Impulsively Excited Gravitational Quantum States: Echoes and Time-Resolved Spectroscopy

Autor: Valery Nesvizhevsky, K. V. Rajitha, A. Yu. Voronin, Ilia Tutunnikov, I. Sh. Averbukh
Přispěvatelé: Institut Laue-Langevin (ILL), ILL
Rok vydání: 2020
Předmět:
wave function
Physics - Instrumentation and Detectors
Atomic Physics (physics.atom-ph)
Population
General Physics and Astronomy
FOS: Physical sciences
01 natural sciences
Physics - Atomic Physics
Gravitation
High Energy Physics - Phenomenology (hep-ph)
Quantum state
0103 physical sciences
excited state
surface
transition: frequency
[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]
010306 general physics
Wave function
education
Quantum
Physics
education.field_of_study
Quantum Physics
etc
General Physics: Statistical and Quantum Mechanics
010308 nuclear & particles physics
atom
Observable
Instrumentation and Detectors (physics.ins-det)
pulsed
[PHYS.PHYS.PHYS-GEN-PH]Physics [physics]/Physics [physics]/General Physics [physics.gen-ph]
High Energy Physics - Phenomenology
gravitation
Excited state
[PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph]
Ultracold neutrons
Quantum Information
Atomic physics
Quantum Physics (quant-ph)
Zdroj: Physical Review Letters
Physical Review Letters, American Physical Society, 2021, 126 (17), pp.170403. ⟨10.1103/PhysRevLett.126.170403⟩
ISSN: 1079-7114
0031-9007
DOI: 10.1103/PhysRevLett.126.170403⟩
Popis: We theoretically study an impulsively excited quantum bouncer (QB) - a particle bouncing off a surface in the presence of gravity. A pair of time-delayed pulsed excitations is shown to induce a wave-packet echo effect - a partial rephasing of the QB wave function appearing at twice the delay between pulses. In addition, an appropriately chosen observable [here, the population of the ground gravitational quantum state (GQS)] recorded as a function of the delay is shown to contain the transition frequencies between the GQSs, their populations, and partial phase information about the wave packet quantum amplitudes. The wave-packet echo effect is a promising candidate method for precision studies of GQSs of ultra-cold neutrons, atoms, and anti-atoms confined in closed gravitational traps.
7 pages, 6 figures
Databáze: OpenAIRE
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