement is one of the key concepts which discriminates classical and quantum physics. Unlike classical systems, a measurement on a quantum system typically alters it drastically as a result of wave function collapse. Here we suggest that this feature can be exploited for inducing quench dynamics in a many-body system while leaving its Hamiltonian unchanged. Importantly, by doing away with dedicated macroscopic devices for inducing a quench—using instead the indispensable measurement apparatus only—the protocol is expected to be easier to implement and more resilient against decoherence. By way of various case studies, we show that our scheme also has decisive advantages beyond reducing decoherence—for spectroscopy purposes and probing nonequilibrium scaling of critical and quantum impurity many-body systems.
| Type: | Article |
|---|---|
| Title: | Measurement Quench in Many-Body Systems |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.121.030601 |
| Publisher version: | https://doi.org/10.1103/PhysRevLett.121.030601 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Science & Technology, Physical Sciences, Physics, Multidisciplinary, Physics, QUANTUM RENORMALIZATION-GROUPS, ATOMIC MOTT INSULATOR, PHASE-TRANSITION, KONDO PROBLEM, TRAPPED IONS, DYNAMICS, MODEL, EQUILIBRIUM, PROPAGATION, MECHANICS |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10054670 |
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