Quantum 8, 1223 (2024). https://doi.org/10.22331/q-2024-01-10-1223 Quantum mechanics does not provide any ready recipe for defining energy density in space, since the energy and coordinate do not commute. To find a well-motivated energy density, we start […]
Quantum 8, 1222 (2024). https://doi.org/10.22331/q-2024-01-10-1222 In this paper we aim to push the analogy between thermodynamics and quantum resource theories one step further. Previous inspirations were based predominantly on thermodynamic considerations concerning scenarios with a […]
Quantum 8, 1221 (2024). https://doi.org/10.22331/q-2024-01-10-1221 Ground states of local Hamiltonians are of key interest in many-body physics and also in quantum information processing. Efficient verification of these states are crucial to many applications, but very […]
Quantum 8, 1220 (2024). https://doi.org/10.22331/q-2024-01-10-1220 There is a folkloric belief that a depth-$Theta(m)$ quantum circuit is needed to estimate the trace of the product of $m$ density matrices (i.e., a multivariate trace), a subroutine crucial […]
Quantum 8, 1219 (2024). https://doi.org/10.22331/q-2024-01-04-1219 Utilizing quantum computer to investigate quantum chemistry is an important research field nowadays. In addition to the ground-state problems that have been widely studied, the determination of excited-states plays a […]
Quantum 8, 1218 (2024). https://doi.org/10.22331/q-2024-01-04-1218 The amount of information that a noisy channel can transmit has been one of the primary subjects of interest in information theory. In this work we consider a practically-motivated family […]
Quantum 8, 1217 (2024). https://doi.org/10.22331/q-2024-01-03-1217 The notion of macrorealism was introduced by Leggett and Garg in an attempt to capture our intuitive conception of the macroscopic world, which seems difficult to reconcile with our knowledge […]
Quantum 8, 1216 (2024). https://doi.org/10.22331/q-2024-01-02-1216 In this homage to Einstein’s 144th birthday we propose a novel quantization prescription, where the paths of a path-integral are not random, but rather solutions of a geodesic equation in […]
Quantum 7, 1215 (2023). https://doi.org/10.22331/q-2023-12-28-1215 We present a new framework for assessing the power of measurement-based quantum computation (MBQC) on short-range entangled symmetric resource states, in spatial dimension one. It requires fewer assumptions than previously […]
Quantum 7, 1214 (2023). https://doi.org/10.22331/q-2023-12-21-1214 Operator controllability refers to the ability to implement an arbitrary unitary in SU(N) and is a prerequisite for universal quantum computing. Controllability tests can be used in the design of […]
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