Superconducting circuits based on Josephson junctions exhibit macroscopic quantum
coherence and can behave like artificial atoms. Recent technological advances have made …

This paper starts with a brief review of the topic of strong and weak pre-and post-selected
(PPS) quantum measurements, as well as weak values, and afterwards presents original …

Starting from a state of low quantum entanglement, local unitary time evolution increases the
entanglement of a quantum many-body system. In contrast, local projective measurements …

In quantum physics, measurements can fundamentally yield discrete and random results.
Emblematic of this feature is Bohr's 1913 proposal of quantum jumps between two discrete …

We study the entanglement entropy of the quantum trajectories of a free fermion chain under
continuous monitoring of local occupation numbers. We propose a simple theory for …

The length of time that a quantum system can exist in a superposition state is determined by
how strongly it interacts with its environment. This interaction entangles the quantum state …

Measuring a quantum system can randomly perturb its state. The strength and nature of this
back-action depend on the quantity that is measured. In a partial measurement performed by …

Quantum phase transitions are usually studied in terms of Hermitian Hamiltonians. However,
cold-atom experiments are intrinsically non-Hermitian because of spontaneous decay. Here …

In quantum mechanics, the process of measurement is a subtle interplay between extraction
of information and disturbance of the state of the quantum system. A quantum non …

We show that qubit decoherence due to zero-temperature energy relaxation can be almost
completely suppressed by using the quantum uncollapsing (measurement reversal) …