We study the effects of relativistic motion on quantum teleportation and propose a realizable experiment where our results can be tested. compute bounds optimal fidelity when one observers undergoes nonuniform for finite time. The upper bound to is degraded due observer's motion. However, we discuss how this degradation corrected. These are observable experimental parameters that within reach cutting-edge superconducting technology.

We propose a digital quantum simulator of non-Abelian pure-gauge models with superconducting circuit setup. Within the framework link models, we build minimal instance pure SU(2) gauge theory, using triangular plaquettes involving geometric frustration. This realization is least demanding, in terms simulation resources, dynamics. present two architectures that can host simulation, estimating requirements needed to run possible experiments. The proposal establishes path experimental physics...

We introduce a primary thermometer which measures the temperature of Bose-Einstein Condensate in sub-nK regime. show, using quantum Fisher information, that precision our technique improves state-of-the-art thermometry The condensate is mapped onto phase an atomic dot interacts with system for short times. show highest achieved when dynamical rather than geometric and it detected through Ramsey interferometry. Standard techniques to determine involve indirect estimation mean particle...

A quantum simulator is a device engineered to reproduce the properties of an ideal model. It allows study systems that cannot be efficiently simulated on classical computers. While universal computer also simulator, only particular have been up now. Still, there wealth successful cases, such as spin models, chemistry, relativistic physics and phase transitions. Here, we show how design for Majorana equation, non-Hamiltonian wave equation might describe neutrinos other exotic particles beyond...

We propose a realistic circuit QED experiment to test the extraction of past-future vacuum entanglement pair superconducting qubits. The qubit P interacts with quantum field along an open transmission line for interval T(on) and then, after time-lapse T(off), F starts interacting time in symmetric fashion. After that, correlations will have transferred qubits, even if qubits do not coexist at same time. show that this can be realized current technology discuss its utility as possible...

We show that gravitational waves create phonons in a Bose-Einstein condensate (BEC). A traveling spacetime distortion produces particle creation resonances correspond to the dynamical Casimir effect BEC phononic field contained cavity-type trap. propose use this detect waves. The amplitude of wave can be estimated applying recently developed relativistic quantum metrology techniques. provide optimal precision bound on estimation wave's amplitude. Finally, we parameter regime required with...

We present a framework for relativistic quantum metrology that is useful both Earth-based and space-based technologies. Quantum has been so far successfully applied to design precision instruments such as clocks sensors which outperform classical devices by exploiting properties. There are advanced plans implement these other technologies in space, instance Space-QUEST Space Optical Clock projects intend communications at regimes where relativity starts kick in. However, typical setups do...

We show how the dynamical modulation of qubit-field coupling strength in a circuit quantum electrodynamics architecture mimics motion qubit at relativistic speeds. This allows us to propose realistic experiment detect microwave photons coming from simulated acceleration radiation. Moreover, by combining this technique with Casimir physics, we enhance toolbox for studying phenomena field theory superconducting circuits.

Spontaneous parametric downconversion (SPDC) has been a key enabling technology in exploring quantum phenomena and their applications for decades. For instance, traditional SPDC, which splits high energy pump photon into two lower photons, is common way to produce entangled pairs. Since the early realizations of researchers have thought generalize it higher order, e.g., triplets. However, directly generating triplets through single SPDC process remained elusive. Here, using flux-pumped...

We show that the states generated by a three-mode spontaneous parametric downconversion (SPDC) interaction Hamiltonian possess tripartite entanglement of different nature to other paradigmatic entangled combination two-mode SPDCs interactions. While SPDC generates gaussian whose can be characterized standard criteria based on quantum correlations, these fail capture SPDC. use built from correlation functions class recently in superconducting-circuit implementation ideally have entanglement,...

We use digital quantum computing to simulate the creation of particles in a dynamic spacetime. consider system consisting minimally coupled massive scalar field spacetime undergoing homogeneous and isotropic expansion, transitioning from one stationary state another through brief inflationary period. two vibration modes, positive negative for given momentum, by devising circuit that implements time evolution. With this circuit, we study number created after universe expands at rate, both...

We propose an experiment to test the effects of gravity and acceleration on quantum entanglement in space-based setups. show that between excitations two Bose–Einstein condensates is degraded after one them undergoes a change gravitational field strength. This prediction can be tested if are initially entangled separate satellites while being same orbit then moves different orbit. effect observable typical orbital manoeuvre nanosatellites like CanX4 CanX5.

We analyse the role of dynamical Casimir effect as a resource for quantum technologies, such cryptography and metrology. In particular, we consider generation Einstein-Podolsky-Rosen steering Gaussian interferometric power, two useful forms asymmetric correlations, in superconducting waveguides modulated by devices. show that, while certain value squeezing is required to overcome thermal noise give rise steering, any non-zero produces power which fact increases with noise.

We propose an implementation of a twin paradox scenario in superconducting circuits, with velocities as large few percent the speed light. Ultrafast modulation boundary conditions for electromagnetic field microwave cavity simulates clock moving at relativistic speeds. Since our has finite length, setup allows us to investigate role size well interesting quantum effects on time dilation. In particular, theoretical results show that dilation increases larger lengths and is shifted due...

The generation and distribution of entanglement is a central topic in quantum information science, enabling important applications communication computing. This has created great interest creating ``flying'' entangled states. authors present parametric cavity that generates multimode states microwave photons with programmable structure. advance will facilitate progress range fields, including cluster states, error-correctable logical qubits for communication, the simulation relativistic...

We show that simulated relativistic motion can generate entanglement between artificial atoms and protect them from spontaneous emission. consider a pair of superconducting qubits coupled to resonator mode, where the modulation coupling strength mimic harmonic at speeds, generating acceleration radiation. find optimal feasible conditions for stationary entangled state when they are initially prepared in their ground state. Furthermore, we analyse effects on probability emission standard...

We analyze the generation of quantum discord by means dynamical Casimir effect in superconducting wave guides modulated interferometric devices. show that for realistic experimental parameters, conditions existence are less demanding than previously considered entanglement or nonclassicality. These results could facilitate confirmation nature radiation. Moreover, states with nonzero and zero generated a useful resource cryptography.

The quantum Rabi model describes the interaction between a two-level system and single bosonic mode. We propose method to perform simulation of introducing novel implementation system, provided by occupation Bloch bands in first Brillouin zone ultracold atoms tailored optical lattices. effective qubit interacts with harmonic oscillator implemented an dipole trap. Our realistic proposal allows experimentally investigate for extreme parameter regimes, which are not achievable natural...

We propose a feasible experimental test of 1-D version the Fermi problem using superconducting qubits. give an explicit non-perturbative proof strict causality in this model, showing that probability excitation two-level artificial atom with dipolar coupling to quantum field is completely independent other qubit until signals from it may arrive. explain why perfect agreement existence nonlocal correlations and previous results which were used claim apparent problems for Fermi's two-atom system.

We present an analog quantum simulator of spacetimes containing traversable wormholes. A suitable spatial dependence in the external bias a dc-SQUID array mimics propagation light 1D wormhole background. The impedance places severe limitations on type spacetime that we are able to implement. However, find throat radius submillimeter range is achievable. show how modify this order allow existence closed timelike curves. fluctuations phase associated finite might be seen as Hawking's...

We show how to use relativistic motion and local phase shifts generate continuous variable Gaussian cluster states within cavity modes. Our results can be demonstrated experimentally using superconducting circuits where tuneable boundary conditions correspond mirrors moving with velocities close the speed of light. In particular, we propose generation a quadripartite square state as first example that readily implemented in laboratory. Since are universal resources for one-way quantum...

We analyze the entanglement dynamics of a system composed by pair neutral two-level atoms that are initially entangled, and electromagnetic field, in vacuum state, within formalism perturbative quantum field theory up to second order. show sudden death revival can occur while remain spacelike separated therefore cannot be related with photon exchange between atoms. interpret these phenomena as consequence transfer atom-atom atom-field vice versa. also consider different bipartitions system,...

We propose a simple circuit quantum electrodynamics (QED) experiment to test the generation of entanglement between two superconducting qubits. Instead usual cavity QED picture, we study qubits which are coupled an open transmission line and get entangled by exchange propagating photons. compute their dynamics using full field theory beyond rotating-wave approximation explore variety regimes go from weak coupling recently introduced ultrastrong-coupling regime. Due existence single photons...