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Inestabilidad estructural inducida por disipación y dinámica quiral en un gas cuántico
Nishant Dogra1, Manuele Landini1, Katrin Kroeger1
1Institute for Quantum Electronics, ETH Zurich, CH-8093 Zurich, Switzerland.
Science (New York, N.Y.)
|December 21, 2019
Resumen
Los investigadores observaron un estado no estacionario quiral en un sistema sintético de muchos cuerpos. Este estado, que surge de acoplamientos unitarios y disipativos controlados en un gas espinor de Bose, se relaciona con la inestabilidad de posición.
Área de la Ciencia:
- La física cuántica
- Física atómica
- Sistemas de muchos cuerpos
Sus antecedentes:
- Los sistemas de muchos cuerpos evolucionan a través de procesos dissipativos y unitarios.
- La interacción de estos procesos puede causar transiciones de fase dinámicas e inestabilidades.
Objetivo del estudio:
- Observar y caracterizar un estado quiral no estacionario en un sistema sintético de muchos cuerpos.
- Investigar el papel de los acoplamientos unitarios y disipativos controlables de forma independiente.
Principales métodos:
- Experimento en el que se utiliza un gas spinor Bose que interactúa con un resonador óptico.
- Utilizando cuadraturas ortogonales del campo del resonador para el acoplamiento coherente.
- Utilizando las pérdidas del resonador para el acoplamiento disipatorio entre los modos espaciales atómicos.
Principales resultados:
- Observación de un estado no estacionario con características quirales.
- Demostración de acoplamientos unitarios y disipadores controlables de forma independiente.
- En un régimen de disipación dominante, se observó la evolución quiral y se relacionó con la inestabilidad posicional.
Conclusiones:
- Los sistemas de muchos cuerpos sintéticos ofrecen una plataforma para estudiar fenómenos cuánticos complejos.
- La disipación controlable puede impulsar la dinámica quiral y las inestabilidades en los sistemas cuánticos.
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