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By the method of intense terahertz laser spectroscopy, we provide strongevidence that if an integer quantum Hall (IQH) system has asymmetric confiningpotential and the external quantizing magnetic field has a nonzero in-planecomponent, then a quantum phase may arise with spatially-orderedquasi-one-dimensional orbit-like states similar to the current-carrying edgingstates in conventional IQH system. The emergence of the phase may beinterpreted in terms of a quantum phase transition from the IQH system, whichis accompanied by the breaking of translational symmetry in the direction ofthe in-plane magnetic field. As a result, we get a fully-correlated macroscopicquantum object that gives one a unique opportunity to test the foundations ofquantum mechanics (QM) at a macroscopic level. In particular, by means of thisobject, we show experimentally that the concept of quantum spatial dynamics ofelectrons without a definable trajectory remains relevant in the macro-world inaccordance with the foundations of standard QM while an alternative descriptionof such dynamics in terms of so-called Bohmian trajectories appears untenable.

Evidence for a quantum phase with macroscopic orbit-like quantum states similar to the current-carrying edging states in integer quantum Hall system