Physical Review A

LETTERGoos-Hnchen shift at a temporal boundary

While GoosHnchen effects at spatial boundaries have been well studied, light-matter interactions at temporal boundaries have only recently become a subject of interest. Here, the authors develop a theory of time shifts for pulses reflected from a moving temporal boundary in a dispersive medium, and reveal the importance of the relative velocities of the pulse and boundary.

Sergey A. Ponomarenko, Junchi Zhang, and Govind P. AgrawalPhys. Rev. A 106, L061501 (2022)

Efficient molecular orientation at high temperatures is induced by a terahertz pulse with the help of an intense nonresonant laser prepulse that dissects rotational phase space to narrow filaments. The authors use the echo effect to synchronize the terahertz response of all the filaments, leading to much enhanced orientation compared to other techniques.

Ilia Tutunnikov, Long Xu, Yehiam Prior, and Ilya Sh. AverbukhPhys. Rev. A 106, L061101 (2022)

The authors study a system of N nonrelativistic particles which form a near-threshold resonance. They find that some many-body quantum objects, for example, clusters of about 30 3He atoms, while being metastable, cannot decay through emission of one particle at a time. Rather, they decay via a spontaneous mini-explosion where all the constituent atoms are released at once.

Dam Thanh Son, Mikhail Stephanov, and Ho-Ung YeePhys. Rev. A 106, L050801 (2022)

The coming era of quantum computing promises to revolutionize computation, but, given the efficiency of many classical routines as well as quantum hardware limitations, calls to quantum devices are and will continue to be used as subroutines in larger, hybrid quantum-classical algorithms. This Perspective explores the essential differences between pure and hybrid quantum algorithms, discusses some examples, and frames the future of hybrid quantum-classical algorithms in its natural context of classical heterotic computing.

Adam Callison and Nicholas ChancellorPhys. Rev. A 106, 010101 (2022)

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Physical Review A