A shortcut to adiabaticity (STA) offers a fast route to quantum state preparation, similar to how a toll road offers a fast route to a traveler’s destination; both shortcuts involve costs, but the costs are hopefully worth the time saved. (The image depicts a road sign produced by the Swedish Transport Agency.)
Topics: Adiabatic Processes, Computers, Consumer Electronics, Cryptography, Quantum Mechanics
Quantum technologies come in a wide variety of forms, from computers, sensors, and cryptographic systems to simulations and imaging systems. But one thing that all current and future quantum systems have in common is the need to achieve reliable control over physical systems such as atoms or photons. A frequently used method to prepare quantum systems in the desired quantum state is a quantum adiabatic process, but these processes often take so long that environmental noise causes the quantum state to decohere and lose its "quantumness."
To speed up quantum state preparation and minimize decoherence, physicists have devised so-called "shortcuts to adiabaticity" (STA), which refer to any process that prepares quantum states in a shorter time than adiabatic processes without losing the benefits of being adiabatic. Originally developed for simple systems consisting of a single particle, STA has recently been extended to many-body systems, which are more relevant for applications. However, the implementation of STA in many-body systems is still very challenging due to the inherent complexity of these systems.
Phys.org: Quantum shortcut could speed up many quantum technologies, Lisa Ziga
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